6,694 results match your criteria Back Reconstruction


Snapshot hyperspectral imaging via spectral basis multiplexing in Fourier domain.

Opt Express 2018 Dec;26(25):32509-32521

Hyperspectral imaging is an important tool having been applied in various fields, but still limited in observation of dynamic scenes. In this paper, we propose a snapshot hyperspectral imaging technique which exploits both spectral and spatial sparsity of natural scenes. Under the computational imaging scheme, we conduct spectral dimension reduction and spatial frequency truncation to the hyperspectral data cube and snapshot it in a low cost manner. Read More

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http://dx.doi.org/10.1364/OE.26.032509DOI Listing
December 2018

Investigation of inner ear anatomy in mouse using X-ray phase contrast tomography.

Microsc Res Tech 2019 Jan 12. Epub 2019 Jan 12.

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.

A thorough understanding of inner ear anatomy is important for investigators. However, investigation of the mouse inner ear is difficult due to the limitations of imaging techniques. X-ray phase contrast tomography increases contrast 100-1,000 times compared with conventional X-ray imaging. Read More

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http://dx.doi.org/10.1002/jemt.23121DOI Listing
January 2019

Effects of Stromal Vascular Fraction on Breast Cancer Growth and Fat Engraftment in NOD/SCID Mice.

Aesthetic Plast Surg 2019 Jan 11. Epub 2019 Jan 11.

Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, 130 Dongdeokro, Jung-gu, Daegu, 41944, South Korea.

Background: To overcome unpredictable fat graft resorption, cell-assisted lipotransfer using stromal vascular fraction (SVF) has been introduced. However, its effect on cancer growth stimulation and its oncological safety are debatable. We investigated the effect of SVF on adjacent breast cancer and transplanted fat in a mouse model. Read More

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http://link.springer.com/10.1007/s00266-018-01304-2
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http://dx.doi.org/10.1007/s00266-018-01304-2DOI Listing
January 2019
1 Read

Evolution of the Large Nucleocytoplasmic DNA Viruses of Eukaryotes and Convergent Origins of Viral Gigantism.

Adv Virus Res 2019 10;103:167-202. Epub 2018 Nov 10.

National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD, United States.

The Nucleocytoplasmic Large DNA Viruses (NCLDV) of eukaryotes (proposed order "Megavirales") comprise an expansive group of eukaryotic viruses that consists of the families Poxviridae, Asfarviridae, Iridoviridae, Ascoviridae, Phycodnaviridae, Marseilleviridae, Pithoviridae, and Mimiviridae, as well as Pandoraviruses, Molliviruses, and Faustoviruses that so far remain unaccounted by the official virus taxonomy. All these viruses have double-stranded DNA genomes that range in size from about 100 kilobases (kb) to more than 2.5 megabases. Read More

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http://dx.doi.org/10.1016/bs.aivir.2018.09.002DOI Listing
November 2018

Autologous Breast Reconstruction With a Delay Procedure of the Deep Inferior Epigastric Artery Perforator Flap Because of Venous Congestion of the Flap on Pedicle: A Case Series.

Ann Plast Surg 2019 Jan 9. Epub 2019 Jan 9.

Department of Plastic, Reconstructive & Hand Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands.

The deep inferior epigastric artery perforator (DIEP) flap is one of the most used free flaps for the reconstruction of the breast after a mastectomy. Despite careful selection of the patients and preoperative imaging, difficulties in vascularization of the flap can occur in some cases. Although multiple vascular connections (bipedicled, turbocharged, or stacked) can be made in selected cases, there can still be venous congestion before the flap is transferred. Read More

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http://dx.doi.org/10.1097/SAP.0000000000001752DOI Listing
January 2019

Noise reduction and image quality in ultra-high resolution computed tomography of the temporal bone using advanced modeled iterative reconstruction.

Acta Radiol 2019 Jan 8:284185118820699. Epub 2019 Jan 8.

1 Department of Diagnostic and Interventional Neuroradiology, Eberhard Karls University, Tübingen, Germany.

Background: The novel advanced modeled iterative reconstruction (ADMIRE) algorithm in ultra-high-resolution (UHR) computed tomography (CT) of the temporal bone has not yet been systematically evaluated.

Purpose: To assess the potential of ADMIRE in temporal bone UHR CT.

Material And Methods: Forty-four patients who underwent UHR CT of the temporal bone using z-axis UHR protocol were retrospectively selected for analysis. Read More

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http://dx.doi.org/10.1177/0284185118820699DOI Listing
January 2019

Comparison of source localization techniques in diffuse optical tomography for fNIRS application using a realistic head model.

Biomed Opt Express 2018 Jul 7;9(7):2994-3016. Epub 2018 Jun 7.

LIONLAB, Centre de recherche du CHU Sainte-Justine, Université de Montréal, Montréal, Canada.

Functional near-infrared spectroscopy (fNIRS) is a non-invasive imaging technique that elicits growing interest for research and clinical applications. In the last decade, efforts have been made to develop a mathematical framework in order to image the effective sources of hemoglobin variations in brain tissues. Different approaches can be used to impose additional information or constraints when reconstructing the cerebral images of an ill-posed problem. Read More

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http://dx.doi.org/10.1364/BOE.9.002994DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6033567PMC

A Label-free Multicolor Optical Surface Tomography (ALMOST) imaging method for nontransparent 3D samples.

BMC Biol 2019 Jan 7;17(1). Epub 2019 Jan 7.

VIB Bio Imaging Core, Herestraat 49, Box 602, 3000, Leuven, Belgium.

Background: Current mesoscale 3D imaging techniques are limited to transparent or cleared samples or require the use of X-rays. This is a severe limitation for many research areas, as the 3D color surface morphology of opaque samples-for example, intact adult Drosophila, Xenopus embryos, and other non-transparent samples-cannot be assessed. We have developed "ALMOST," a novel optical method for 3D surface imaging of reflective opaque objects utilizing an optical projection tomography device in combination with oblique illumination and optical filters. Read More

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http://dx.doi.org/10.1186/s12915-018-0614-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6323867PMC
January 2019

Enhancing sparse-view photoacoustic tomography with combined virtually parallel projecting and spatially adaptive filtering.

Biomed Opt Express 2018 Sep 31;9(9):4569-4587. Epub 2018 Aug 31.

College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China.

To fully realize the potential of photoacoustic tomography (PAT) in preclinical and clinical applications, rapid measurements and robust reconstructions are needed. Sparse-view measurements have been adopted effectively to accelerate the data acquisition. However, since the reconstruction from the sparse-view sampling data is challenging, both the effective measurement and the appropriate reconstruction should be taken into account. Read More

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http://dx.doi.org/10.1364/BOE.9.004569DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6157779PMC
September 2018

Editorial Commentary: Put Me Back Into The Game Coach! It's Time, I'm Ready: Time Is of No Essence After An Anterior Cruciate Ligament Reconstruction.

Authors:
Peter DeLuca

Arthroscopy 2019 Jan;35(1):163-165

Philadelphia, Pennsylvania.

Retear after an anterior cruciate ligament reconstruction is unavoidable. Many variables contribute to graft failure after anterior cruciate ligament reconstruction. Time from surgery to return to play is not the sole determinant. Read More

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http://dx.doi.org/10.1016/j.arthro.2018.10.006DOI Listing
January 2019

Risk characterization of bisphenol-A in the Slovenian population starting from human biomonitoring data.

Environ Res 2018 Dec 25;170:293-300. Epub 2018 Dec 25.

Aristotle University of Thessaloniki, Department of Chemical Engineering, Environmental Engineering Laboratory, University Campus, Thessaloniki 54124, Greece; HERACLES Research Center on the Exposome and Health, Center for Interdisciplinary Research and Innovation, Aristotle University of Thessaloniki, Balkan Center, Bldg. B, 10th km Thessaloniki-Thermi Road, 57001, Greece; School for Advanced Study (IUSS), Piazza della Vittoria 15, Pavia 27100, Italy.

The current study aims to characterize exposure and risk associated to bisphenol-A (BPA) exposure in Slovenia, starting from biomonitoring data. Based on the urinary data, daily intake for the individuals was back-calculated using a physiology based biokinetic (PBBK) model properly parameterized for BPA, coupled with an exposure reconstruction algorithm. Re-running the PBBK model in forward mode allowed the estimation of biologically effective dose (free plasma BPA) and the respective daily area under the curve (AUC). Read More

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http://dx.doi.org/10.1016/j.envres.2018.12.056DOI Listing
December 2018

Feasibility of radiation dose reduction with iterative reconstruction in abdominopelvic CT for patients with inappropriate arm positioning.

PLoS One 2018 31;13(12):e0209754. Epub 2018 Dec 31.

Department of Radiology, Yonsei University Health System, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea.

Background: The arms-down position increases computed tomography (CT) radiation dose. Iterative reconstruction (IR) could enhance image quality without increasing radiation dose in patients with arms-down position.

Aim: To investigate the feasibility of reduced-dose CT with IR for patients with inappropriate arm positioning. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209754PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6312263PMC
December 2018

Management of patch infections after carotid endarterectomy and utility of femoral vein interposition bypass graft.

J Vasc Surg 2018 Dec 24. Epub 2018 Dec 24.

Division of Vascular Surgery and Endovascular Therapy, University of Florid, Gainesville, Fla.

Objective: Patch infection after carotid endarterectomy (CEA) is a rare but devastating complication. A variety of different treatment options are reported; however, there is currently no consensus on how to manage this highly morbid problem. The purpose of this study was to review our experience with management of infectious patch complications after CEA and to highlight utility of femoral vein interposition bypass grafting. Read More

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http://dx.doi.org/10.1016/j.jvs.2018.09.036DOI Listing
December 2018
1 Read

RADIATION DOSE AND IMAGE QUALITY IN PEDIATRIC HEAD CT.

Radiat Prot Dosimetry 2018 Dec;182(3):310-316

Department of Radiology and Radiological Science, Medical University of South Carolina, 96 Jonathan Lucas Street, MSC 323, Charleston, SC, USA.

Our goal was to define a pediatric head CT protocol able to provide images of diagnostic quality, using the least amount of radiation, in children <10 years of age, while using a filtered back projection reconstruction algorithm. Image quality of 119 pediatric head CTs was assessed using a 5-point scoring system. Exams with scores ≥2. Read More

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http://dx.doi.org/10.1093/rpd/ncy066DOI Listing
December 2018
1 Read

Ultra-low dose CT colonography with automatic tube current modulation and sinogram-affirmed iterative reconstruction: Effects on radiation exposure and image quality.

J Appl Clin Med Phys 2019 Jan 26;20(1):321-330. Epub 2018 Dec 26.

Department of Neuroscience Imaging and Clinical Sciences, University "G. d'Annunzio", SS. Annunziata Hospital, Chieti, Italy.

Objective: To assess the radiation dose and image quality of ultra-low dose (ULD)-CT colonography (CTC) obtained with the combined use of automatic tube current (mAs) modulation with a quality reference mAs of 25 and sinogram-affirmed iterative reconstruction (SAFIRE), compared to low-dose (LD) CTC acquired with a quality reference mAs of 55 and reconstructed with filtered back projection (FBP).

Methods: Eighty-two patients underwent ULD-CTC acquisition in prone position and LD-CTC acquisition in supine position. Both ULD-CTC and LD-CTC protocols were compared in terms of radiation dose [weighted volume computed tomography dose index (CTDI ) and effective dose], image noise, image quality, and polyp detection. Read More

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http://dx.doi.org/10.1002/acm2.12510DOI Listing
January 2019

Non-inferior low-dose coronary computed tomography angiography image quality with knowledge-based iterative model reconstruction for overweight patients.

PLoS One 2018 26;13(12):e0209243. Epub 2018 Dec 26.

Department of Radiology and Research Institute of Radiological Science, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.

We investigated the feasibility of low-dose coronary computed tomography angiography (CCTA), using a prospective electrocardiogram (ECG)-triggered axial scan protocol, knowledge-based iterative model reconstruction (IMR), and fixed tube current, in overweight subjects. Forty non-overweight (group A; body-mass index [BMI] < 25 kg/m2) and 40 overweight individuals (group B; BMI = 25-30 kg/m2), who underwent CCTA for coronary artery disease screening, were retrospectively and consecutively enrolled. A 64-slice CT scanner was used at 100-kVp tube voltage and 150-mA tube current, and images were reconstructed using IMR techniques. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209243PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6306215PMC
December 2018

[Clinical application of computed tomography angiography and three-dimensional reconstruction in repairing high-voltage electrical burn wounds in necks, shoulders, axillas, and upper arms with tissue flaps].

Zhonghua Shao Shang Za Zhi 2018 Dec;34(12):874-880

Department of Burns and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, China.

To explore the application value of computed tomography angiography (CTA) and three-dimensional reconstruction in repairing high-voltage electrical burn wounds in necks, shoulders, axillas, and upper arms with tissue flaps. From December 2014 to December 2018, 12 patients with high-voltage electrical burns in necks, shoulders, axillas, and upper arms were hospitalized. The size of wounds ranged from 13 cm×10 cm to 32 cm×15 cm after complete debridement. Read More

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http://dx.doi.org/10.3760/cma.j.issn.1009-2587.2018.12.011DOI Listing
December 2018

Dual-modality optical projection tomography reconstruction method from fewer views.

J Biophotonics 2018 Dec 21:e201800407. Epub 2018 Dec 21.

Zhejiang University of Technology, Hangzhou, China.

In optical projection tomography (OPT), for longitudinal living model studies, multiple measurements of the same sample are required at different time points. It is important to decrease both the total acquisition time and the light dose to the sample. We improved the ordered subsets expectation maximization reconstruction algorithm for OPT, which reduces the acquisition time and number of projections greatly compared with filtered back projection (FBP), and obtained satisfactory reconstructed images. Read More

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http://dx.doi.org/10.1002/jbio.201800407DOI Listing
December 2018

Posterior intercostal artery perforator flap for posterior trunk reconstruction: Perforator mapping with high-resolution ultrasound and clinical application.

J Plast Reconstr Aesthet Surg 2018 Dec 13. Epub 2018 Dec 13.

Section of Plastic and Reconstructive Surgery, Department of General Surgery, Kepler University Hospital - Medcampus 3, Krankenhausstrasse 9, A-4020 Linz, Austria; Johannes Kepler University Linz, Medical Faculty, Department of General Surgery, Altenberger Strasse 69, 4040 Linz, Austria.

Background: Pedicled perforator flaps have progressively been used for reconstructive purposes of the anterior trunk. However, reports regarding perforator flaps for local reconstruction of the posterior trunk are sparse. The aim of this study was to investigate the vascular basis of perforator flaps based on the posterior intercostal arteries and to highlight the clinical versatility of these flaps for local posterior trunk reconstruction. Read More

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http://dx.doi.org/10.1016/j.bjps.2018.12.005DOI Listing
December 2018

Reverse turnover pedicled latissimus dorsi muscle flap for lower back reconstruction: Two case reports.

Medicine (Baltimore) 2018 Dec;97(51):e13851

Department of Orthopedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Rationale: Large soft tissue defects on the lower back represent a treatment challenge. Among a variety of reconstructive procedures, the latissimus dorsi (LD) muscle or musculocutaneous flap is one of most frequently used pedicled flaps. However, the pedicled LD flap carries a bulky pivot point and a short arc of rotation. Read More

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http://Insights.ovid.com/crossref?an=00005792-201812210-0013
Publisher Site
http://dx.doi.org/10.1097/MD.0000000000013851DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6320210PMC
December 2018
3 Reads

[Application of femoral-femoral artery bypass grafting combined with transverse tibial bone transporting for lower extremity arteriosclerosis obliterans or combined with diabetic foot].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2018 Dec;32(12):1576-1580

Department of Hand Surgery, Repair and Reconstruction Surgery, Lower Limb Vascular Disease, the Second Hospital of Tangshan (the Affiliated Hospital of North China Polytechnic University), Tangshan Hebei, 063000, P.R.China.

Objective: To discuss the effectiveness of femoral-femoral artery bypass grafting combined with transverse tibial bone transporting in treatment of lower extremity arteriosclerosis obliterans (ASO) or combined with diabetic foot.

Methods: Between March 2014 and June 2016, 9 patients with lower extremity ASO or combined with diabetic feet were treated with femoral-femoral artery bypass grafting and transverse tibial bone transporting. All patients were male, aged from 63 to 82 years with an average of 74. Read More

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http://dx.doi.org/10.7507/1002-1892.201806124DOI Listing
December 2018

[Vertebral three-dimensional motion characteristics of adjacent segments in patients with isthmic spondylolisthesis ].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2018 Dec;32(12):1560-1566

Department of Orthopedics, Affiliated Hospital of Logistics University of Chinese People's Armed Police Forces, Tianjin, 300162, P.R.China.

Objective: To observe vertebral three-dimensional motion characteristics of adjacent segments in patients with symptomatic L isthmic spondylolisthesis (IS).

Methods: Fourteen symptomatic L IS patients who underwent surgery treatment (trial group) and 15 asymptomatic volunteers without back pain and other lesions of spine (control group) were recruited. There was no significant difference in gender, age, body mass index, and bone mineral density between the two groups ( >0. Read More

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http://dx.doi.org/10.7507/1002-1892.201807026DOI Listing
December 2018

Back-propagation neural network-based reconstruction algorithm for diffuse optical tomography.

J Biomed Opt 2018 Dec;24(5):1-12

Beijing Univ. of Technology, China.

Diffuse optical tomography (DOT) is a promising noninvasive imaging modality and is capable of providing functional characteristics of biological tissue by quantifying optical parameters. The DOT image reconstruction is ill-posed and ill-conditioned, due to the highly diffusive nature of light propagation in biological tissues and limited boundary measurements. The widely used regularization technique for DOT image reconstruction is Tikhonov regularization, which tends to yield oversmoothed and low-quality images containing severe artifacts. Read More

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http://dx.doi.org/10.1117/1.JBO.24.5.051407DOI Listing
December 2018

[Improvement of Image Quality in the Axial Section Using High-resolution Scan Mode and Hybrid Iterative Reconstruction in Ultra-high-resolution Computed Tomography].

Nihon Hoshasen Gijutsu Gakkai Zasshi 2018 ;74(12):1419-1427

Division of Radiology, Department of Medical Technology, Kyushu University Hospital.

The purpose of this study is to compare the physical characteristics and visibility of high-resolution and conventional images acquired with the same X-ray dose, and to investigate the superiority of super high-resolution imaging. A Catphan phantom was scanned in the normal resolution (NR), high-resolution (HR), and super high-resolution (SHR) modes of ultra-high-resolution computed tomography at 120 kV and 75 mAs. All images were reconstructed into a 5-mm thick image slices with filtered back-projection (FBP) and hybrid image reconstruction (HIR), which included normal and enhanced adaptive iterative dose reduction 3D (AIDR and eAIDR, respectively). Read More

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http://dx.doi.org/10.6009/jjrt.2018_JSRT_74.12.1419DOI Listing
January 2018

Automatic measurement of air gap for proton therapy using orthogonal x-ray imaging with radiopaque wires.

J Appl Clin Med Phys 2019 Jan 16;20(1):356-360. Epub 2018 Dec 16.

Department of Radiation Oncology, Rutgers-Cancer Institute of New Jersey, Rutgers-Robert Wood Johnson University Hospital, Rutgers-The State University of New Jersey, New Brunswick, NJ, USA.

Purpose: The main objective of this study was to develop a technique to accurately determine the air gap between the end of the proton beam compensator and the body of the patient in proton radiotherapy.

Methods: Orthogonal x-ray image-based automatic coordinate reconstruction was used to determine the air gap between the patient body surface contour and the end of beam nozzle in proton radiotherapy. To be able to clearly identify the patient body surface contour on the orthogonal images, a radiopaque wire was placed on the skin surface of the patient as a surrogate. Read More

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http://dx.doi.org/10.1002/acm2.12509DOI Listing
January 2019
2 Reads

Image quality and dose reduction in sinus computed tomography using iterative reconstruction: a cadaver study.

Rhinol Online 2018 ;1:45-49

Department of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill, USA.

Background: Concerns about radiation dose in computed tomography (CT) imaging have renewed interest in iterative reconstruction (IR), a technique which has the potential to produce images with less noise at lower radiation doses than traditional filtered back projection (FBP). This study aimed to assess whether application of IR could provide comparable quality sinus CT images to FBP at lower kilovolt (kV) and milliamp (mA) settings, and to establish optimal scan settings for sinus imaging.

Methodology/principal: 30 sinus CT scans were performed on 5 cadaver heads at two kV setting and three mA settings. Read More

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http://dx.doi.org/10.4193/RHINOL/18.015DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6292212PMC
January 2018

Outpatient management in plastic and reconstructive head and neck surgery in France.

Eur Ann Otorhinolaryngol Head Neck Dis 2018 Dec 11. Epub 2018 Dec 11.

Service d'ORL et de chirurgie cervico-faciale, centre hospitalier universitaire de Nantes, Hôtel-Dieu, 1, place A. Ricordeau, BP 1005, 44093 Nantes cedex 01, France.

The present review lays out the main principles governing outpatient management in the French health system in 2018, and more specifically in plastic and reconstructive head and neck surgery. The historical regulatory aspects and the changes of the last few years are explained, along with the trends and health authorities' expectations for the years to come. The main limitations to implementing outpatient procedures are the common to all surgical specialities, plastic and reconstructive head and neck surgery being no exception. Read More

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http://dx.doi.org/10.1016/j.anorl.2018.11.003DOI Listing
December 2018

Sparsity-based photoacoustic image reconstruction with a linear array transducer and direct measurement of the forward model.

J Biomed Opt 2018 Dec;24(3):1-9

Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States.

Photoacoustic (PA) imaging is an emerging imaging technique for many clinical applications. One of the challenges posed by clinical translation is that imaging systems often rely on a finite-aperture transducer rather than a full tomography system. This results in imaging artifacts arising from an underdetermined reconstruction of the initial pressure distribution (IPD). Read More

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http://dx.doi.org/10.1117/1.JBO.24.3.031015DOI Listing
December 2018

Laparoscopic extracorporeal repair without a mesh of parasternal diaphragmatic hernia in an elderly woman: A case report.

Medicine (Baltimore) 2018 Dec;97(49):e13546

Department of Thoracic Surgery, The Affiliated People's Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian Province, China.

Rationale: The case of parasternal diaphragmatic hernia is relatively rare in adults. The best way for the treatment of diaphragmatic hernia is to receive operation, yet which surgical method is the best remains unclear.

Patient Concerns: An elderly woman in the hospital was complaining about upper abdominal pain that was complicated by the parasternal diaphragmatic hernia. Read More

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http://dx.doi.org/10.1097/MD.0000000000013546DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6310593PMC
December 2018

Local fixation of antibiotics with fibrin spray on soft tissues: experimental study on the relevance of the application techniques.

Eur J Trauma Emerg Surg 2018 Dec 12. Epub 2018 Dec 12.

Department of Trauma, Hand and Reconstructive Surgery, Hospital of the Goethe-University, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany.

Objective: In acute and chronic infections of soft tissue, a radical surgical debridement is necessary, and is regarded as the 'Gold Standard, as well as an immediately systemic antibiotic therapy. Additional treatment with local antibiotics and/or antibiotic-containing materials is commonly used in clinical settings, but the efficient concentration of the antibiotic is not well-known.

Methods: Aside from the typical procedures which are provided and supported by the industry, we have conducted an animal study including 39 Sprague Dawley rats. Read More

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http://dx.doi.org/10.1007/s00068-018-1054-0DOI Listing
December 2018

Statistical weights for model-based reconstruction in cone-beam CT with electronic noise and dual-gain detector readout.

Phys Med Biol 2018 Dec 14;63(24):245018. Epub 2018 Dec 14.

Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, United States of America.

Cone-beam CT (CBCT) systems commonly incorporate a flat-panel detector (FPD) with multiple-gain readout capability to reduce electronic noise and extend dynamic range. In this work, we report a penalized weighted least-squares (PWLS) method for CBCT image reconstruction with a system model that includes the electronic noise characteristics of FPDs, including systems with dynamic-gain or dual-gain (DG) readout in which the electronic noise is spatially varying. Statistical weights in PWLS were modified to account for the contribution of the electronic noise (algorithm denoted [Formula: see text]), and the method was combined with a certainty-based approach that improves the homogeneity of spatial resolution (algorithm denoted [Formula: see text]). Read More

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http://dx.doi.org/10.1088/1361-6560/aaf0b4DOI Listing
December 2018
1 Read

A respiratory-guided 4D digital tomosynthesis.

Phys Med Biol 2018 Dec 10;63(24):245007. Epub 2018 Dec 10.

Department of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. Program of Medical Physics and Engineering, Department of Biomedicine and Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea.

The aim of this research was to introduce and evaluate a respiratory-guided slow gantry rotation 4D digital tomosynthesis (DTS). For each of ten volunteers, two breathing patterns were obtained for 3 min, one under free breathing conditions and the other with visual respiratory-guidance using an in-house developed respiratory monitoring system based on pressure sensing. Visual guidance was performed using a 4 s cycle sine wave with an amplitude corresponding to the average of end-inhalation peaks and end-exhalation valleys from the free-breathing pattern. Read More

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http://dx.doi.org/10.1088/1361-6560/aaeddbDOI Listing
December 2018
1 Read

Monte Carlo-based SPECT reconstruction within the SIMIND framework.

Phys Med Biol 2018 Dec 12;63(24):245012. Epub 2018 Dec 12.

Department of Medical Radiation Physics, Lund University, Lund, Sweden. Author to whom any correspondence should be addressed.

This paper presents the development and validation of a Monte Carlo-based singe photon emission computed tomography reconstruction program for parallel-hole collimation contained within the SIMIND Monte Carlo framework. The Monte Carlo code is used as an accurate forward-projector and is combined with a simplified back-projector to perform iterative tomographic reconstruction using the Maximum Likelihood Expectation Maximization and Ordered Subsets Expectation Maximization algorithms, together forming a program called SIMREC. The Monte Carlo simulation transforms the estimated source distribution directly from activity to counts in its projections. Read More

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http://stacks.iop.org/0031-9155/63/i=24/a=245012?key=crossre
Publisher Site
http://dx.doi.org/10.1088/1361-6560/aaf0f1DOI Listing
December 2018
5 Reads

Constrained temporal parallel decomposition for EEG-fMRI fusion.

J Neural Eng 2019 Feb 9;16(1):016017. Epub 2018 Nov 9.

School of Electrical Engineering and Computer Science, Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia. School of Pharmacy, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.

Objective: Multimodal neuroimaging has become a common practice in neuroscience research. Simultaneous EEG-fMRI is a popular multimodal recording approach due to the complementary spatiotemporal relationship between the two modalities. Several data fusion techniques have been proposed in the literature for EEG-fMRI fusion, including joint-ICA and parallel-ICA frameworks. Read More

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http://dx.doi.org/10.1088/1741-2552/aaefdaDOI Listing
February 2019
1 Read

Potential value of the PixelShine deep learning algorithm for increasing quality of 70 kVp+ASiR-V reconstruction pelvic arterial phase CT images.

Jpn J Radiol 2018 Dec 6. Epub 2018 Dec 6.

Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA.

Objective: To investigate the effect of a deep learning-based denoising algorithm, PixelShine (PS), on the quality of 70 kVp pelvic arterial phase CT images.

Materials And Methods: A retrospective analysis was performed on arterial phase pelvic CT images from 33 patients (body-mass index ≤ 20 kg/m) obtained with a GE Revolution CT (70 kVp tube voltage; adaptive statistical iterative reconstruction-Veo-filtered back projection, 50% blending) and designated group A. Group B images were then obtained by applying PS to group A image datasets. Read More

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http://dx.doi.org/10.1007/s11604-018-0798-0DOI Listing
December 2018

Interior x-ray diffraction tomography with low-resolution exterior information.

Phys Med Biol 2019 Jan 10;64(2):025009. Epub 2019 Jan 10.

CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, United States of America. Author to whom any correspondence should be addressed.

X-ray diffraction tomography (XDT) resolves spatially-variant XRD profiles within macroscopic objects, and provides improved material contrast compared to the conventional transmission-based computed tomography (CT). However, due to the small diffraction cross-section, XDT suffers from long imaging acquisition time, which could take tens of hours for a full scan using a table-top x-ray tube. In medical and industrial imaging applications, oftentimes only the XRD measurement within a region-of-interest (ROI) is required, which, together with the demand to reduce imaging time and radiation dose to the sample, motivates the development of interior XDT systems that scan and reconstruct only an internal region within the sample. Read More

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http://dx.doi.org/10.1088/1361-6560/aaf819DOI Listing
January 2019

Ariadne's Thread: An Easy Way to Find Your Way Back to the Glenohumeral Joint Through the Posterior Portal Once You Have Left.

Arthrosc Tech 2018 Nov 29;7(11):e1231-e1234. Epub 2018 Oct 29.

Department of Orthopedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland.

Finding the way back into the glenohumeral space after a time-consuming rotator cuff reconstruction is not always easy because of swelling of the surrounding soft tissues. We present a safe and quick technical tip on how to reintroduce the arthroscope by means of a transarticular suture. After primary work in the glenohumeral space is performed and before the arthroscope is withdrawn from the joint, a monofilament suture is channeled from the anterior working portal through the glenohumeral joint to exit from the posterior portal. Read More

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http://dx.doi.org/10.1016/j.eats.2018.08.008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6262757PMC
November 2018
1 Read

Task-Based Model Observer Assessment of A Partial Model-Based Iterative Reconstruction Algorithm in Thoracic Oncologic Multidetector CT.

Sci Rep 2018 Dec 7;8(1):17734. Epub 2018 Dec 7.

Department of Diagnostic and Interventional Radiology, Lausanne University Hospital, Rue du Bugnon 46, 1011, Lausanne, Switzerland.

To investigate the impact of a partial model-based iterative reconstruction (ASiR-V) on image quality in thoracic oncologic multidetector computed tomography (MDCT), using human and mathematical model observers. Twenty cancer patients examined with regular-dose thoracic-abdominal-pelvic MDCT were retrospectively included. Thoracic images reconstructed using a sharp kernel and filtered back-projection (reference) or ASiR-V (0-100%, 20% increments; follow-up) were analysed by three thoracic radiologists. Read More

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http://dx.doi.org/10.1038/s41598-018-36045-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6286352PMC
December 2018
1 Read

Cryo-Compression Therapy After Elective Spinal Surgery for Pain Management: A Cross-Sectional Study With Historical Control.

Neurospine 2018 Dec 9;15(4):348-352. Epub 2018 Sep 9.

Ankara Spine Center, Ankara, Turkey.

Objective: Postoperative dynamic cryo-compression (DC) therapy has been proposed as a method of reducing pain and the inflammatory response in the early postoperative period after orthopedic joint reconstruction surgery. Our aim was to analyze the analgesic efficacy of DC therapy after adult lumbar spinal surgery.

Methods: DC was applied for 30 minutes every 6 hours after surgery. Read More

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http://e-neurospine.org/journal/view.php?doi=10.14245/ns.183
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http://dx.doi.org/10.14245/ns.1836070.035DOI Listing
December 2018
8 Reads

Novel muon imaging techniques.

Philos Trans A Math Phys Eng Sci 2018 Dec 10;377(2137). Epub 2018 Dec 10.

National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, Cumbria CA20 1PG, UK.

Owing to the high penetrating power of high-energy cosmic ray muons, muon imaging techniques can be used to image large bulky objects, especially objects with heavy shielding. Muon imaging systems work just like CT scanners in the medical imaging field-that is, they can reveal information inside of a target. There are two forms of muon imaging techniques: muon absorption imaging and muon multiple scattering imaging. Read More

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http://dx.doi.org/10.1098/rsta.2018.0062DOI Listing
December 2018

Cutaneous Metastasis via Surgical Planes Following Lumbar Spinal Reconstruction for Spinal Metastatic Disease.

World Neurosurg 2018 Dec 5. Epub 2018 Dec 5.

Division of Spine Surgery, Department of Orthopaedics, Alpert Medical School of Brown University; 1 Kettle Point Ave, East Providence, RI. Electronic address:

Background: Cervical squamous cell carcinoma is the second most common cancer in women worldwide, and the third most common cause of female cancer mortality. It frequently metastasizes to the osseous spine and has been rarely reported to cause cutaneous metastases at gynecological surgical scars.

Case Description: A 63-year-old woman with known metastatic cervical squamous cell carcinoma presented with a pathologic fracture of the L2 vertebra, unrelenting back pain, bilateral lower extremity weakness, and inability to ambulate. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S18788750183277
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http://dx.doi.org/10.1016/j.wneu.2018.11.218DOI Listing
December 2018
7 Reads

Basics of iterative reconstruction methods in computed tomography: A vendor-independent overview.

Authors:
Wolfram Stiller

Eur J Radiol 2018 Dec 26;109:147-154. Epub 2018 Oct 26.

Diagnostic & Interventional Radiology (DIR), Heidelberg University Hospital, Heidelberg, Germany. Electronic address:

Over the past two decades, technical innovations in computed tomography (CT) have constantly extended its spectrum of clinical applications and made new radiodiagnostic applications accessible. At the same time, concerns have arisen with respect to the radiation exposure to the patients caused by CT examinations. In order to address this issue, different strategies for radiation dose reduction in CT have been introduced, spanning technical approaches as well as specific examination techniques applied in clinical practice, such as reduced-dose CT. Read More

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http://dx.doi.org/10.1016/j.ejrad.2018.10.025DOI Listing
December 2018

Ultrasonic Transmission Tomography Sensor Design for Bubble Identification in Gas-Liquid Bubble Column Reactors.

Sensors (Basel) 2018 Dec 4;18(12). Epub 2018 Dec 4.

School of Automation, Northwestern Polytechnical University, Xi'an 710129, China.

Scientists require methods to monitor the distribution of gas bubbles in gas-liquid bubble column reactors. One non-destructive method that can potential satisfy this requirement in industrial situations is ultrasonic transmission tomography (UTT). In this paper, an ultrasonic transmission tomography sensor is designed for measuring bubble distribution in a reactor. Read More

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http://dx.doi.org/10.3390/s18124256DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308999PMC
December 2018
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A new propeller trapezius muscle flap for reconstruction of posterior trunk defects: An anatomic study and report of three cases.

Microsurgery 2018 Dec 3. Epub 2018 Dec 3.

Department of Plastic and Reconstructive Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio.

Background: Reconstruction of complex back defects, especially after corrective spine surgery, is a challenging problem. In these patients hardware issues predominate and flap failure has serious consequences. Certain subunits of the back pose even greater problems, specifically the central region between T9 and T12. Read More

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http://dx.doi.org/10.1002/micr.30395DOI Listing
December 2018
2 Reads

CARE Dose 4D combined with sinogram-affirmed iterative reconstruction improved the image quality and reduced the radiation dose in low dose CT of the small intestine.

J Appl Clin Med Phys 2019 Jan 3;20(1):293-307. Epub 2018 Dec 3.

Department of Radiology, The Second Affiliated Hospital of Nantong University, Jiangsu, China.

Objective: Multislice computed tomography (MSCT) has been used for diagnosis of small intestinal diseases. However, the radiation dose is a big problem. This study was to investigate whether CARE Dose 4D combined with sinogram-affirmed iterative reconstruction (SAFIRE) can provide better image quality at a lower dose for imaging small intestinal diseases compared to MSCT. Read More

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http://doi.wiley.com/10.1002/acm2.12502
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http://dx.doi.org/10.1002/acm2.12502DOI Listing
January 2019
7 Reads

THE IMPACT OF OBESITY ON ABDOMINAL CT RADIATION DOSE AND IMAGE QUALITY.

Radiat Prot Dosimetry 2018 Dec 1. Epub 2018 Dec 1.

Radiography & Diagnostic Imaging, School of Medicine, University College Dublin, Dublin, Ireland.

The aim of this study was to evaluate how iterative reconstruction can compensate for the noise increase in low radiation dose abdominal computed tomography (CT) technique for large size patients and the general impact of obesity on abdominal organ doses and image quality in CT. An anthropomorphic phantom layered with either none or a single layer of 3-cm- thick circumferential animal fat packs to simulate obese patients was imaged using a 128MDCT scanner. Abdominal protocols (n = 12) were applied using automatic tube current modulation (ATCM) with various quality reference mAs (150, 200, 250 and 300). Read More

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http://dx.doi.org/10.1093/rpd/ncy212DOI Listing
December 2018
1 Read

Isokinetic knee strength and proprioception before and after anterior cruciate ligament reconstruction: A comparison between home-based and supervised rehabilitation.

J Back Musculoskelet Rehabil 2018 Nov 23. Epub 2018 Nov 23.

Major in Rehabilitation Science, Graduate School, Korea University, Seoul, Korea.

Background: Rehabilitation after anterior cruciate ligament (ACL) reconstruction focuses on restoring knee deficiencies and function. However, the extent of the clinician's direct supervision that is required to recover knee function is unknown.

Objective: To investigate differences in isokinetic knee strength improvement, endurance, and proprioception between home-based (HBR) and supervised rehabilitation (SR). Read More

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https://www.medra.org/servlet/aliasResolver?alias=iospress&a
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http://dx.doi.org/10.3233/BMR-181237DOI Listing
November 2018
10 Reads

The effect of poly-p-dioxanone plates on the protection and vitality of cartilage: An animal study.

Laryngoscope 2018 Dec 4. Epub 2018 Dec 4.

Department of Pathology, Faculty of Veterinary Medicine, Harran University, Sanliurfa, Turkey.

Objectives/hypothesis: In septorhinoplasty, septal, auricular, and costal cartilage are often used as autologous graft. Autologous grafts are preferred in nasal reconstruction. The aim of this study was to histopathologically examine the tissue compatibility and the effect on the stability and cartilage vitality of poly-p-dioxanone (PDS) plates. Read More

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http://dx.doi.org/10.1002/lary.27712DOI Listing
December 2018
1 Read

Richardson-Lucy deconvolution of time histograms for high-resolution non-line-of-sight imaging based on a back-projection method.

Opt Lett 2018 Dec;43(23):5885-5888

Non-line-of-sight (NLoS) imaging is a newly developed technique with widespread applications in recent years. At present, it is difficult for NLoS imaging to achieve a high-resolution reconstruction with an existing back-projection method. We propose a novel approach based on the Richardson-Lucy deconvolution of time histograms for high-resolution NLoS imaging. Read More

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http://dx.doi.org/10.1364/OL.43.005885DOI Listing
December 2018

Comparison of flap outcomes between single- and multiple-perforator-based free anterolateral thigh flap in head and neck reconstruction.

Microsurgery 2018 Nov 29. Epub 2018 Nov 29.

Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.

Introduction: The number of perforators required for safe perfusion remains under debate. This study aimed to determine whether a single- or multiple-perforator-based anterolateral thigh flap yields better flap outcomes in head and neck reconstruction.

Patients And Methods: Between August 2012 and July 2016, 180 men and 4 women with a mean age of 52. Read More

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http://dx.doi.org/10.1002/micr.30378DOI Listing
November 2018
1 Read