Results 21 to 30 of about 493,079 (334)

Image quality comparisons of coil setups in 3T MRI for brain and head and neck radiotherapy simulations

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza, Jeffrey P. Guenette, Christian V. Guthier, Steven Hatch, Alexander Marques, Lisa Singer, Jonathan D. Schoenfeld   +6 more
wiley   +1 more source

Investigation on the Background Radiation of Abakaliki Rice Mill in Ebonyi State, Nigeria

Atom Indonesia, 2021
This study investigated the background ionizing radiation of Abakaliki rice mills. The requirement to monitor this site is because the prevalent activities in the site suggest that it is a source of ionizing radiation.
A. Nwachukwu, F. C. Ikeagwuani, A. O. Adeboje   +2 more
doaj   +1 more source

Application value of contrast‐enhanced ultrasound in preoperative localization of microwave ablation for primary hyperparathyroidism

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Background Ultrasonography (US) and 99mTechnetium‐sestamibi scintigraphy (99mTc‐MIBI) are currently first‐line imaging modalities to localize parathyroid adenomas with sensitivities of 80% and 84%, respectively. Therefore, finding other modalities to further improve the diagnostic accuracy for preoperative localization is critically needed ...
Fangyi Liu, Li Zang, Yunlin Li, Zhiwei Guan, Yang Liu, Xiaoling Yu, Zhiyu Han, Ping Liang   +7 more
wiley   +1 more source

Effect of different noise reduction techniques and template matching parameters on markerless tumor tracking using dual‐energy imaging

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To evaluate the impact of various noise reduction algorithms and template matching parameters on the accuracy of markerless tumor tracking (MTT) using dual‐energy (DE) imaging. Methods A Varian TrueBeam linear accelerator was used to acquire a series of alternating 60 and 120 kVp images (over a 180° arc) using fast kV switching, on ...
Mandeep Kaur, Peter Wagstaff, Hassan Mostafavi, Mathias Lehmann, Daniel Morf, Liangjia Zhu, Hyejoo Kang, Michal Walczak, Matthew M. Harkenrider, John C. Roeske   +9 more
wiley   +1 more source

Искажение радиационного фона городской среды вследствие агрессивного влияния техносферы. 1 этап: радон и альфа-фон

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2020
Работа посвящена проверка возможности замены промышленно выпускаемых радиометров радона более экономичными детекторами альфа- и/или бета-излучения для проведения круглогодичного и периодического мониторинга радона в городской атмосфере. Выявлена значимая
Яковлев, Г.А., Яковлева, В.С.   +1 more
doaj   +1 more source

Decoherence in the cosmic background radiation [PDF]

Classical and Quantum Gravity, 2011
15 pages, accepted to be published in Classical and Quantum ...
Franco, Mariano Andrés, Calzetta, Esteban Adolfo   +1 more
openaire   +4 more sources

Digital radiography image quality evaluation using various phantoms and software

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To investigate the effect of the exposure parameters on image quality (IQ) metrics of phantom images, obtained automatically using software or from visual evaluation. Methods Three commercial phantoms and a homemade phantom constructed according to the instructions given in the IAEA Human Health Series No.
Ioannis A. Tsalafoutas, Shady AlKhazzam, Virginia Tsapaki, Huda AlNaemi, Mohammed Hassan Kharita   +4 more
wiley   +1 more source

Light bending in radiation background [PDF]

Journal of Cosmology and Astroparticle Physics, 2014
We consider the velocity shift of light in presence of radiation emitted by a black body. Within geometric optics formalism we calculate the bending angle of a light ray when there is a gradient in the energy density. We model the bending for two simplified cases.
Kim, Jin Young, Lee, Taekoon
openaire   +3 more sources

Progress in biological and medical research in the deep underground: an update

Frontiers in Public Health, 2023
As the growing population of individuals residing or working in deep underground spaces for prolonged periods, it has become imperative to understand the influence of factors in the deep underground environment (DUGE) on living systems.
Yuhao Zou, Yuhao Zou, Ling Wang, Jirui Wen, Juan Cheng, Can Li, Zhizhen Hao, Zhizhen Hao, Jian Zou, Jian Zou, Mingzhong Gao, Mingzhong Gao, Weimin Li, Jiang Wu, Heping Xie, Heping Xie, Jifeng Liu, Jifeng Liu   +17 more
doaj   +1 more source

The cosmic microwave background radiation [PDF]

Physics Reports, 2000
We summarize the theoretical and observational status of the study of the Cosmic Microwave Background radiation. Its thermodynamic spectrum is a robust prediction of the Hot Big Bang cosmology and has been confirmed observationally. There are now 76 observations of Cosmic Microwave Background anisotropy, which we present in a table with references.
Eric Gawiser, Joseph Silk, Joseph Silk
openaire   +3 more sources