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Artificial intelligence for assessment of vascular involvement and tumor resectability on CT in patients with pancreatic cancer
Springer Science and Business Media LLC - Tập 8 - Trang 1-10 - 2024
Jacqueline I. Bereska, Boris V. Janssen, C. Yung Nio, Marnix P. M. Kop, Geert Kazemier, Olivier R. Busch, Femke Struik, Henk A. Marquering, Jaap Stoker, Marc G. Besselink, Inez M. Verpalen
This study aimed to develop and evaluate an automatic model using artificial intelligence (AI) for quantifying vascular involvement and classifying tumor resectability stage in patients with pancreatic ductal adenocarcinoma (PDAC), primarily to support radiologists in referral centers. Resectability of PDAC is determined by the degree of vascular involvement on computed tomography scans (CTs), whi...... hiện toàn bộ
An MRI-guided HIFU-triggered wax-coated capsule for supertargeted drug release: a proof-of-concept study
Springer Science and Business Media LLC - Tập 3 - Trang 1-11 - 2019
Simon Matoori, Maurizio Roveri, Peter Tiefenboeck, Annatina Romagna, Olha Wuerthinger, Orpheus Kolokythas, Johannes M. Froehlich
Externally controlling and monitoring drug release at a desired time and location is currently lacking in the gastrointestinal tract. The aim of the study was to develop a thermoresponsive wax-coated capsule and to trigger its release upon applying a magnetic resonance imaging (MRI)-guided high-intensity focused ultrasound (HIFU) pulse. Capsules containing a lyophilised gadolinium-based contrast a...... hiện toàn bộ
PET/CT imaging for tumour response assessment to immunotherapy: current status and future directions
Springer Science and Business Media LLC - Tập 4 - Trang 1-13 - 2020
Marcus Unterrainer, Michael Ruzicka, Matthias P. Fabritius, Lena M. Mittlmeier, Michael Winkelmann, Johannes Rübenthaler, Matthias Brendel, Marion Subklewe, Michael von Bergwelt-Baildon, Jens Ricke, Wolfgang G. Kunz, Clemens C. Cyran
Recent immunotherapeutic approaches have evolved as powerful treatment options with high anti-tumour responses involving the patient’s own immune system. Passive immunotherapy applies agents that enhance existing anti-tumour responses, such as antibodies against immune checkpoints. Active immunotherapy uses agents that direct the immune system to attack tumour cells by targeting tumour antigens. A...... hiện toàn bộ
A machine learning approach for differentiating malignant from benign enhancing foci on breast MRI
Springer Science and Business Media LLC - Tập 4 - Trang 1-8 - 2020
Natascha C. D’Amico, Enzo Grossi, Giovanni Valbusa, Francesca Rigiroli, Bernardo Colombo, Massimo Buscema, Deborah Fazzini, Marco Ali, Ala Malasevschi, Gianpaolo Cornalba, Sergio Papa
Differentiate malignant from benign enhancing foci on breast magnetic resonance imaging (MRI) through radiomic signature. Forty-five enhancing foci in 45 patients were included in this retrospective study, with needle biopsy or imaging follow-up serving as a reference standard. There were 12 malignant and 33 benign lesions. Eight benign lesions confirmed by over 5-year negative follow-up and 15 ma...... hiện toàn bộ
Whole-body x-ray dark-field radiography of a human cadaver
Springer Science and Business Media LLC - Tập 5 - Trang 1-9 - 2021
Jana Andrejewski, Fabio De Marco, Konstantin Willer, Wolfgang Noichl, Alex Gustschin, Thomas Koehler, Pascal Meyer, Fabian Kriner, Florian Fischer, Christian Braun, Alexander A. Fingerle, Julia Herzen, Franz Pfeiffer, Daniela Pfeiffer
Grating-based x-ray dark-field and phase-contrast imaging allow extracting information about refraction and small-angle scatter, beyond conventional attenuation. A step towards clinical translation has recently been achieved, allowing further investigation on humans. After the ethics committee approval, we scanned the full body of a human cadaver in anterior-posterior orientation. Six measurements...... hiện toàn bộ
Exercise-related leg muscle signal changes: assessment using diffusion-weighted MRI
Springer Science and Business Media LLC -
Floriane Kolmer, Guillaume Bierry, Thibault Willaume
AbstractWe aimed to detect physiologic changes of leg muscle signal on magnetic resonance (MR) diffusion-weighted imaging (DWI) in asymptomatic subjects after repetitive plantar flexion exercises. In this monocentric prospective study, DWI of both legs were performed at rest and after exercise periods (5 min, Ex5: and 10 min, Ex10... hiện toàn bộ
Photon-counting detector CT-based virtual monoenergetic reconstructions: repeatability and reproducibility of radiomics features of an organic phantom and human myocardium
Springer Science and Business Media LLC - Tập 7 - Trang 1-11 - 2023
Elias V. Wolf, Lukas Müller, U. Joseph Schoepf, Nicola Fink, Joseph P. Griffith, Emese Zsarnoczay, Dhiraj Baruah, Pal Suranyi, Ismael M. Kabakus, Moritz C. Halfmann, Tilman Emrich, Akos Varga-Szemes, Jim O‘Doherty
Photon-counting detector computed tomography (PCD-CT) may influence imaging characteristics for various clinical conditions due to higher signal and contrast-to-noise ratio in virtual monoenergetic images (VMI). Radiomics analysis relies on quantification of image characteristics. We evaluated the impact of different VMI reconstructions on radiomic features in in vitro and in vivo PCD-CT datasets....... hiện toàn bộ
Effect of CT imaging on the accuracy of the finite element modelling in bone
Springer Science and Business Media LLC - - 2020
Emir Benca, Morteza Amini, Dieter H. Pahr
AbstractThe finite element (FE) analysis is a highly promising tool to simulate the behaviour of bone. Skeletal FE models in clinical routine rely on the information about the geometry and bone mineral density distribution from quantitative computed tomography (CT) imaging systems. Several parameters in CT imaging have been reported to affect the accuracy of FE mod...... hiện toàn bộ
Improved precision of noise estimation in CT with a volume-based approach
Springer Science and Business Media LLC - Tập 5 - Trang 1-7 - 2021
Hendrik Joost Wisselink, Gert Jan Pelgrim, Mieneke Rook, Ivan Dudurych, Maarten van den Berge, Geertruida H. de Bock, Rozemarijn Vliegenthart
Assessment of image noise is a relevant issue in computed tomography (CT). Noise is routinely measured by the standard deviation of density values (Hounsfield units, HU) within a circular region of interest (ROI). We explored the effect of a spherical volume of interest (VOI) on noise measurements. Forty-nine chronic obstructive pulmonary disease patients underwent CT with clinical protocol (regul...... hiện toàn bộ
Multiparametric prostate MRI quality assessment using a semi-automated PI-QUAL software program
Springer Science and Business Media LLC - Tập 5 - Trang 1-8 - 2021
Francesco Giganti, Sydney Lindner, Jonathan W. Piper, Veeru Kasivisvanathan, Mark Emberton, Caroline M. Moore, Clare Allen
The technical requirements for the acquisition of multiparametric magnetic resonance imaging (mpMRI) of the prostate have been clearly outlined in the Prostate Imaging Reporting and Data System (PI-RADS) guidelines, but there is still huge variability in image quality among centres across the world. It has been difficult to quantify what constitutes a good-quality image, and a first attempt to add...... hiện toàn bộ
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