Search
Results: 583
On the capacity and superposition of minima in neural network loss function landscapes
Abstract
Minima of the loss function landscape (LFL) of a neural network are locally optimal sets of weights that extract and process information from the input data to make...
CT colonography
Christian Bräuer, Philippe Lefere, Stefaan Gryspeerdt, Helmut Ringl, Ali Al-Mukhtar, Paul Apfaltrer, Dominik Berzaczy, Barbara Füger, Julia Furtner, Christina Müller-Mang, Matthias Pones, Martina Scharitzer, Ramona Woitek, Anno Graser, Michael Weber, Thomas Mang
Dec 20, 2018
OBJECTIVES: To assess whether electronic cleansing (EC) of tagged residue and different computed tomography (CT) windows influence the size of colorectal polyps in CT colonography (CTC). METHODS: A database of 894...
CT colonography Cancer screening Colonic Polyps Neoplasms colorectal Virtual colonoscopy Aged Algorithms Analysis of Variance Colonic Polyps Colonography Computed Tomographic Female Humans Image Processing Computer-Assisted Male Middle Aged Reference Standards Retrospective Studies Sensitivity and Specificity
Binary Classification of COVID-19 CT Images Using CNN
COVID-19 pandemic has hit the world with such a force that the world's leading economies are finding it challenging to come out of it. Countries with the best medical facilities are even cannot handle the increasing number of...
Published by: IGI Global Scientific Publishing
Mitral Valve Imaging with CT
Jonathan R Weir-McCall, Philipp Blanke, Christopher Naoum, Victoria Delgado, Jeroen J Bax, Jonathon Leipsic
Dec 20, 2018
The role of noninvasive imaging to help guide transcatheter aortic valvular interventions is well established and has grown with the advances in the procedure. With the rapid development of new transcatheter mitral valve...
Interpreting CT perfusion in stroke.
CT perfusion images can be rapidly obtained on all modern CT scanners and easily incorporated into an acute stroke imaging protocol. Here we discuss the technique of CT perfusion imaging, how to interpret the data and how it can...
CT Characteristics of Pheochromocytoma
Letizia Canu, Janna AW Van Hemert, Michiel N Kerstens, Robert P Hartman, Aakanksha Khanna, Ivana Kraljevic, Darko Kastelan, Corin Badiu, Urszula Ambroziak, Antoine Tabarin, Magalie Haissaguerre, Edward Buitenwerf, Anneke Visser, Massimo Mannelli, Wiebke Arlt, Vasileios Chortis, Isabelle Bourdeau, Nadia Gagnon, Marie Buchy, Francoise Borson-Chazot, Timo Deutschbein, Martin Fassnacht, Alicja Hubalewska-Dydejczyk, Marcin Motyka, Ewelina Rzepka, Ruth T Casey, Benjamin G Challis, Marcus Quinkler, Laurent Vroonen, Ariadni Spyroglou, Felix Beuschlein, Cristina Lamas, William F Young, Irina Bancos, Henri JLM Timmers
Apr 16, 2019
BACKGROUND: Up to 7% of all adrenal incidentalomas (AIs) are pheochromocytomas (PCCs). In the evaluation of AI, it is generally recommended that PCC be excluded by measurement of plasma-free or 24-hour urinary fractionated...
Chest CT in patients after lung transplantation
Alexander Wressnegger, Helmut Prosch, Bernhard Moser, Walter Klepetko, Peter Jaksch, Christopher Lambers, Konrad Hoetzenecker, Christian Schestak, Albert De Bettignies, Lucian Beer, Georg Apfaltrer, Helmut Ringl, Paul Apfaltrer
Apr 03, 2020
OBJECTIVES: The purpose of this study was to investigate the impact of a 150kV spectral filtration chest imaging protocol (Sn150kVp) combined with advanced modeled iterative reconstruction (ADMIRE) on radiation dose and image...
Algorithms Female Humans Image Processing Computer-Assisted Lung Diseases Lung Transplantation Male Middle Aged Radiation Dosage Radiographic Image Enhancement Radiographic Image Interpretation Computer-Assisted Radiography Thoracic Retrospective Studies Signal-To-Noise Ratio tin Tomography X-Ray Computed
CT-guided vs. fluoroscopically guided transforaminal epidural steroid injections for lumbar radiculopathy
Jozef PM Kamp, Jonathan Bartlett, Amr Fahmy, Kendrick To, Rumana Hossain, Maheswara Akula
Apr 17, 2023
INTRODUCTION: There are no formal guidelines for whether CT-guided or fluoroscopy-guided TFESI should be undertaken for patients with symptoms of lumbar nerve root irritation and corresponding nerve impingement. Here, we sought...
Fractional Flow Reserve Derived from CT
Fractional flow reserve derived from CT is a rapidly developing technique, with an increasing burden of literature supporting its potential role in the workup of patients suspected of having coronary artery disease.
AI-Assisted CT as a Clinical and Research Tool for COVID-19.
Zion Tsz Ho Tse, Sierra Hovet, Hongliang Ren, Tristan Barrett, Sheng Xu, Baris Turkbey, Bradford J Wood
Oct 13, 2021
There is compelling support for widening the role of computed tomography (CT) for COVID-19 in clinical and research scenarios. Reverse transcription polymerase chain reaction (RT-PCR) testing, the gold standard for COVID-19...
3D deformable registration of longitudinal abdominopelvic CT images using unsupervised deep learning.
Maureen van Eijnatten, Leonardo Rundo, K Joost Batenburg, Felix Lucka, Emma Beddowes, Carlos Caldas, Ferdia A Gallagher, Evis Sala, Carola-Bibiane Schönlieb, Ramona Woitek
Jul 12, 2021
BACKGROUND AND OBJECTIVES: Deep learning is being increasingly used for deformable image registration and unsupervised approaches, in particular, have shown great potential. However, the registration of abdominopelvic Computed...
Common pitfalls and recommendations for using machine learning to detect and prognosticate for COVID-19 using chest radiographs and CT scans
Michael Roberts, Derek Driggs, Matthew Thorpe, Julian Gilbey, Michael Yeung, Stephan Ursprung, Angelica I. Aviles-Rivero, Christian Etmann, Cathal McCague, Lucian Beer, Jonathan R. Weir-McCall, Zhongzhao Teng, Effrossyni Gkrania-Klotsas, James H. F. Rudd, Evis Sala, Carola-Bibiane Schönlieb, Alessandro Ruggiero, Anna Korhonen, Emily Jefferson, Emmanuel Ako, Georg Langs, Ghassem Gozaliasl, Guang Yang, Helmut Prosch, Jacobus Preller, Jan Stanczuk, Jing Tang, Johannes Hofmanninger, Judith Babar, Lorena Escudero Sánchez, Muhunthan Thillai, Paula Martin Gonzalez, Philip Teare, Xiaoxiang Zhu, Mishal Patel, Conor Cafolla, Hojjat Azadbakht, Joseph Jacob, Josh Lowe, Kang Zhang, Kyle Bradley, Marcel Wassin, Markus Holzer, Kangyu Ji, Maria Delgado Ortet, Tao Ai, Nicholas Walton, Pietro Lio, Samuel Stranks, Tolou Shadbahr, Weizhe Lin, Yunfei Zha, Zhangming Niu
Mar 18, 2021
Abstract: Machine learning methods offer great promise for fast and accurate detection and prognostication of coronavirus disease 2019 (COVID-19) from standard-of-care chest radiographs (CXR) and chest computed tomography (CT)...
Pancreatic allograft thrombosis
A Hakeem, J Chen, S Iype, MR Clatworthy, CJE Watson, EM Godfrey, S Upponi, K Saeb-Parsy
Nov 30, 2017
Pancreatic allograft thrombosis (PAT) remains the leading cause of nonimmunologic graft failure. Here, we propose a new computed tomography (CT) grading system of PAT to identify risk factors for allograft loss and outline a...
clinical research/practice coagulation and hemostasis complication Graft Survival health services and outcomes research pancreas/simultaneous pancreas-kidney transplantation thrombosis and thromboembolism Adolescent Adult Algorithms Allografts Child Female Follow-Up Studies Graft Rejection Graft Survival Humans Male Middle Aged Pancreas Transplantation Postoperative Complications Prognosis Retrospective Studies Risk Factors Thrombosis Tomography X-Ray Computed Young Adult
Integration of proteomics with CT-based qualitative and radiomic features in high-grade serous ovarian cancer patients
Lucian Beer, Hilal Sahin, Nicholas W. Bateman, Ivana Blazic, Hebert Alberto Vargas, Harini Veeraraghavan, Justin Kirby, Brenda Fevrier-Sullivan, John B. Freymann, C. Carl Jaffe, James Brenton, Maura Miccó, Stephanie Nougaret, Kathleen M. Darcy, G. Larry Maxwell, Thomas P. Conrads, Erich Huang, Evis Sala
Jul 07, 2020
Abstract: Objectives: To investigate the association between CT imaging traits and texture metrics with proteomic data in patients with high-grade serous ovarian cancer (HGSOC). Methods: This retrospective, hypothesis-generating...
CT imaging prior to transcatheter aortic valve implantation in the UK.
Iwan Harries, Jonathan R Weir-McCall, Michelle C Williams, James Shambrook, Giles Roditi, Russel Bull, Gareth J Morgan-Hughes, Edward D Nicol, Alastair J Moss
Sep 28, 2020
OBJECTIVE: This cross-sectional observational study sought to describe variations in CT in the context of transcatheter aortic valve implantation (CT-TAVI) as currently performed in the UK. METHODS: 408 members of the British...
CT scanning aortic valve disease percutaneous valve therapy Aortic Valve Cross-Sectional Studies Health Care Surveys Healthcare Disparities Heart Valve Diseases Hospitals High-Volume Hospitals Low-Volume Humans Practice Patterns Physicians' Predictive Value of Tests Radiation Dosage Radiation Exposure Tomography X-Ray Computed transcatheter aortic valve replacement United Kingdom
Novel three-dimensional bone ‘mapping’ software can help assess progression of osseous metastases from routine CT
Imaging of bone metastasis response to therapy is a research priority. Stradwin is a new software-tool, with demonstrated sub-voxel accuracy in assessing cortical bone properties from routine CT. We applied this technology to...
4D perfusion CT of prostate cancer for image-guided radiotherapy planning
Lucian Beer, Stephan H Polanec, Pascal AT Baltzer, Georg Schatzl, Dietmar Georg, Christian Schestak, Anja Dutschke, Harald Herrmann, Peter Mazal, Alexander K Brendel, Shahrokh F Shariat, Helmut Ringl, Thomas H Helbich, Paul Apfaltrer
Feb 03, 2020
PURPOSE: Advanced forms of prostate cancer (PCa) radiotherapy with either external beam therapy or brachytherapy delivery techniques aim for a focal boost and thus require accurate lesion localization and lesion segmentation for...
Aged Biopsy Large-Core Needle Contrast Media Diffusion Magnetic Resonance Imaging Feasibility Studies Four-Dimensional Computed Tomography Humans Image-guided biopsy Male Middle Aged Neoplasm Grading Perfusion Imaging Proof of Concept Study Prospective Studies Prostate Prostatic Neoplasms Radiation Dosage Radiotherapy Planning Computer-Assisted Radiotherapy Image-Guided
CT Image Detection of Pulmonary Tuberculosis Based on the Improved Strategy YOLOv5
Jing Liu, Haojie Xie, Mingli Lu, Ye Li, Bing Wang, Zhaogang Sun, Wei He, Limin Wen, Dailun Hou
Jan 01, 2023
The diagnosis of pulmonary tuberculosis is a complicated process with a long wait. According to the WS 288-2017 standard, PTB can be divided into five types of imaging. To date, no relevant studies on PTB CT images based on the...
Published by: IGI Global Scientific Publishing
Impact of solitary pulmonary nodule size on qualitative and quantitative assessment using 18F-fluorodeoxyglucose PET/CT
JR Weir-McCall, S Harris, KA Miles, NR Qureshi, RC Rintoul, S Dizdarevic, L Pike, Heok K Cheow, Fiona J Gilbert, Sputnik investigators
May 11, 2021
PURPOSE: To compare qualitative and semi-quantitative PET/CT criteria, and the impact of nodule size on the diagnosis of solitary pulmonary nodules in a prospective multicentre trial. METHODS: Patients with an SPN on CT ≥ 8 and...
cost-effectiveness DCE-CT Diagnostic accuracy trial Diagnostic Imaging Lung cancer PET/CT Solitary pulmonary nodule (SPN) Fluorodeoxyglucose F18 Humans Lung Neoplasms Positron Emission Tomography Computed Tomography Positron-Emission Tomography Prospective Studies Radiopharmaceuticals Retrospective Studies Solitary pulmonary nodule
Integration of proteomics with CT-based qualitative and radiomic features in high-grade serous ovarian cancer patients
Lucian Beer, Hilal Sahin, Nicholas W. Bateman, Ivana Blazic, Hebert Alberto Vargas, Harini Veeraraghavan, Justin Kirby, Brenda Fevrier-Sullivan, John B. Freymann, C. Carl Jaffe, James Brenton, Maura Miccó, Stephanie Nougaret, Kathleen M. Darcy, G. Larry Maxwell, Thomas P. Conrads, Erich Huang, Evis Sala
Apr 06, 2021
Abstract: Objectives: To investigate the association between CT imaging traits and texture metrics with proteomic data in patients with high-grade serous ovarian cancer (HGSOC). Methods: This retrospective, hypothesis-generating...
Neurologically asymptomatic cerebral oligometastatic prostate carcinoma metastasis identified on [Ga]Ga-THP-PSMA PET/CT
Abstract: Background: Brain metastases from prostate cancer are rare and usually only occur in the context of widespread systemic disease. This is the first case report of a solitary brain oligometastasis, in a neurologically...
Novel three-dimensional bone ‘mapping’ software can help assess progression of osseous metastases from routine CT
Imaging of bone metastasis response to therapy is a research priority. Stradwin is a new software-tool, with demonstrated sub-voxel accuracy in assessing cortical bone properties from routine CT. We applied this technology to...
Correlating Radiomic Features of Heterogeneity on CT with Circulating Tumor DNA in Metastatic Melanoma.
Andrew B Gill, Leonardo Rundo, Jonathan CM Wan, Doreen Lau, Jeries P Zawaideh, Ramona Woitek, Fulvio Zaccagna, Lucian Beer, Davina Gale, Evis Sala, Dominique-Laurent Couturier, Pippa G Corrie, Nitzan Rosenfeld, Ferdia A Gallagher
Nov 18, 2020
Clinical imaging methods, such as computed tomography (CT), are used for routine tumor response monitoring. Imaging can also reveal intratumoral, intermetastatic, and interpatient heterogeneity, which can be quantified using...
Determinants of Rejection Rate for Coronary CT Angiography Fractional Flow Reserve Analysis.
Gianluca Pontone, Jonathan R Weir-McCall, Andrea Baggiano, Alberico Del Torto, Laura Fusini, Marco Guglielmo, Giuseppe Muscogiuri, Andrea Igoren Guaricci, Daniele Andreini, Manesh Patel, Koen Nieman, Takashi Akasaka, Campbell Rogers, Bjarne L Nørgaard, Jeroen Bax, Gilbert L Raff, Kavitha Chinnaiyan, Daniel Berman, Timothy Fairbairn, Lynne Hurwitz Koweek, Jonathon Leipsic
Sep 10, 2019
Background Coronary artery fractional flow reserve (FFR) derived from CT angiography (FFTCT) enables functional assessment of coronary stenosis. Prior clinical trials showed 13%-33% of coronary CT angiography studies had...
|
|< |
< |
1 |