Results 141 to 150 of about 20,368 (248)

Predicting ventilation from single breathing phase non‐contrast CT using Swin Transformers

Medical Physics, Volume 53, Issue 4, April 2026.
Abstract Background Pulmonary ventilation imaging enables functional avoidance radiotherapy treatment plans by quantifying regional lung function. However, current clinical standards, such as 99𝑚Tc‐based single‐photon emission computed tomography (SPECT), rely on radioactive tracers, which can introduce imaging deposition artifacts.
Yi‐Kuan Liu, Hsu‐Ting Kuo, Alaa Melek, Richard Castillo, Yevgeniy Vinogradskiy, Lili Zhao, Girish Nair, Edward Castillo   +7 more
wiley   +1 more source

Impact of partial volume correction on radiomics reproducibility in theranostic SPECT/CT imaging

Medical Physics, Volume 53, Issue 4, April 2026.
Abstract Background: Radiomics has shown potential for quantitative characterization of tumors in molecular imaging; however, its clinical translation in theranostic 177Lu SPECT/CT remains limited due to poor robustness of extracted features to reconstruction variability and partial volume effects.
Mohammad Saber Azimi, Maryam Cheraghi, Mohammad Ali Ghodsi Rad, Mohadeseh Bayat, Maryam Alhashim, Habibollah Dadgar, Mahmoud Alabedi, Nahid Ibrahim, Enas Alwuhaib, Hossein Arabi, Arman Rahmim, Habib Zaidi   +11 more
wiley   +1 more source

Automatic Respiratory and Bulk Patient Motion Corrected 3D Fetal MRI

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 1972-1985, April 2026.
ABSTRACT Purpose To develop a framework (ACROBATIC) for correcting motion in 3D radial fetal MRI. Methods Data were simulated (N = 200) and acquired in utero (N = 11, gestational age: 32 ± 2 weeks). Motion due to maternal respiration was estimated by extracting a self‐gating signal and applying focused navigation. Bulk motion was estimated by splitting
Robin Ferincz, Leonor Alamo, Aurelio Secinaro, Estelle Tenisch, Aurélien Bustin, Davide Piccini, Milan Prša, Jérôme Yerly, Christopher W. Roy   +8 more
wiley   +1 more source

Overlap‐Kernel EPI: Estimating MRI Shot‐to‐Shot Phase Variations by Shifted‐Kernel Extraction From Overlap Regions at Arbitrary k‐Space Locations

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2131-2152, April 2026.
ABSTRACT Purpose In multi‐shot EPI, shot‐dependent phase fluctuations can introduce ghost artifacts, undermining advantages for enhancing resolution or reducing distortion, particularly in diffusion scans. Here, a novel self‐navigation strategy based on shift‐invariant kernel extraction is proposed, enabling robust estimation of phase inconsistencies ...
Rui Tian, Martin Uecker, Maxim Zaitsev, Klaus Scheffler   +3 more
wiley   +1 more source

Restoration of Non-Uniform Motion-Blurred Star Images Based on Dynamic Strip Attention. [PDF]

J Imaging
Han J, Niu Z, He J.
europepmc   +1 more source

Free‐Breathing, 3D Cardiac Magnetic Resonance Elastography for Myocardial Stiffness Mapping

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2356-2369, April 2026.
ABSTRACT Purpose Magnetic resonance elastography (MRE) of the heart has predominantly utilized breath‐held acquisitions with limited anatomic coverage. This work investigates the feasibility of 3D, free‐breathing cardiac MRE. Methods A 3D hybrid radial and EPI acquisition is utilized and combined with retrospective binning of k‐space via physiologic ...
Nolan K. Meyer, Yi Sui, Jessica Magnuson, Phillip J. Rossman, Kevin J. Glaser, Matthew C. Murphy, Armando Manduca, Ian C. Chang, Kiaran P. McGee, Kejal Kantarci, Ekta Kapoor, Philip A. Araoz, Richard L. Ehman, Joshua D. Trzasko, Arvin Arani   +14 more
wiley   +1 more source

GS-MSDR: Gaussian Splatting with Multi-Scale Deblurring and Resolution Enhancement. [PDF]

Sensors (Basel)
Wan F, Ding S, Li T, Lei G, Xu L, Ming T.   +5 more
europepmc   +1 more source

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

Fortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

Testing Hypotheses of Covariate Effects on Topics of Discourse

Statistical Analysis and Data Mining: An ASA Data Science Journal, Volume 19, Issue 2, April 2026.
ABSTRACT We introduce an approach to topic modeling with document‐level covariates that remains tractable in the face of large text corpora. This is achieved by de‐emphasizing the role of parameter estimation in an underlying probabilistic model, assuming instead that the data come from a fixed but unknown distribution whose statistical functionals are
Gabriel Phelan, David A. Campbell
wiley   +1 more source

Image Deblurring via Frequency-Domain Feature Enhanced Convolutional Neural Networks. [PDF]

Sensors (Basel)
Guo Y, Ma L, Zhang Y.
europepmc   +1 more source