67,735 results match your criteria Image-Guided Surgery

MRI-US fusion guided prostate biopsy: how I do it.

Med Ultrason 2021 Apr 22. Epub 2021 Apr 22.

Department of Urology, Clinical Municipal Hospital and Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.

Multiparametric magnetic resonance imaging (MRI) and MRI-guided prostate biopsy have become the standard for pros-tate cancer diagnosis. As their implementation is relatively recent, experience is still limited in various centres. MRI-guided biopsy requires basic knowledge in prostate MRI and ultrasound (US), but also in the image processing protocol specific for each device. Read More

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Correction to: Radiomics score predicts acute respiratory distress syndrome based on the initial CT scan after trauma.

Eur Radiol 2021 May 4. Epub 2021 May 4.

Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria.

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The External Obturator Footprint Is a Usable, Accurate, and Reliable Landmark for Stem Depth in Direct Anterior THA.

Clin Orthop Relat Res 2021 May 4. Epub 2021 May 4.

G. Vles, J. De Mulder, S. Ghijselings, Division of Orthopaedic Surgery, Hip Unit, Gasthuisberg, University Hospitals Leuven, Leuven, Belgium.

Background: Previous CT and cadaver studies have suggested that the external obturator footprint might be used as a landmark for stem depth in direct anterior THA. Instructions on where to template this structure with small variability in height have been developed but have not been tested in daily clinical practice.

Questions/purposes: In this study we sought to investigate the (1) usability, (2) accuracy, and (3) reliability of the external obturator footprint as a landmark for stem depth in direct anterior THA. Read More

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Effect of Guiding Sleeve Design on Intraosseous Heat Generation During Implant Site Preparation (In Vitro Study).

J Prosthodont 2021 May 4. Epub 2021 May 4.

Prosthodontics Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.

Purpose: To compare the effect of different designs of guiding sleeves on heat generation during implant surgery while using different cooling fluid temperatures.

Material And Methods: Temperature measurements were performed during guided implant sites preparation in bovine rib samples using two K- type thermocouples at 2mm and 8mm depths. Three groups were tested according to guiding sleeve design; conventional cylindrical sleeve, open C-shaped sleeve, and modified cylindrical sleeve. Read More

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Quantitative fluorescence angiography aids novice and experienced surgeons in performing intestinal resection in well-perfused tissue.

Surg Endosc 2021 May 3. Epub 2021 May 3.

Department of Surgical Gastroenterology, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9 DK-2100, Copenhagen Ø, Denmark.

Background: Anastomotic leakage (AL) after gastrointestinal resection is a devastating complication with huge consequences for the patient. As AL is associated with poor blood supply, tools for objective assessment of perfusion are in high demand. Indocyanine green angiography (ICG-FA) and quantitative analysis of ICG-FA (q-ICG) seem promising. Read More

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Ethical implications of AI in robotic surgical training: A Delphi consensus statement.

Eur Urol Focus 2021 Apr 30. Epub 2021 Apr 30.

Wellcome/ESPRC Centre for Interventional and Surgical Sciences (WEISS), University College London.

Context: As the role of AI in healthcare continues to expand there is increasing awareness of the potential pitfalls of AI and the need for guidance to avoid them.

Objectives: To provide ethical guidance on developing narrow AI applications for surgical training curricula. We define standardised approaches to developing AI driven applications in surgical training that address current recognised ethical implications of utilising AI on surgical data. Read More

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Accuracy of mandibular proximal segment position using virtual surgical planning and custom osteosynthesis plates.

Int J Oral Maxillofac Surg 2021 Apr 30. Epub 2021 Apr 30.

Orthodontic Department, UWA Dental School, The University of Western Australia, Nedlands, Western Australia, Australia. Electronic address:

The purpose of this study was to determine whether the use of custom osteosynthesis plates increased the accuracy of proximal segment position following bilateral sagittal split osteotomy in a cohort of 30 patients when compared to a control group of 25 patients who had surgery with conventional plates. Surgery was performed by a single surgeon between October 2015 and December 2017. Post-surgical cone beam computed tomography scans were segmented using Mimics Innovation Suite (Materialise NV), and surface-based superimposition was achieved using ProPlan CMF (Materialise NV). Read More

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Transcavernous Resection of an Upper Clival Chondrosarcoma: "Cavernous Sinus as a Route": 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 May 3. Epub 2021 May 3.

Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Complete resection of skull base chondrosarcomas offers the potential for a durable, or even lifelong, cure and is best achieved at the first surgery.1,2 When a skull base chondrosarcoma is located at the upper clivus and in the interpeduncular cistern and invading laterally toward the petrous apex and cavernous sinus, the traditional approaches, ie, endonasal endoscopic or middle fossa approaches, are not adequate for the exposure and resection. The transcavernous sinus approach has been utilized to remove tumor from the cavernous sinus and as a corridor to the interpeduncular cistern and upper clivus, originally described for the clipping of basilar apex aneurysms. Read More

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A Single Injection of Amniotic Suspension Allograft is Safe and Effective for Treatment of Mild to Moderate Hip Osteoarthritis: A Prospective Study.

Arthroscopy 2021 Apr 30. Epub 2021 Apr 30.

Stanford University Department of Orthopaedic Surgery 450 Broadway Street M/C 6342 Redwood City, CA 94063.

Purpose: The purpose of our study was to examine the effects of a commercially available amniotic suspension allograft (ASA) (ReNu, Organogenesis, Canton, MA) in a patient population with moderate osteoarthritis of the hip.

Methods: Ten patients with symptomatic hip osteoarthritis, defined as Tonnis grade 1 or 2 on radiographic examination, were prospectively enrolled. Each patient received a single image-guided injection of ASA into the hip joint. Read More

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Fluorescence image-guided resection of intracranial meningioma: an experimental in vivo study on nude mice.

Ann Anat 2021 Apr 30:151752. Epub 2021 Apr 30.

Klinik für Neurochirurgie, Universitätsklinikum des Saarlandes, Homburg, Germany.

Introduction: The use of photodynamic agents in malignant cranial tumor surgery is quite common. For example five-aminolevulinic acid (5-ALA)-induced porphyrins in malignant gliomas are potent photosensitizers. Until today there is no comparable selective fluorescent substance available for meningiomas. Read More

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Integrated multi-modality image-guided navigation for neurosurgery: open-source software platform using state-of-the-art clinical hardware.

Int J Comput Assist Radiol Surg 2021 May 3. Epub 2021 May 3.

School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.

Purpose: Image-guided surgery (IGS) is an integral part of modern neuro-oncology surgery. Navigated ultrasound provides the surgeon with reconstructed views of ultrasound data, but no commercial system presently permits its integration with other essential non-imaging-based intraoperative monitoring modalities such as intraoperative neuromonitoring. Such a system would be particularly useful in skull base neurosurgery. Read More

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Robust Deep Learning-based Segmentation of Glioblastoma on Routine Clinical MRI Scans Using Sparsified Training.

Radiol Artif Intell 2020 Sep 30;2(5):e190103. Epub 2020 Sep 30.

Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands (R.S.E., M.v.H., M.G.W.); Department of Radiology and Nuclear Medicine, Amsterdam UMC, Location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands (M.V., F.B., H.V., J.C.d.M.); Neurosurgical Center Amsterdam, Amsterdam UMC, Location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands (D.M.J.M., P.C.D.W.H.); Institutes of Neurology & Healthcare Engineering, University College London, London, England (F.B.); Faculty of Biology, Medicine & Health, Division of Cancer Sciences, University of Manchester and Christie NHS Trust, Manchester, England (M.v.H.); Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Università degli Studi di Milano, Humanitas Research Hospital, IRCCS, Milan, Italy (L.B., M.C.N., M.R., T.S.); Department of Neurologic Surgery, University of California-San Francisco, San Francisco, Calif (M.S.B., S.H.J.); Department of Neurosurgery, Medical University Vienna, Vienna, Austria (B.K., G.W.); Department of Biomedical Imaging and Image-guided Therapy, Medical University Vienna, Vienna, Austria (J.F.); Department of Neurology & Neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands (P.A.J.T.R.); and Department of Neurologic Surgery, Hôpital Lariboisière, Paris, France (E.M.).

Purpose: To improve the robustness of deep learning-based glioblastoma segmentation in a clinical setting with sparsified datasets.

Materials And Methods: In this retrospective study, preoperative T1-weighted, T2-weighted, T2-weighted fluid-attenuated inversion recovery, and postcontrast T1-weighted MRI from 117 patients (median age, 64 years; interquartile range [IQR], 55-73 years; 76 men) included within the Multimodal Brain Tumor Image Segmentation (BraTS) dataset plus a clinical dataset (2012-2013) with similar imaging modalities of 634 patients (median age, 59 years; IQR, 49-69 years; 382 men) with glioblastoma from six hospitals were used. Expert tumor delineations on the postcontrast images were available, but for various clinical datasets, one or more sequences were missing. Read More

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September 2020

Real-time deep learning-based colorectal polyp localization on clinical video footage achievable with a wide array of hardware configurations.

Endosc Int Open 2021 May 22;9(5):E741-E748. Epub 2021 Apr 22.

Department of Gastroenterology with IBD Unit, Voivodship Hospital No 2 in Rzeszow, Rzeszów, Poland.

 Several computer-assisted polyp detection systems have been proposed, but they have various limitations, from utilizing outdated neural network architectures to a requirement for multi-graphics processing unit (GPU) processing, to validating on small or non-robust datasets. To address these problems, we developed a system based on a state-of-the-art convolutional neural network architecture able to detect polyps in real time on a single GPU and tested on both public datasets and full clinical examination recordings.  The study comprised 165 colonoscopy procedure recordings and 2678 still photos gathered retrospectively. Read More

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Automated fiducial marker detection and localization in volumetric computed tomography images: a three-step hybrid approach with deep learning.

J Med Imaging (Bellingham) 2021 Mar 28;8(2):025002. Epub 2021 Apr 28.

Medical University of Innsbruck, Department of Otorhinolaryngology, Innsbruck, Austria.

Automating fiducial detection and localization in the patient's pre-operative images can lead to better registration accuracy, reduced human errors, and shorter intervention time. Most current approaches are optimized for a single marker type, mainly spherical adhesive markers. A fully automated algorithm is proposed and evaluated for screw and spherical titanium fiducials, typically used in high-accurate frameless surgical navigation. Read More

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Mixed reality and three dimensional printed models for resection of maxillary tumor: a case report.

Quant Imaging Med Surg 2021 May;11(5):2187-2194

Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan.

In the field of oral and maxillofacial surgery, many institutions have recently begun using three-dimensional printers to create three-dimensional models and mixed reality in a variety of diseases. Here, we report the actual situation model which we made using three-dimensional printer from virtual operation data and the resection that was performed while grasping a maxillary benign tumor and neighboring three-dimensional structure by designing an application for Microsoft® HoloLens, and using Mixed Reality surgery support during the procedure. Read More

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Ridge augmentation-The new field of computerized guided surgery: A technical note for minimal-invasive bone splitting.

Clin Case Rep 2021 Apr 20;9(4):2390-2396. Epub 2021 Mar 20.

Department of Digital Technologies in Dentistry and CAD-CAM Danube Private University Krems an der Donau Austria.

Different instrumentation procedures of the alveolar ridge expansion technique (ARST) with or without Guided Bone Regeneration have proven to be effective for successful implant placement in cases of alveolar bone width between 3mm and 6mm. Conventional bone splitting techniques require flap arising. This technical note demonstrates a method for flapless guided bone splitting. Read More

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Anesthetic management for robotic hysterectomy in obese women.

Curr Opin Anaesthesiol 2021 Jun;34(3):238-245

Department of Anesthesiology, Division of Women's Anesthesia, Duke University School of Medicine, Durham, North Carolina, USA.

Purpose Of Review: Obesity is a major health epidemic, with the prevalence reaching ∼40% in the United States in recent years. It is associated with increased risk of hypertension, diabetes, heart disease, stroke, obstructive sleep apnea (OSA), and gynecologic conditions requiring surgery. Those comorbidities, in addition to the physiologic changes associated with obesity, lead to increased risk of perioperative complications. Read More

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Soft tissue-based registration of intraoral scan with cone beam computed tomography scan.

Int J Oral Maxillofac Surg 2021 Apr 28. Epub 2021 Apr 28.

3D Laboratory, Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.

The aim of this study was to evaluate a novel soft tissue-based method to register an intraoral scan (IOS) with a cone beam computed tomography (CBCT) scan. IOS and CBCT data were obtained from eight dentate patients (mean age 21±2 years; three male, five female) and 14 fully edentulous patients (mean age 56±9 years; eight male, six female). An algorithm was developed to create a soft tissue model of the CBCT scan, which allowed a soft tissue-based registration to be performed with the IOS. Read More

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Dexmedetomidine versus sufentanil as adjuvants to bupivacaine for brachial plexus block during upper extremity surgery: a randomized clinical trial.

Braz J Anesthesiol 2021 Apr 28. Epub 2021 Apr 28.

AJA University of Medical Sciences, Department of Anesthesiology, Tehran, Iran. Electronic address:

Background: Brachial plexus block (BPB) has been accepted as a reliable alternative for general anesthesia in upper limb surgeries. Adding adjuvant drugs like dexmedetomidine and sufentanil has been shown to have clinical and pharmacologic advantages. In this randomized parallel clinical trial, we aim to compare the effects of these two adjuvants for bupivacaine in BPB. Read More

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Indications and Long-Term Outcomes of Conversion of Sleeve Gastrectomy to Roux-en-Y Gastric Bypass.

Obes Surg 2021 May 1. Epub 2021 May 1.

Department of Digestive and Endocrine Surgery, University Hospital of Strasbourg, Research Institute Against Digestive Cancer (IRCAD), Institute of Image-Guided Surgery (IHU), 1 place de l'Hôpital, 67000, Strasbourg, France.

Purpose: Long-term results on sleeve gastrectomy (SG) with more than 10 years report patients needing sleeve revision for weight loss failure, de novo gastroesophageal reflux (GERD), or sleeve complications. The aim of this study was to analyze the results of laparoscopic conversion of failed SG to Roux-en-Y gastric bypass (RYGB).

Materials And Methods: Retrospective review of a prospectively institutional maintained database to identify patients who underwent conversion of SG to RYGB between 2012 and June 2020. Read More

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Hyperspectral Imaging (HSI) as a new diagnostic tool in free flap monitoring for soft tissue reconstruction: a proof of concept study.

BMC Surg 2021 Apr 30;21(1):222. Epub 2021 Apr 30.

Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany.

Objectives: Free flap surgery is an essential procedure in soft tissue reconstruction. Complications due to vascular compromise often require revision surgery or flap removal. We present hyperspectral imaging (HSI) as a new tool in flap monitoring to improve sensitivity compared to established monitoring tools. Read More

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Reduced postoperative morbidity in computer-navigated total knee arthroplasty: A retrospective comparison of 225,123 cases.

Knee 2021 Apr 27;30:148-156. Epub 2021 Apr 27.

University of Pennsylvania, Pennsylvania Hospital, Department of Orthopaedic Surgery, 800 Spruce Street, 8th Floor Preston Building, Philadelphia, PA 19107, USA.

Background: Total knee arthroplasty (TKA) is one of the most common elective surgical procedures in the United States, with more than 650,000 performed annually. Computer navigation technology has recently been introduced to assist surgeons with planning, performing, and assessing TKA bone cuts. The aim of this study is to assess postoperative complication rates after TKA performed using computer navigation assistance versus conventional methods. Read More

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An integrated augmented reality surgical navigation platform using multi-modality imaging for guidance.

PLoS One 2021 30;16(4):e0250558. Epub 2021 Apr 30.

TECHNA Institute, University Health Network, Toronto, ON, Canada.

An integrated augmented reality (AR) surgical navigation system that potentially improves intra-operative visualization of concealed anatomical structures. Integration of real-time tracking technology with a laser pico-projector allows the surgical surface to be augmented by projecting virtual images of lesions and critical structures created by multimodality imaging. We aim to quantitatively and qualitatively evaluate the performance of a prototype interactive AR surgical navigation system through a series of pre-clinical studies. Read More

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Accuracy of cervical pedicle screw placement with four different designs of rapid prototyping navigation templates: a human cadaveric study.

Comput Assist Surg (Abingdon) 2021 Dec;26(1):49-57

Department of Orthopedics, Xi'an Jiaotong University Second Affiliated Hospital, Xincheng District, Shannxi, People's Republic of China.

Purpose: Due to the high perforation rate of cervical pedicle screw placement, we have designed four different types of rapid prototyping navigation templates to enhance the accuracy of cervical pedicle screw placement.

Methods: Fifteen human cadaveric cervical spines from C2 to C7 were randomly divided into five groups, with three specimens in each group. The diameter of pedicle screw used in this study was 3. Read More

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December 2021

Endoscopic assessment of morphological and histopathological upper gastrointestinal changes after endoscopic sleeve gastroplasty.

Surg Obes Relat Dis 2021 Apr 2. Epub 2021 Apr 2.

IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France; IRCAD, Research Institute against Digestive Cancer, Strasbourg, France; Department of Digestive and Endocrine Surgery, Nouvel Hôpital Civil, Strasbourg University Hospital, Strasbourg, France.

Background: Endoscopic sleeve gastroplasty (ESG) is a promising bariatric endoluminal procedure. Restriction and shortening of the stomach are obtained by means of non-resorbable full-thickness sutures, thus inducing the formation of several endoluminal pouches in which food can stagnate. The effect of ESG on the upper gastrointestinal tract has never been investigated. Read More

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Coronary revascularization in patients with stable coronary disease and diabetes mellitus.

Diab Vasc Dis Res 2021 Mar-Apr;18(2):14791641211002469

Department of Medicine, University at Buffalo, NY, USA.

Purpose Of Study: Diabetes mellitus accelerates the development of atherosclerosis. Patients with diabetes mellitus have higher incidence and mortality rates from cardiovascular disease and undergo a disproportionately higher number of coronary interventions compared to the general population. Proper selection of treatment modalities is thus paramount. Read More

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Three-Dimensional Unified Motion Control of a Robotic Standing Wheelchair for Rehabilitation Purposes.

Sensors (Basel) 2021 Apr 27;21(9). Epub 2021 Apr 27.

Departamento de Eléctrica y Electrónica, Universidad de las Fuerzas Armadas-ESPE, Sangolquí 171103, Ecuador.

Technological advances in recent years have shown interest in the development of robots in the medical field. The integration of robotic systems in areas of assistance and rehabilitation improves the user's quality of life. In this context, this article presents a proposal for the unified control of a robotic standing wheelchair. Read More

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[F]fluoro-ethylcholine-PET Plus 4D-CT (FEC-PET-CT): A Break-Through Tool to Localize the "Negative" Parathyroid Adenoma. One Year Follow Up Results Involving 170 Patients.

J Clin Med 2021 Apr 13;10(8). Epub 2021 Apr 13.

Department of Endocrine Surgery, Endokrines Zentrum Stuttgart, Diakonie-Klinikum Stuttgart, 70176 Stuttgart, Germany.

Background: The diagnostic performance of [F]fluoro-ethylcholine-PET-CT&4D-CT (FEC-PET&4D-CT) to identify parathyroid adenomas (PA) was analyzed when ultrasound (US) or MIBI-Scan (MS) failed to localize. Postsurgical one year follow-up data are presented.

Methods: Patients in whom US and MS delivered either incongruent or entirely negative findings were subjected to FEC-PET&4D-CT and cases from July 2017 to June 2020 were analyzed, retrospectively. Read More

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Planar Body-Mounted Sensors for Electromagnetic Tracking.

Sensors (Basel) 2021 Apr 16;21(8). Epub 2021 Apr 16.

Tyndall National Institute, Dyke Parade, T12 R5CP Cork, Ireland.

Electromagnetic tracking is a safe, reliable, and cost-effective method to track medical instruments in image-guided surgical navigation. However, patient motion and magnetic field distortions heavily impact the accuracy of tracked position and orientation. The use of redundant magnetic sensors can help to map and mitigate for patient movements and magnetic field distortions within the tracking region. Read More

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Designing a SARS-CoV-2 T-Cell-Inducing Vaccine for High-Risk Patient Groups.

Vaccines (Basel) 2021 Apr 24;9(5). Epub 2021 Apr 24.

Department of Immunology, Institute for Cell Biology, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany.

We describe the results of two vaccinations of a self-experimenting healthy volunteer with SARS-CoV-2-derived peptides performed in March and April 2020, respectively. The first set of peptides contained eight peptides predicted to bind to the individual's HLA molecules. The second set consisted of ten peptides predicted to bind promiscuously to several HLA-DR allotypes. Read More

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