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Portable head CT motion artifact correction via diffusion-based generative model.
Comput Med Imaging Graph
December 2024
Center for Advanced Medical Computing and Analysis, Massachusetts General Hospital and Harvard Medical School, Boston, United States. Electronic address:
Portable head CT images often suffer motion artifacts due to the prolonged scanning time and critically ill patients who are unable to hold still. Image-domain motion correction is attractive for this application as it does not require CT projection data. This paper describes and evaluates a generative model based on conditional diffusion to correct motion artifacts in portable head CT scans.
View Article and Find Full Text PDFImproved deep learning-based IVIM parameter estimation via the use of more "realistic" simulated brain data.
Med Phys
December 2024
Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen, Fujian, China.
Background: Due to the low signal-to-noise ratio (SNR) and the limited number of b-values, precise parameter estimation of intravoxel incoherent motion (IVIM) imaging remains an open issue to date, especially for brain imaging where the relatively small difference between D and D easily leads to outliers and obvious graininess in estimated results.
Purpose: To propose a synthetic data driven supervised learning method (SDD-IVIM) for improving precision and noise robustness in IVIM parameter estimation without relying on real-world data for neural network training.
Methods: On account of the absence of standard IVIM parametric maps from real-world data, a novel model-based method for generating synthetic human brain IVIM data was introduced.
Simulation and quantitative evaluation of three surgical techniques of endoscopic enucleation of prostate on a realistic phantom model.
World J Urol
December 2024
Department of Urology, University of Freiburg Medical Center, Freiburg, Germany.
Objective: To evaluate the impact of three different AEEP techniques on the training performance of novices using a realistic hydrogel prostate phantom model.
Material And Methods: The experimental setup utilized realistic prostate phantom model provided by the Max Planck Institute for Intelligent Systems, Germany. For the enucleation, we utilized a new solid-state pulsed thulium laser (Thulio®, Dornier MedTech, Weßling, Germany).
Feasibility of relaxation along a fictitious field in the 2nd rotating frame (T) mapping in the human myocardium at 3 T.
Front Cardiovasc Med
December 2024
Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States.
Purpose: Evaluate the feasibility of quantification of Relaxation Along a Fictitious Field in the 2nd rotating frame (RAFF2) relaxation times in the human myocardium at 3 T.
Methods: mapping was performed using a breath-held ECG-gated acquisition of five images: one without preparation, three preceded by RAFF2 trains of varying duration, and one preceded by a saturation prepulse. Pixel-wise maps were obtained after three-parameter exponential fitting.
How to enhance the novices' learning in ultrasound-guided procedures utilizing handmade phantoms?
BMC Med Educ
December 2024
Department of Emergency Medicine, National Taiwan University Hospital and National Taiwan University, No.7, Chung-Shan South Road, Taipei, 100, Taiwan.
Introduction: This prospective study aims to evaluate the learning effect of US-guided thoracocentesis and pericardiocentesis in novices through simulation training using handmade phantoms.
Methods: The novices included undergraduate-year (UGY) students and first postgraduate-year (PGY-1) residents. Handmade phantoms were utilized for training and immediate assessment.
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