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https://www.readbyqxmd.com/read/28205308/fast-and-robust-multimodal-image-registration-using-a-local-derivative-pattern
#1
Dongsheng Jiang, Yonghong Shi, Xinrong Chen, Manning Wang, Zhijian Song
PURPOSE: Deformable multimodal image registration, which can benefit radiotherapy and image guided surgery by providing complementary information, remains a challenging task in the medical image analysis field due to the difficulty of defining a proper similarity measure. This article presents a novel, robust and fast binary descriptor, the discriminative local derivative pattern (dLDP), which is able to encode images of different modalities into similar image representations. METHODS: dLDP calculates a binary string for each voxel according to the pattern of intensity derivatives in its neighborhood...
February 2017: Medical Physics
https://www.readbyqxmd.com/read/28190372/training-performance-of-laparoscopic-surgery-in-two-and-three-dimensional-displays
#2
Chiuhsiang Joe Lin, Chih-Feng Cheng, Hung-Jen Chen, Kuan-Ying Wu
INTRODUCTION: This research investigated differences in the effects of a state-of-art stereoscopic 3-dimensional (3D) display and a traditional 2-dimensional (2D) display in simulated laparoscopic surgery over a longer duration than in previous publications and studied the learning effects of the 2 display systems on novices. METHODS: A randomized experiment with 2 factors, image dimensions and image sequence, was conducted to investigate differences in the mean movement time, the mean error frequency, NASA-TLX cognitive workload, and visual fatigue in pegboard and circle-tracing tasks...
February 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28180096/the-frozen-elephant-trunk-technique-european-association-for-cardio-thoracic-surgery-position-and-bologna-experience
#3
REVIEW
Luca Di Marco, Antonio Pantaleo, Alessandro Leone, Giacomo Murana, Roberto Di Bartolomeo, Davide Pacini
Complex lesions of the thoracic aorta are traditionally treated in 2 surgical steps with the elephant trunk technique. A relatively new approach is the frozen elephant trunk (FET) technique, which potentially allows combined lesions of the thoracic aorta to be treated in a 1-stage procedure combining endovascular treatment with conventional surgery using a hybrid prosthesis. These are very complex and time-consuming operations, and good results can be obtained only if appropriate strategies for myocardial, cerebral, and visceral protection are adopted...
February 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28139285/guided-modern-endodontic-surgery-a-novel-approach-for-guided-osteotomy-and-root-resection
#4
Georg D Strbac, Albrecht Schnappauf, Katharina Giannis, Andreas Moritz, Christian Ulm
INTRODUCTION: Continuous improvements in techniques, instruments, and materials have established modern endodontic microsurgery as a state-of-the-art treatment method. The purpose of this approach was to introduce a new surgical endodontic technique by using a three-dimensional printed template for guided osteotomy and root resection. METHODS: A 38-year-old patient was diagnosed with periapical lesions of teeth #3 and #4 and extruded gutta-percha material. Three-dimensional radiographic and optical scan files were imported into surgical planning software designed for guided implant surgery...
January 28, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28135033/reverse-thermal-gel-for-in-utero-coverage-of-spina-bifida-defects-an-innovative-bioengineering-alternative-to-open-fetal-repair
#5
Ahmed I Marwan, Sarah M Williams, James R Bardill, Jane Gralla, Noraishah M Abdul-Aziz, Daewon Park
Current state-of-the-art management of open spina bifida defects entails an open fetal surgery approach associated with significant morbidities. In an attempt to reduce these risks and provide for an earlier minimally invasive repair, it is aimed to develop and characterize an innovative alternative using a unique reverse thermal gel. This study focuses on characterization of the physical and biological properties of the polymer and its in vivo applicability. Based on the knowledge and benchmarking, the "ideal" biomaterial should have the following characteristics: stability in amniotic fluid, limited permeability, biocompatibility, biologically functional, nontoxic, ability to support cellular functions, and in vivo applicability...
January 30, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28113236/accurate-physics-based-registration-for-the-outcome-validation-of-minimal-invasive-interventions-and-open-liver-surgeries
#6
Cristina Laura, Klaus Drechsler, Stefan Wesarg, Reto Bale
OBJECTIVE: The purpose of this paper is to present an outcome validation tool for tumor radio frequency ablation and resection. METHODS: Intervention assessment tools require an accurate registration of both pre- and postoperative computed tomographies able to handle big deformations. Therefore, a physics based method is proposed with that purpose. To increase the accuracy both automatically detected internal and surface physical landmarks are incorporated in the registration process...
April 27, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28113190/accurate-physics-based-registration-for-the-outcome-validation-of-minimal-invasive-interventions-and-open-liver-surgeries
#7
Cristina Oyarzun Laura, Klaus Drechsler, Stefan Wesarg, Reto Bale
OBJECTIVE: The purpose of this paper is to present an outcome validation tool for tumor radiofrequency (RF) ablation and resection. METHODS: Intervention assessment tools require an accurate registration of both pre- and postoperative computed tomographies able to handle big deformations. Therefore, a physics-based method is proposed with that purpose. To increase the accuracy both automatically detected internal and surface physical landmarks are incorporated in the registration process...
February 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28110832/identifying-key-outcome-metrics-in-pancreatic-surgery-and-how-to-optimally-achieve-them
#8
EDITORIAL
Claudio Bassi, Stefano Andrianello
BACKGROUND: Indicators of effectiveness and quality of care are of greatest importance in gauging the direct benefit of a new surgical technique, such as minimally-invasive pancreatic resections, when being compared with established approaches. METHODS: Current expert opinion on minimally-invasive pancreatic resection (MIPR) was presented at the first MIPR state of the art conference during 12th world congress of the International Hepato-Pancreato-Biliary Association...
January 16, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28105610/antithyroid-drug-induced-agranulocytosis-state-of-the-art-on-diagnosis-and-management
#9
Nuno Vicente, Luís Cardoso, Luísa Barros, Francisco Carrilho
Agranulocytosis is a rare but serious complication of antithyroid drug therapy, and an up-to-date understanding of this topic is important. Both direct toxicity and immune-mediated responses have been described as possible mechanisms. Some major susceptibility loci have recently been identified, which may lead the diagnosis of agranulocytosis into a genomic era. Onset is acute and patients present with symptoms and signs of infection together with high fever. Clinical suspicion is pivotal and should prompt blood sampling...
January 19, 2017: Drugs in R&D
https://www.readbyqxmd.com/read/28074785/deformable-registration-of-ct-and-cone-beam-ct-with-local-intensity-matching
#10
Seyoun Park, William Plishker, Harry Quon, John Wong, Raj Shekhar, Junghoon Lee
Cone-beam CT (CBCT) is a widely used intra-operative imaging modality in image-guided radiotherapy and surgery. A short scan followed by a filtered-backprojection is typically used for CBCT reconstruction. While data on the mid-plane (plane of source-detector rotation) is complete, off-mid-planes undergo different information deficiency and the computed reconstructions are approximate. This causes different reconstruction artifacts at off-mid-planes depending on slice locations, and therefore impedes accurate registration between CT and CBCT...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28060703/a-dataset-and-benchmarks-for-segmentation-and-recognition-of-gestures-in-robotic-surgery
#11
Narges Ahmidi, Lingling Tao, Shahin Sefati, Yixin Gao, Colin Lea, Benjamin Bejar, Luca Zappella, Sanjeev Khudanpur, Rene Vidal, Gregory D Hager
OBJECTIVE: State-of-the-art techniques for surgical data analysis report promising results for automated skill assessment and action recognition. The contributions of many of these techniques, however, are limited to study-specific data and validation metrics, making assessment of progress across the field extremely challenging. METHODS: In this paper, we address two major problems for surgical data analysis: (1) lack of uniform shared datasets and benchmarks and (2) lack of consistent validation processes...
January 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28059854/perforator-phase-contrast-angiography-of-deep-inferior-epigastric-perforators-a-better-preoperative-imaging-tool-for-flap-surgery-than-computed-tomographic-angiography
#12
Xiangyu Yang, Michael J Miller, Harry T Friel, Allison Slijepcevic, Michael V Knopp
OBJECTIVE: The aim of this study was to demonstrate the feasibility of in vivo perforator visualization by a newly proposed magnetic resonance-based perforator phase contrast angiography (pPCA) technique for deep inferior epigastric perforator (DIEP) flap surgery and to prospectively compare its image quality and clinical value with computed tomographic angiography (CTA), the state-of-the-art perforator imaging technique. MATERIALS AND METHODS: Institutional review board approval and informed consent were obtained...
January 4, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28054328/magnetoencephalography-and-new-imaging-modalities-in-epilepsy
#13
REVIEW
Jessica Falco-Walter, Christian Owen, Mishu Sharma, Christopher Reggi, Mandy Yu, Travis R Stoub, Michael A Stein
The success of epilepsy surgery is highly dependent on correctly identifying the entire epileptogenic region. Current state-of-the-art for localizing the extent of surgically amenable areas involves combining high resolution three-dimensional magnetic resonance imaging (MRI) with electroencephalography (EEG) and magnetoencephalography (MEG) source modeling of interictal epileptiform activity. Coupling these techniques with newer quantitative structural MRI techniques, such as cortical thickness measurements, however, may improve the extent to which the abnormal epileptogenic region can be visualized...
January 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28049604/evaluating-tumour-after-care-in-oral-squamous-cell-carcinoma-insights-into-patients-health-related-quality-of-life
#14
Oliver Bissinger, Andrea Rau, Steffen Koerdt, Klaus-Dietrich Wolff, Marco Rainer Kesting, Carolin Götz
INTRODUCTION: Tumour aftercare (tac) is an essential tool in oncology. The main aim of these follow ups is to diagnose recurrence and second tumours from the beginning. Tac appointments can create a special environment for patients' further concerns. The purpose of the current study was to evaluate tac of patients diagnosed with OSCC and to investigate their health related quality of life (hrql). MATERIAL AND METHODS: A German questionnaire was created by two maxillo-facial surgeons with several years of tac experience...
December 9, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28048500/we-h-202-04-advanced-medical-image-registration-techniques
#15
G Christensen
: Deformable image registration has now been commercially available for several years, with solid performance in a number of sites and for several applications including contour and dose mapping. However, more complex applications have arisen, such as assessing response to radiation therapy over time, registering images pre- and post-surgery, and auto-segmentation from atlases. These applications require innovative registration algorithms to achieve accurate alignment. The goal of this session is to highlight emerging registration technology and these new applications...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048394/we-h-202-00-session-in-memory-of-jean-pouliot-next-generation-deformable-image-registration
#16
Geoffrey Hugo
: Deformable image registration has now been commercially available for several years, with solid performance in a number of sites and for several applications including contour and dose mapping. However, more complex applications have arisen, such as assessing response to radiation therapy over time, registering images pre- and post-surgery, and auto-segmentation from atlases. These applications require innovative registration algorithms to achieve accurate alignment. The goal of this session is to highlight emerging registration technology and these new applications...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047749/we-h-202-01-memorial-introduction
#17
N Kirby
: Deformable image registration has now been commercially available for several years, with solid performance in a number of sites and for several applications including contour and dose mapping. However, more complex applications have arisen, such as assessing response to radiation therapy over time, registering images pre- and post-surgery, and auto-segmentation from atlases. These applications require innovative registration algorithms to achieve accurate alignment. The goal of this session is to highlight emerging registration technology and these new applications...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047096/we-h-202-02-biomechanical-modeling-of-anatomical-response-over-the-course-of-therapy
#18
K Brock
: Deformable image registration has now been commercially available for several years, with solid performance in a number of sites and for several applications including contour and dose mapping. However, more complex applications have arisen, such as assessing response to radiation therapy over time, registering images pre- and post-surgery, and auto-segmentation from atlases. These applications require innovative registration algorithms to achieve accurate alignment. The goal of this session is to highlight emerging registration technology and these new applications...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046433/we-h-202-03-accounting-for-large-geometric-changes-during-radiotherapy
#19
G Hugo
: Deformable image registration has now been commercially available for several years, with solid performance in a number of sites and for several applications including contour and dose mapping. However, more complex applications have arisen, such as assessing response to radiation therapy over time, registering images pre- and post-surgery, and auto-segmentation from atlases. These applications require innovative registration algorithms to achieve accurate alignment. The goal of this session is to highlight emerging registration technology and these new applications...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28034649/is-vaginal-mesh-a-stimulus-of-autoimmune-disease
#20
Bilal Chughtai, Art Sedrakyan, Jialin Mao, Karyn S Eilber, Jennifer T Anger, J Quentin Clemens
OBJECTIVE: We sought to investigate a potential link between the development of systemic/autoimmune disorders and synthetic polypropylene mesh repairs. STUDY DESIGN: New York State Department of Health Statewide Planning and Research Cooperative System data were utilized to conduct this retrospective cohort study. Adult women undergoing surgery for pelvic organ prolapse with vaginally implanted mesh from January 2008 through December 2009 in inpatient and ambulatory surgery settings in New York State were identified...
December 26, 2016: American Journal of Obstetrics and Gynecology
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