6,788 results match your criteria Back Reconstruction


The "Butterfly" Wrap: A Simplified Technique for Consistent Prosthesis Coverage in Prepectoral Breast Reconstruction.

Plast Reconstr Surg Glob Open 2018 Nov 16;6(11):e2007. Epub 2018 Nov 16.

Division of Plastic & Reconstructive Surgery, Department of Surgery, Washington University- St. Louis School of Medicine, St. Louis, Mo.

Background: Here, we describe our simple, systematic, reproducible, and effective method for prosthesis coverage in prepectoral breast reconstruction.

Methods: Our Butterfly Wrap is a simple technique, which provides prosthesis coverage with a single sheet of acellular dermal matrix (ADM) in a reproducible and elegant manner. The wrap design creates an anatomic tear-shaped pocket to guide expansion and encourage lower pole fullness, without ADM folding or bunching for optimal incorporation and minimal overlap. Read More

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http://dx.doi.org/10.1097/GOX.0000000000002007DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6414108PMC
November 2018

Urea-De-Epithelialized Human Amniotic Membrane for Ocular Surface Reconstruction.

Stem Cells Transl Med 2019 Mar 13. Epub 2019 Mar 13.

Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore.

The conjunctiva is a clear tissue covering the white part of the eye and lines the back of the eyelids. Conjunctival diseases, such as symblepharon, cause inflammation, discharges, and photophobia. The treatment often requires excision of large parts of conjunctiva. Read More

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http://dx.doi.org/10.1002/sctm.18-0201DOI Listing
March 2019
1 Read

Tumor-induced hypophosphatemic osteomalacia caused by a mesenchymal tumor of the mandible managed by a segmental mandibulectomy and microvascular reconstruction with a free fibula flap.

Head Neck 2019 Mar 11. Epub 2019 Mar 11.

Department of Endocrine Neoplasia and Hormonal Disorders, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas.

Background: Tumor-induced osteomalacia is a rare paraneoplastic syndrome in which patients develop hypophosphatemia and osteomalacia.

Methods And Results: Here, we report a unique case of a 42-year-old man who presented to our institution with a 1-year history of pain in his ribs, hips, lower back, and feet. Radiologic examination revealed a decrease in bone density and multiple insufficiency fractures. Read More

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http://dx.doi.org/10.1002/hed.25657DOI Listing
March 2019
1 Read

Efficient Recognition of Informative Measurement in the RF-Based Device-Free Localization.

Sensors (Basel) 2019 Mar 10;19(5). Epub 2019 Mar 10.

School of Data and Computer Science, Sun Yat-sen University, Guangzhou 510006, China.

Device-Free Localization (DFL) based on the Radio Frequency (RF) is an emerging wireless sensing technology to perceive the position information of the target. To realize the real-time DFL with lower power, Back-projection Radio Tomographic Imaging (BRTI) has been used as a lightweight method to achieve the goal. However, the multipath noise in the RF sensing network may interfere with the measurement and the BRTI reconstruction performance. Read More

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http://dx.doi.org/10.3390/s19051219DOI Listing

Bridging autologous reconstruction with pre-pectoral tissue expanders.

Gland Surg 2019 Feb;8(1):90-94

CMC Plastic Surgery, Charlotte, NC, USA.

Pre-pectoral reconstruction is steadily becoming more mainstream with recent publications showing equivalent results with traditional sub-pectoral published literature. Multiple authors have demonstrated short-term acceptable rates of infection, expander failure, success in radiated patients, and overall patient satisfaction. Some data has even shown improved outcomes in prepectoral reconstruction when compared to published subpectoral literature. Read More

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http://dx.doi.org/10.21037/gs.2018.11.07DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6378259PMC
February 2019
1 Read

Four-dimensional digital tomosynthesis image reconstruction using brute force-based adaptive total variation (BF-ATV) in a prototype LINAC system.

Phys Med Biol 2019 Mar 6. Epub 2019 Mar 6.

Department of Radiological Science, Yonsei University, 1 Yonseidaegil, Wonju, 220-710, KOREA, REPUBLIC OF.

Respiratory-correlated cone-beam CT (CBCT) not only inhibits rapid scanning due to the slow speed of the LINAC head gantry rotation, but its implementation for routine patient imaging is impractical because of the high radiation dose delivered during the process. Digital tomosynthesis (DTS) is a potentially faster technique that delivers a much lower radiation dose by reducing the number of projections in a limited angular range. Unfortunately, 4D-DTS introduces strong aliasing artifacts in the reconstructed images due to the sparsely sampled projections in each respiratory phase bin. Read More

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http://dx.doi.org/10.1088/1361-6560/ab0d50DOI Listing
March 2019
1 Read

3D shear wave velocity model of the crust and uppermost mantle beneath the Tyrrhenian basin and margins.

Sci Rep 2019 Mar 5;9(1):3609. Epub 2019 Mar 5.

The Abdus Salam International Center for Theoretical Physics, Trieste, Italy.

The Tyrrhenian basin serves as a natural laboratory for back-arc basin studies in the Mediterranean region. Yet, little is known about the crust-uppermost mantle structure beneath the basin and its margins. Here, we present a new 3D shear-wave velocity model and Moho topography map for the Tyrrhenian basin and its margins using ambient noise cross-correlations. Read More

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http://dx.doi.org/10.1038/s41598-019-40510-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6401166PMC

[Incident Photon Number and Reconstructed Linear Attenuation Coefficients in Iterative CT Image Reconstruction].

Igaku Butsuri 2019 ;38(4):143-158

Faculty of Health Sciences, Department of Medical Radiological Technology, Kyorin University.

[Purpose] The iterative CT image reconstruction (IR) method has been successfully incorporated into commercial CT scanners as a means to promote low-dose CT with high image quality. However, the algorithm of the IR method has not been made publicly available by scanner manufacturers. Kudo reviewed the fundamentals of IR methods on the basis of the articles published by the joint research group of each manufacture that were released before and during product development (Med Imag Tech 32: 239-248, 2014). Read More

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http://dx.doi.org/10.11323/jjmp.38.4_143DOI Listing
January 2019

Characterization of office laser printers for 3-D printing of soft tissue CT phantoms.

J Med Imaging (Bellingham) 2019 Apr 20;6(2):021602. Epub 2019 Feb 20.

Charité-Universitätsmedizin Berlin, Department of Radiology, Berlin, Germany.

The purpose of our study is to develop and evaluate a method for radiopaque 3-D printing (R3P) of soft tissue computed tomography (CT) phantoms with office laser printers. Five laser printers from different vendors are tested for toner CT attenuation. A liver phantom is created by printing CT images of a patient liver on office paper. Read More

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http://dx.doi.org/10.1117/1.JMI.6.2.021602DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6381603PMC

Effects of acquisition method and reconstruction algorithm for CT number measurement on standard-dose CT and reduced-dose CT: a QIBA phantom study.

Jpn J Radiol 2019 Feb 25. Epub 2019 Feb 25.

Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan.

Purpose: To compare the effect of different acquisition and reconstruction methods on the radiation dose and accuracy of CT number measurements, using a 320-detector row CT and a Quantitative Imaging Biomarker Alliance (QIBA) recommended phantom.

Materials And Methods: Acquisitions were performed on a 320-detector row CT, as 64- and 80-detector row helical and wide detector step-and-shoot (i.e. Read More

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http://dx.doi.org/10.1007/s11604-019-00823-5DOI Listing
February 2019
2 Reads

DVID: Distributed Versioned Image-Oriented Dataservice.

Front Neural Circuits 2019 5;13. Epub 2019 Feb 5.

Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, United States.

Open-source software development has skyrocketed in part due to community tools like github.com, which allows publication of code as well as the ability to create branches and push accepted modifications back to the original repository. As the number and size of EM-based datasets increases, the connectomics community faces similar issues when we publish snapshot data corresponding to a publication. Read More

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http://dx.doi.org/10.3389/fncir.2019.00005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371063PMC
February 2019

Morphology, pathology, and the vertebral posture of the La Chapelle-aux-Saints Neandertal.

Proc Natl Acad Sci U S A 2019 Mar 25;116(11):4923-4927. Epub 2019 Feb 25.

Institute of Evolutionary Medicine, University of Zürich, 8057 Zürich, Switzerland.

Although the early postural reconstructions of the Neandertals as incompletely erect were rejected half a century ago, recent studies of Neandertal vertebral remains have inferred a hypolordotic, flat lower back and spinal imbalance for them, including the La Chapelle-aux-Saints 1 skeleton. These studies form part of a persistent trend to view the Neandertals as less "human" than ourselves despite growing evidence for little if any differences in basic functional anatomy and behavioral capabilities. We have therefore reassessed the spinal posture of La Chapelle-aux-Saints 1 using a new pelvic reconstruction to infer lumbar lordosis, interarticulation of lower lumbar (L4-S1) and cervical (C4-T2) vertebrae, and consideration of his widespread age-related osteoarthritis. Read More

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http://dx.doi.org/10.1073/pnas.1820745116DOI Listing

Evaluation and Clinical Application of a Commercially Available Iterative Reconstruction Algorithm for CBCT-Based IGRT.

Technol Cancer Res Treat 2019 Jan;18:1533033818823054

1 Department of Radiation Oncology, Henry Ford Health System, Detroit, MI, USA.

Purpose:: We have quantitatively evaluated the image quality of a new commercially available iterative cone-beam computed tomography reconstruction algorithm over standard cone-beam computed tomography image reconstruction results.

Methods:: This iterative cone-beam computed tomography reconstruction pipeline uses a finite element solver (AcurosCTS)-based scatter correction and a statistical (iterative) reconstruction in addition to a standard kernel-based correction followed by filtered back-projection-based Feldkamp-Davis-Kress cone-beam computed tomography reconstruction. Standard full-fan half-rotation Head, half-fan full-rotation Head, and standard Pelvis cone-beam computed tomography protocols have been investigated to scan a quality assurance phantom via the following image quality metrics: uniformity, HU constancy, spatial resolution, low contrast detection, noise level, and contrast-to-noise ratio. Read More

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http://dx.doi.org/10.1177/1533033818823054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6373994PMC
January 2019

A Perception-driven Hybrid Decomposition for Multi-layer Accommodative Displays.

IEEE Trans Vis Comput Graph 2019 Feb 18. Epub 2019 Feb 18.

Multi-focal plane and multi-layered light-field displays are promising solutions for addressing all visual cues observed in the real world. Unfortunately, these devices usually require expensive optimizations to compute a suitable decomposition of the input light field or focal stack to drive individual display layers. Although these methods provide near-correct image reconstruction, a significant computational cost prevents real-time applications. Read More

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http://dx.doi.org/10.1109/TVCG.2019.2898821DOI Listing
February 2019

Accelerating Neutron Tomography experiments through Artificial Neural Network based reconstruction.

Sci Rep 2019 Feb 21;9(1):2450. Epub 2019 Feb 21.

Università degli Studi Milano-Bicocca, Dipartimento di Fisica "G. Occhialini", Milano, 20126, Italy.

Neutron Tomography (NT) is a non-destructive technique to investigate the inner structure of a wide range of objects and, in some cases, provides valuable results in comparison to the more common X-ray imaging techniques. However, NT is time consuming and scanning a set of similar objects during a beamtime leads to data redundancy and long acquisition times. Nowadays NT is unfeasible for quality checking study of large quantities of similar objects. Read More

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http://dx.doi.org/10.1038/s41598-019-38903-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6385317PMC
February 2019

Vascular Type of Ehlers-Danlos Syndrome: A Case Report of an Aortic Dissection During Pregnancy.

Am J Case Rep 2019 Feb 22;20:233-237. Epub 2019 Feb 22.

Clinic for Cardiology, Pneumology and Angiology, University Hospital of Düsseldorf, Düsseldorf, Germany.

BACKGROUND Vascular type of Ehlers-Danlos syndrome (vEDS) is a rare connective tissue disorder associated with a high prevalence rate of aortic dissection (AD). The coexistence of a pregnancy raises these rates and the diagnostic complexity of the situation. In this article, we present a different initial diagnostic approach to an acute aortic syndrome. Read More

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http://dx.doi.org/10.12659/AJCR.911688DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6394140PMC
February 2019

The sustained release of basic fibroblast growth factor accelerates angiogenesis and the engraftment of the inactivated dermis by high hydrostatic pressure.

PLoS One 2019 21;14(2):e0208658. Epub 2019 Feb 21.

Department of Plastic and Reconstructive Surgery, Kansai Medical University, Hirakata, Osaka, Japan.

We developed a novel skin regeneration therapy combining nevus tissue inactivated by high hydrostatic pressure (HHP) in the reconstruction of the dermis with a cultured epidermal autograft (CEA). The issue with this treatment is the unstable survival of CEA on the inactivated dermis. In this study, we applied collagen/gelatin sponge (CGS), which can sustain the release of basic fibroblast growth factor (bFGF), to the inactivated skin in order to accelerate angiogenesis. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0208658PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6383993PMC
February 2019

Formation of precisely composed cancer cell clusters using a cell assembly generator (CAGE) for studying paracrine signaling at single-cell resolution.

Lab Chip 2019 Mar;19(6):1071-1081

Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden.

The function and behaviour of any given cell in a healthy tissue, or in a tumor, is affected by interactions with its neighboring cells. It is therefore important to create methods that allow for reconstruction of tissue niches in vitro for studies of cell-cell signaling and associated cell behaviour. To this end we created the cell assembly generator (CAGE), a microfluidic device which enables the organization of different cell types into precise cell clusters in a flow chamber compatible with high-resolution microscopy. Read More

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http://xlink.rsc.org/?DOI=C8LC01153B
Publisher Site
http://dx.doi.org/10.1039/c8lc01153bDOI Listing
March 2019
3 Reads

Feasibility of reduced-dose CT of the head and neck with iterative reconstruction: a phantom and prospective clinical study.

Acta Radiol 2019 Feb 18:284185119830276. Epub 2019 Feb 18.

2 Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.

Background: There is growing concern over computed tomography (CT)-related radiation exposure, particularly in patients requiring head and neck CT due to the proximity of radiosensitive organs.

Purpose: We aimed to evaluate the feasibility of reduced-dose CT of the head and neck with iterative reconstruction in a phantom and patient study.

Material And Methods: In the phantom study, low-contrast resolution test of the American Association of Physicists in Medicine CT performance phantom was scanned to determine the lowest acceptable tube current (mAs). Read More

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http://dx.doi.org/10.1177/0284185119830276DOI Listing
February 2019

Reconstruction of high spatial resolution surface air temperature data across China: A new geo-intelligent multisource data-based machine learning technique.

Sci Total Environ 2019 May 10;665:300-313. Epub 2019 Feb 10.

Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing Normal University, Beijing 100875, China; Faculty of Geographical Science, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Earth Surface Processes and Resources Ecology, Beijing Normal University, Beijing 100875, China.

Good knowledge of the surface air temperature (SAT) is critical for scientific understanding of ecological environment changes and land-atmosphere thermodynamic interactions. However, sparse and uneven spatial distribution of the temperature gauging stations introduces remarkable uncertainties into analysis of the SAT pattern. From a geo-intelligent perspective, here we proposed a new SAT reconstruction method based on the multisource data and machine learning technique which was developed by considering autocorrelation of the in situ observed SAT in both space and time, or simply STAML, i. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.02.077DOI Listing

Fast PET preview image reconstruction, streaming, and visualization during data acquisition: a preliminary study.

J Nucl Med Technol 2019 Feb 15. Epub 2019 Feb 15.

Philips, United States.

Background and Positron emission tomography (PET) acquisition and reconstruction is time consuming. A PET preview image is commonly reconstructed at the end of data acquisition of each bed frame in the step and shoot mode. We propose a scheme to reconstruct, stream, and visualize the PET preview image during acquisition to provide a quasi real-time visual feedback. Read More

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http://dx.doi.org/10.2967/jnmt.118.218511DOI Listing
February 2019

Could the clinical effectiveness be improved under the integration of orthotic intervention and scoliosis specific exercise in managing adolescent idiopathic scoliosis? -A randomized controlled trial study.

Am J Phys Med Rehabil 2019 Feb 13. Epub 2019 Feb 13.

Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.

Objective: To compare the effectiveness of the integration of orthotic intervention (OI) and scoliosis specific exercise (SSE) with orthotic intervention only via assessing the spinal deformity, back muscle endurance and pulmonary function of the patients with adolescent idiopathic scoliosis (AIS).

Design: It is a prospective randomized controlled study. Patients who fulfilled the SRS criteria for OI were randomly assigned to the OE group (combined orthotic and exercise intervention) or the OI group (orthotic intervention only). Read More

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http://dx.doi.org/10.1097/PHM.0000000000001160DOI Listing
February 2019
1 Read
2.012 Impact Factor

[Postoperative Recurrence of Pancreatic Cancer Successfully Treated with the Gemcitabine plus Oxaliplatin Regimen Resulting in Long-Term Survival-ACase Report].

Gan To Kagaku Ryoho 2019 Jan;46(1):142-144

Dept. of Surgery, Odawara Municipal Hospital.

A 38-year-old woman who presented with complaints of back pain was diagnosed with cancer of the pancreatic body. Since invasion of the celiac artery/superior mesenteric artery was suspected, she was referred to our department for chemotherapy. She received 4 courses of gemcitabine plus S-1(GS), and she underwent distal pancreatectomy with en bloc celiac axis resection/portal vein resection/reconstruction using a left renal vein graft(OP-CAR). Read More

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January 2019
2 Reads

Early versus delayed corpectomy in thoracic and lumbar spine trauma. A long-term clinical and radiological retrospective study.

Orthop Traumatol Surg Res 2019 Feb 11. Epub 2019 Feb 11.

Orthopedic and trauma unit, Grenoble-Alpes University Hospital, 38000 Grenoble, France.

And Background Data: Many authors have demonstrated the necessity of reconstruction of the anterior column in spinal trauma with vertebral body collapse or nonunion. There is no publication comparing the result depending on the time between trauma and anterior reconstruction of the vertebral body.

Objective: To compare long-term clinical and radiological results between early and late anterior vertebral body reconstruction with expandable cages in patients with thoracic and lumbar spine trauma. Read More

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http://dx.doi.org/10.1016/j.otsr.2018.11.019DOI Listing
February 2019

Filter-Associated Inferior Vena Cava Thrombosis with Duodenal Perforation: Case Report and Literature Review.

Ann Vasc Surg 2019 Feb 11. Epub 2019 Feb 11.

Department of Thoracic and Vascular Surgery, Arnaud de Villeneuve Hospital, Montpellier, France.

Background: The aim of this article is to report a case of filter-associated inferior vena cava (IVC) thrombosis with perforation of the duodenum and penetration of a vertebral body by the filter struts.

Case Report: A 37-year-old woman with a medical history of Behcet's disease treated with corticosteroids underwent placement of a retrievable IVC filter because of recurrent iliofemoral venous thrombosis regardless of therapeutic levels of anticoagulation. Despite a correct positioning of the filter, the second follow-up computed tomography scan, performed at 1 year, showed a complete thrombosis of the infrarenal IVC segment, with perforation of the vessel wall by the filter struts and penetration in the duodenum. Read More

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http://dx.doi.org/10.1016/j.avsg.2018.11.021DOI Listing
February 2019
2 Reads

Evaluation of Adaptive Statistical Iterative Reconstruction-V Reconstruction Algorithm vs Filtered Back Projection in the Detection of Hypodense Liver Lesions: Reader Performance and Preferences.

J Comput Assist Tomogr 2019 Mar/Apr;43(2):200-205

College of Public Health, University of Nebraska Medical Center, Omaha, NE.

Objective: The aim of the study was to evaluate diagnostic accuracy and readers' experience in the detection of focal liver lesions on computed tomography with Adaptive Statistical Iterative Reconstruction-V (ASIR-V) reconstruction compared with filtered back projection (FBP) scans.

Methods: Fifty-five patients with liver lesions had FBP and ASIR-V scans. Two radiologists independently reviewed both sets of computed tomography scans, identifying and characterizing liver lesions. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000830DOI Listing
February 2019

Bilateral maxillary augmentation using CAD/CAM manufactured allogenic bone blocks for restoration of congenitally missing teeth: A case report.

J Esthet Restor Dent 2019 Feb 12. Epub 2019 Feb 12.

Private Practice, Munich, Bavaria, Germany.

Objective: Various biomaterials have been successfully applied in alveolar bone regeneration, however, the reconstruction of extensive osseous defects remains challenging and is often unfeasible with granular grafting materials. Several studies have outlined allogenic bone blocks as valid alternative to autologous block grafting.

Clinical Considerations: In this report, we demonstrate the regeneration of two large osseous defects in the maxilla with allogenic bone blocks made from human donor bone. Read More

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http://dx.doi.org/10.1111/jerd.12454DOI Listing
February 2019
1 Read

Immunobiochemical Reconstruction of Influenza Lung Infection-Melanoma Skin Cancer Interactions.

Front Immunol 2019 28;10. Epub 2019 Jan 28.

Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, United States.

It was recently reported that acute influenza infection of the lung promoted distal melanoma growth in the dermis of mice. Melanoma-specific CD8+ T cells were shunted to the lung in the presence of the infection, where they expressed high levels of inflammation-induced cell-activation blocker PD-1, and became incapable of migrating back to the tumor site. At the same time, co-infection virus-specific CD8+ T cells remained functional while the infection was cleared. Read More

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http://dx.doi.org/10.3389/fimmu.2019.00004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6360404PMC
January 2019
1 Read

Improving image quality with model-based iterative reconstruction algorithm for chest CT in children with reduced contrast concentration.

Radiol Med 2019 Feb 9. Epub 2019 Feb 9.

Department of Radiology, Imaging Center, Beijing Children's Hospital, Capital Medical University, No. 56, Nanlishi Road, Xicheng District, Beijing, 100045, China.

Objective: To evaluate model-based iterative reconstruction (MBIR) in improving the image quality of chest CT in children with reduced concentration contrast medium (CM).

Methods: Fifty-six children (median age of 4 years) who received low-dose enhanced chest CT were enrolled as the study group and compared with the control group of 56 children. Both groups used the automatic tube current modulation to achieve age-based noise index values of 11-15 HU. Read More

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http://dx.doi.org/10.1007/s11547-019-00995-0DOI Listing
February 2019

Feasibility of low-dose CT with spectral shaping and third-generation iterative reconstruction in evaluating interstitial lung diseases associated with connective tissue disease: an intra-individual comparison study.

Eur Radiol 2019 Feb 8. Epub 2019 Feb 8.

Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, 100730, China.

Objectives: To investigate the feasibility of low-dose CT (LDCT) with tin filtration and third-generation iterative reconstruction (IR) in evaluating interstitial lung diseases associated with connective tissue disease (CTD-ILD).

Methods: Fifty-three consecutive adult patients with CTD-ILD underwent regular-dose chest CT (RDCT) at 110 kVp followed by LDCT with tin-filtered 100 kVp. RDCT was reconstructed with filtered back projection (FBP) and advanced modeled iterative reconstruction (ADMIRE); LDCT was reconstructed with ADMIRE. Read More

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http://dx.doi.org/10.1007/s00330-018-5969-yDOI Listing
February 2019
1 Read

Observing Bubble Cavitation by Back-propagation of Acoustic Emission Signals.

IEEE Trans Ultrason Ferroelectr Freq Control 2019 Feb 7. Epub 2019 Feb 7.

Temporal- and spatial-resolved observations of micro-bubble cavitation generated through high-intensity ultrasound irradiation are key in improving both efficiency and efficacy of ultrasound-assisted drug delivery systems. A method of measuring bubble cavitation applying an image-reconstruction technique of back-propagation of an acoustic cavitation emission (ACE) signal is proposed. A high-intensity focused ultrasound wave (pump wave) irradiates the bubble synchronously using ultrasound recording equipment to acquire the timing of the RF signal, which is produced when the bubble radiates a secondary wave during bubble cavitation. Read More

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https://ieeexplore.ieee.org/document/8636980/
Publisher Site
http://dx.doi.org/10.1109/TUFFC.2019.2897983DOI Listing
February 2019
4 Reads

Twenty years of Mediator complex structural studies.

Biochem Soc Trans 2019 Feb 7;47(1):399-410. Epub 2019 Feb 7.

UMR 8576, Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), CNRS, Univ. Lille, F-59000 Lille, France.

Mediator is a large multiprotein complex conserved in all eukaryotes that plays an essential role in transcriptional regulation. Mediator comprises 25 subunits in yeast and 30 subunits in humans that form three main modules and a separable four-subunit kinase module. For nearly 20 years, because of its size and complexity, Mediator has posed a formidable challenge to structural biologists. Read More

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http://dx.doi.org/10.1042/BST20180608DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6393861PMC
February 2019
1 Read

Metallic artifact reduction by evaluation of the additional value of iterative reconstruction algorithms in hip prosthesis computed tomography imaging.

Medicine (Baltimore) 2019 Feb;98(6):e14341

Radiology Department, Geneva University Hospital, Genève, Switzerland.

To evaluate iterative metal artifact reduction (iMAR) technique in images data of hip prosthesis on computed tomography (CT) and the added value of advanced modeled iterative reconstruction (ADMIRE) compared with standard filtered back projection (FBP).Twenty-eight patients addressed to CT examinations for hip prosthesis were included prospectively. Images were reconstructed with iMAR algorithm in addition to FBP and ADMIRE techniques. Read More

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http://dx.doi.org/10.1097/MD.0000000000014341DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6380676PMC
February 2019
1 Read

A data-efficient method for local noise power spectrum (NPS) estimation in FDK-reconstructed 3D cone-beam CT.

Med Phys 2019 Feb 5. Epub 2019 Feb 5.

Division of Imaging, Diagnostics, and Software Reliability, Office of Science and Engineering Laboratories, CDRH, FDA, Silver Spring, MD, 20993, USA.

Purpose: For computed tomography (CT) systems in which noise is nonstationary, a local noise power spectrum (NPS) is often needed to characterize its noise property. We have previously developed a data-efficient radial NPS method to estimate the two-dimensional (2D) local NPS for filtered back projection (FBP)-reconstructed fan-beam CT utilizing the polar separability of CT NPS. In this work, we extend this method to estimate three-dimensional (3D) local NPS for feldkamp-davis-kress (FDK)-reconstructed cone-beam CT (CBCT) volumes. Read More

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http://dx.doi.org/10.1002/mp.13428DOI Listing
February 2019

Compton-based prompt gamma imaging using ordered origin ensemble algorithm with resolution recovery in proton therapy.

Sci Rep 2019 Feb 4;9(1):1133. Epub 2019 Feb 4.

Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.

Prompt gamma ray (PG) imaging based on Compton camera (CC) is promising to realize in vivo verification during the proton therapy. However, the finite spatial and energy resolution of current CC, as well as the Doppler broaden effect, degrade the quality and resolution of PG images. In addition, due to the inherent geometrical complexity of Compton camera data, PG imaging can be time-consuming and difficult to reconstruct in real-time, while using standard techniques such as filtered back-projection or maximum likelihood-expectation maximization. Read More

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http://www.nature.com/articles/s41598-018-37623-2
Publisher Site
http://dx.doi.org/10.1038/s41598-018-37623-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361882PMC
February 2019
10 Reads

Influence of iterative reconstruction and dose levels on metallic artifact reduction: A phantom study within four CT systems.

Diagn Interv Imaging 2019 Jan 29. Epub 2019 Jan 29.

Department of Radiology, CHU Nîmes, Université Montpellier, Medical Imaging Group Nîmes, EA 2415, 30029 Nîmes cedex, France.

Purpose: To compare metallic artifact reduction (MAR) algorithms proposed by four vendors according to the delivered dose and iterative level using a phantom study.

Methods: Four CT systems (Revolution GSI, Ingenuity Elite, Somatom Edge, and Aquilion Prime) equipped with MAR algorithms (Smart MAR, O-MAR, iMAR, and SEMAR) were compared. Acquisitions were performed with CIRS model 062M Phantom containing a titanium rod core insert using 120kV and two dose levels (3 and 7mGy). Read More

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http://dx.doi.org/10.1016/j.diii.2018.12.007DOI Listing
January 2019
1 Read

Associations between vertebral body fat fraction and intervertebral disc biochemical composition as assessed by quantitative MRI.

J Magn Reson Imaging 2019 Jan 30. Epub 2019 Jan 30.

Department of Orthopedic Surgery, University of California San Francisco, San Francisco, California, USA.

Background: There is an interplay between the intervertebral disc (IVD) and the adjacent bone marrow that may play a role in the development of IVD degeneration and might influence chronic lower back pain (CLBP).

Purpose: To apply novel quantitative MRI techniques to assess the relationship between vertebral bone marrow fat (BMF) and biochemical changes in the adjacent IVD.

Study Type: Prospective. Read More

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http://doi.wiley.com/10.1002/jmri.26675
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http://dx.doi.org/10.1002/jmri.26675DOI Listing
January 2019
4 Reads

Full model-based iterative reconstruction (MBIR) in abdominal CT increases objective image quality, but decreases subjective acceptance.

Eur Radiol 2019 Jan 30. Epub 2019 Jan 30.

Guilloz Imaging Department, Central Hospital, University Hospital Center of Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54035, Nancy Cedex, France.

Objective: Evaluate and compare the image quality and acceptance of a full MBIR algorithm to that of an earlier full IR hybrid algorithm and filtered back projection (FBP).

Methods: Acquisitions were performed with a 320 detector-row CT scanner with seven different dose levels. Images were reconstructed with three algorithms: FBP, full hybrid iterative reconstruction (HIR), and a full model-based iterative reconstruction algorithm (full MBIR). Read More

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http://dx.doi.org/10.1007/s00330-018-5988-8DOI Listing
January 2019

TROPOMI enables high resolution SO flux observations from Mt. Etna, Italy, and beyond.

Sci Rep 2019 Jan 30;9(1):957. Epub 2019 Jan 30.

School of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M139PL, UK.

The newly launched imaging spectrometer TROPOMI onboard the Sentinel-5 Precursor satellite provides atmospheric column measurements of sulfur dioxide (SO) and other gases with a pixel resolution of 3.5 × 7 km. This permits mapping emission plumes from a vast number of natural and anthropogenic emitters with unprecedented sensitivity, revealing sources which were previously undetectable from space. Read More

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http://dx.doi.org/10.1038/s41598-018-37807-wDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6353956PMC
January 2019

Artifact correction in low-dose dental CT imaging using Wasserstein generative adversarial networks.

Med Phys 2019 Jan 29. Epub 2019 Jan 29.

Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.

Purpose: In recent years, health risks concerning high-dose x-ray radiation have become a major concern in dental computed tomography (CT) examinations. Therefore, adopting low-dose computed tomography (LDCT) technology has become a major focus in the CT imaging field. One of these LDCT technologies is downsampling data acquisition during low-dose x-ray imaging processes. Read More

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http://dx.doi.org/10.1002/mp.13415DOI Listing
January 2019
2.635 Impact Factor

[Local Resection of Gastric Tube Cancer with a Gastrointestinal Endoscope].

Gan To Kagaku Ryoho 2018 Dec;45(13):2291-2293

Dept. of Gastrointestinal Surgery, Kanagawa Cancer Center.

An 81-year-old man with esophageal cancer had undergone subtotal thoracic esophagectomy and retrosternal reconstruction using a gastric tube. He developed anemia. Gastrointestinal endoscopy was performed, which revealed a tumor in the posterior wall of the lower part of the gastric tube. Read More

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December 2018
3 Reads

Controversies on Timing of Sex Assignment and Surgery in Individuals With Disorders of Sex Development: A Perspective.

Front Pediatr 2018 10;6:419. Epub 2019 Jan 10.

PADS DSD Program, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.

Appropriate management of disorders of sex development (DSD) has been a matter of discussion since the first guidelines were published in the 1950s. In the last decade, with the advent of the 2006 consensus, the classical methods, especially regarding timing of surgery and sex of rearing, are being questioned. In our culture, parents of DSD newborns usually want their children to undergo genital surgery as soon as possible after sexual assignment, as surgery helps them to confirm the assigned sex. Read More

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http://dx.doi.org/10.3389/fped.2018.00419DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335325PMC
January 2019

High-pitch, 120 kVp/30 mAs, low-dose dual-source chest CT with iterative reconstruction: Prospective evaluation of radiation dose reduction and image quality compared with those of standard-pitch low-dose chest CT in healthy adult volunteers.

PLoS One 2019 24;14(1):e0211097. Epub 2019 Jan 24.

Department of Radiology, Hallym University Medical Center, Hallym University Sacred Heart Hospital, Anyang-si, Gyeonggi-do, Republic of Korea.

Purpose: Objective of this study was to evaluate the effectiveness of the iterative reconstruction of high-pitch dual-source chest CT (IR-HP-CT) scanned with low radiation exposure compared with low dose chest CT (LDCT).

Materials And Methods: This study was approved by the institutional review board. Thirty healthy adult volunteers (mean age 44 years) were enrolled in this study. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0211097PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6345490PMC
January 2019
1 Read

Repair of Anterior Ear Defects Using Transcartilage Island Pedicle Flaps.

Dermatol Surg 2019 Jan 21. Epub 2019 Jan 21.

DermSurgery Associates, Houston, Texas.

Background: Surgical reconstruction of the anterior surface of the ear (concha, antihelix, scapha, and triangular fossa) is complicated by the paucity of mobile local skin.

Objective: This is a retrospective study of the transcartilage island pedicle flap for reconstruction of surgical defects of the anterior ear.

Methods And Materials: Two hundred thirty-two Mohs micrographic surgery defects were included in the study. Read More

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http://dx.doi.org/10.1097/DSS.0000000000001799DOI Listing
January 2019

Conserved sex chromosomes and karyotype evolution in monitor lizards (Varanidae).

Heredity (Edinb) 2019 Jan 22. Epub 2019 Jan 22.

Department of Ecology, Charles University, Viničná 7, 128 00, Prague, Czech Republic.

Despite their long history with the basal split dating back to the Eocene, all species of monitor lizards (family Varanidae) studied so far share the same chromosome number of 2n = 40. However, there are differences in the morphology of the macrochromosome pairs 5-8. Further, sex determination, which revealed ZZ/ZW sex microchromosomes, was studied only in a few varanid species and only with techniques that did not test their homology. Read More

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http://dx.doi.org/10.1038/s41437-018-0179-6DOI Listing
January 2019

Feasibility study of a point-of-care positron emission tomography system with interactive imaging capability.

Med Phys 2019 Jan 22. Epub 2019 Jan 22.

Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MI, 63110, USA.

Purpose: We investigated the feasibility of a novel positron emission tomography (PET) system that provides near real-time feedback to an operator who can interactively scan a patient to optimize image quality. The system should be compact and mobile to support point-of-care (POC) molecular imaging applications. In this study, we present the key technologies required and discuss the potential benefits of such new capability. Read More

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http://doi.wiley.com/10.1002/mp.13397
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http://dx.doi.org/10.1002/mp.13397DOI Listing
January 2019
4 Reads

The Application of a New Model-Based Iterative Reconstruction in Low-Dose Upper Abdominal CT.

Acad Radiol 2019 Jan 16. Epub 2019 Jan 16.

Department of Radiology, Affiliated Hospital of Shaanxi Chinese Medicine University, No. 2, Weiyang West Road, Xianyang City 712000, Shaanxi Province, China.

Rationale And Objectives: To compare upper abdominal computed tomography (CT) image quality of new model-based iterative reconstruction (MBIR) with low-contrast resolution preference (MBIR), conventional MBIR (MBIR), and adaptive statistical iterative reconstruction (ASIR) at low dose with ASIR at routine-dose.

Materials And Methods: Study included phantom and 60 patients who had initial and follow-up CT scans. For patients, the delay phase was acquired at routine-dose (noise index = 10 HU) for the initial scan and low dose (noise index = 20 HU) for the follow-up. Read More

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http://dx.doi.org/10.1016/j.acra.2018.11.020DOI Listing
January 2019
1 Read

Reconstruction of full-length circular RNAs enables isoform-level quantification.

Genome Med 2019 01 19;11(1). Epub 2019 Jan 19.

Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, 100101, China.

Currently, circRNA studies are shifting from the identification of circular transcripts to understanding their biological functions. However, such endeavors have been limited by large-scale determination of their full-length sequences and also by the inability of accurate quantification at the isoform level. Here, we propose a new feature, reverse overlap (RO), for circRNA detection, which outperforms back-splice junction (BSJ)-based methods in identifying low-abundance circRNAs. Read More

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http://dx.doi.org/10.1186/s13073-019-0614-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6339429PMC
January 2019
1 Read

Application of ASiR in combination with noise index in the chest CT examination of preschool-age children.

Radiol Med 2019 Jan 17. Epub 2019 Jan 17.

Department of Radiology of Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Critical Disorders, Chongqing, 400014, China.

Purpose: To evaluate the application of adaptive statistical iterative reconstruction (ASIR) for chest CT scans of preschool-age children.

Method: Sixty children, ages 0 to < 1, 1 to < 3, and 3 to < 6 years, who underwent CT non-contrast-enhanced and enhanced scans were included. The non-contrast-enhanced scan sequences were performed with noise indexes (NIs) of 11, 14, and 16 for the 0 to < 1, 1 to < 3, and 3 to < 6 year age groups, respectively. Read More

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http://link.springer.com/10.1007/s11547-018-00983-w
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http://dx.doi.org/10.1007/s11547-018-00983-wDOI Listing
January 2019
7 Reads

Application of Adaptive Statistical Iterative Reconstruction-V With Combination of 80 kV for Reducing Radiation Dose and Improving Image Quality in Renal Computed Tomography Angiography for Slim Patients.

Acad Radiol 2019 Jan 15. Epub 2019 Jan 15.

Affiliated Hospital of Shaanxi University of Chinese Medicine, Weiyang western road- 2#, Xianyang, Shaanxi, China 712000. Electronic address:

Objectives: To explore the application of adaptive statistical iterative reconstruction-V (ASIR-V) with combination of 80 kV for reducing radiation dose and improving image quality in renal computed tomography angiography (CTA) for slim patients compared with traditional filtered back projection (FBP) reconstruction using 120 kV.

Methods: Eighty patients for renal CTA were prospectively enrolled and randomly divided into group A and group B. Group A used 120 kV and 600 mgI/kg contrast agent and FBP reconstruction, while group B used 80 kV and 350 mgI/kg contrast agent and both FBP and ASIR-V reconstruction from 10%ASIR-V to 100%ASIR-V with 10%ASIR-V interval. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S10766332193001
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http://dx.doi.org/10.1016/j.acra.2018.12.021DOI Listing
January 2019
8 Reads