Results 61 to 70 of about 5,344,290 (172)

Radiobiological studies with monoenergetic neutrons [PDF]

, 1973
The Radiological Research Accelerator Facility (RARAF) has the capability of producing essentially monoenergetic neutron beams, ranging in energy from 16.4 MeV down to 220 keV.
Rossi, H. H., Kellerer, Albrecht M., Goodman, L. J., Marino, S., Hall, E. J.   +4 more
core   +1 more source

Dual-energy CT pulmonary angiography using dual-flow mixture bolus tracking: potential for contrast medium and radiation exposure reduction

Insights into Imaging
Objectives To assess the feasibility and image quality of a bolus tracking protocol with dual-flow mixture for contrast medium volume and radiation dose reduction in dual-energy CT pulmonary angiography (CTPA).
Mingjue Jian, Lisheng Huang, Chenxi Zhang, Xiang Qin, Haixia Li, Jiafang Wu, Mingwang Chen, Li Ding, Xiaomei Li, Yikai Xu, Zhao Chen, Chenggong Yan   +11 more
doaj   +1 more source

Impact of dose allocation between high‐ and low‐kV scans on virtual monoenergetic image quality in developmental dual‐energy cone‐beam CT for image‐guided radiotherapy

Journal of Applied Clinical Medical Physics, Volume 27, Issue 5, May 2026.
Abstract Background Dual‐energy cone‐beam CT (DE‐CBCT) offers potential as an advanced imaging technique for image‐guided radiation therapy (IGRT) through the production of virtual monoenergetic images (VMI). CBCT‐VMI can show enhanced image quality, with improved CNR and reduced nonuniformity artifacts, compared to polychromatic images.
Andrew Keeler, Luke Layman, Ha Nguyen, Jason Luce, Mathias Lehmann, John C. Roeske, Hyejoo Kang   +6 more
wiley   +1 more source

Advances in the diagnosis of abdominal disease based on virtual monoenergetic imaging and iodine map of spectral CT [PDF]

Zhenduanxue lilun yu shijian
Computed tomography (CT) is one of the most commonly used examination methods in clinical practice, but its resolution for soft-tissue is not high enough, making it difficult to detect and identify some lesions, and it is insufficient in quantitative ...
ZHANG Tianyi, YAN Fuhua
doaj   +1 more source

Comparative evaluation of the Mayo Clinic Florida microdosimetric kinetic model and mMKM for carbon ion treatment planning: A matRad‐based analysis

Journal of Applied Clinical Medical Physics, Volume 27, Issue 5, May 2026.
Abstract Purpose Modeling relative biological effectiveness (RBE) is central to carbon ion radiotherapy treatment planning. The modified Microdosimetric Kinetic Model (mMKM) is a clinically established RBE framework that has guided treatment protocols at many existing carbon centers, while the Mayo Clinic Florida Microdosimetric Kinetic Model (MCF MKM)
Shannon Hartzell, Sridhar Yaddanapudi, Keith M. Furutani, Alessio Parisi, Xiaoying Liang, Chunjoo Park, Bo Lu, Jun Tan, Lisa Seckler, Remo Cristoforetti, Taku Inaniwa, Niklas Wahl, Chris J. Beltran   +12 more
wiley   +1 more source

Research Progress on Reducing Metal Artifacts in CT Imaging

CT Lilun yu yingyong yanjiu
Intracranial aneurysm embolization, oral metal implants, spinal internal fixation, hip replacement, and other metal implants are increasingly used in clinical practice. Metal artifacts generated by computed tomography (CT) images during the evaluation of
Danyang SU, Ping HOU, Haoran ZHANG, Yuanbo MA, Jinlong LIU, Xiaopeng YANG   +5 more
doaj   +1 more source

Dual-energy CT-based virtual monoenergetic imaging via unsupervised learning

Physical and Engineering Sciences in Medicine
Abstract Since its development, virtual monoenergetic imaging (VMI) derived from dual-energy computed tomography (DECT) has been shown to be valuable in many clinical applications. However, DECT-based VMI showed increased noise at low keV levels. In this study, we proposed an unsupervised learning method to generate VMI from DECT.
Chi-Kuang, Liu, Hui-Yu, Chang, Hsuan-Ming, Huang   +2 more
openaire   +2 more sources

Spectral deep learning‐based patient and bowtie scatter correction for clinical photon‐counting CT

Medical Physics, Volume 53, Issue 5, May 2026.
Abstract Background The presence of scatter in computed tomography degrades image quality, and can be caused by the patient and by other components in the beam path, such as the bowtie filter. While conventional energy‐integrating detectors do not provide spectral distinction, photon‐counting (PC) detectors are energy‐selective and provide spectral ...
Lukas Hennemann, Julien Erath, Andreas Heinkele, Eric Fournié, Martin Petersilka, Karl Stierstorfer, Marc Kachelrieß   +6 more
wiley   +1 more source

Accurate iodine quantification and residual error reduction with principal component analysis multimaterial decomposition using spectral CT

Medical Physics, Volume 53, Issue 4, April 2026.
Abstract Background Multimaterial decomposition (MMD) in dual‐energy CT enables iodine quantification, critical for diagnostic applications. However, residual errors from noniodine materials in iodine maps limit accuracy, especially in complex thoracic regions and low‐dose settings.
Hamidreza Khodajou‐Chokami, Huanjun Ding, Sabee Molloi   +2 more
wiley   +1 more source

Conventional and spectral- CT for renal cell carcinoma thermal ablation: A case report

Radiology Case Reports
Dual-energy or spectral computed tomography (CT) information may be obtained by either sending X-ray beams of different energy spectra through the patient or by discriminating the energy of the X-rays that reach the detector.
Juna Musa, MD, MSc, Ahmad Parvinian, MD, Nathan Huber, PhD, Andrea Ferrero, PhD, Christopher Favazza, PhD, Anil Kurup, MD, Thomas Atwell, MD   +6 more
doaj   +1 more source