Zobrazeno 1 - 10
of 6 673
pro vyhledávání: '"gamma camera"'
Publikováno v:
University of Toronto Quarterly. Summer2021, Vol. 90 Issue 3, p661-668. 8p.
Publikováno v:
Nuclear Engineering and Technology, Vol 56, Iss 8, Pp 3188-3198 (2024)
Efficient and secure decommissioning of nuclear facilities demands advanced technologies. In this context, gamma-ray detection and imaging are crucial in identifying radioactive hotspots and monitoring radiation levels. Our study is dedicated to deve
Externí odkaz:
https://doaj.org/article/abf24725b41542a2a1e2c82f5783e731
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-23 (2024)
Abstract Background Portable gamma cameras are being developed for nuclear medicine procedures such as thyroid scintigraphy. This article introduces Seracam® – a new technology that combines small field of view gamma imaging with optical imaging
Externí odkaz:
https://doaj.org/article/0c89ab6ca7c341e8a8fd1ff8166cbd1a
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-21 (2024)
Abstract Purpose Handheld gamma cameras with coded aperture collimators are under investigation for intraoperative imaging in nuclear medicine. Coded apertures are a promising collimation technique for applications such as lymph node localization due
Externí odkaz:
https://doaj.org/article/adc9edd4133a4e839d2e31ba396314a1
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-19 (2024)
Abstract Background In image processing for activity quantification, the end goal is to produce a metric that is independent of the measurement geometry. Photon attenuation needs to be accounted for and can be accomplished utilizing spectral informat
Externí odkaz:
https://doaj.org/article/1db3cf073eff4e67ad4b47f2acf6a4bb
Publikováno v:
Nuclear Engineering and Technology, Vol 56, Iss 1, Pp 56-63 (2024)
In high radiation fields, gamma cameras suffer from pulse pile-up, resulting in poor energy resolution, count losses, and image distortion. To overcome this problem, various methods have been introduced to reduce the size of the aperture or pixel, re
Externí odkaz:
https://doaj.org/article/ec02d7a15cf14d89881c039a53833742
Publikováno v:
EJNMMI Physics, Vol 10, Iss 1, Pp 1-18 (2023)
Abstract Background Current guidelines of the radioiodine uptake (RAIU) test allow the use of different equipment, isotopes, activity and region-of-interest (ROI). We evaluated presence and extent of these differences in clinical practice and evaluat
Externí odkaz:
https://doaj.org/article/62a13561a109425d8086dfa73174fd09
Autor:
Youngmo Ku, Sehoon Choi, Jaeho Cho, Sehyun Jang, Jong Hwi Jeong, Sung Hun Kim, Sungkoo Cho, Chan Hyeong Kim
Publikováno v:
Nuclear Engineering and Technology, Vol 55, Iss 9, Pp 3140-3149 (2023)
In theory, the sharp dose falloff at the distal end of a proton beam allows for high conformal dose to the target. However, conformity has not been fully achieved in practice, primarily due to beam range uncertainty, which is approximately 4% and var
Externí odkaz:
https://doaj.org/article/24d989e2f6884c76bbf0505d66c3d7b8
Autor:
Kyuseok Kim, Youngjin Lee
Publikováno v:
Nuclear Engineering and Technology, Vol 55, Iss 7, Pp 2567-2571 (2023)
Scintillator materials are widely used in the medical and industrial fields for imaging systems using gamma cameras. In this study, image evaluation is performed by modeling a gamma camera system based on a lutetium-yttrium oxyorthosilicate (LYSO) sc
Externí odkaz:
https://doaj.org/article/64ef5d8b533c4899958d99d733db6393
Publikováno v:
EJNMMI Physics, Vol 10, Iss 1, Pp 1-17 (2023)
Abstract Background Conventional calibration of the gamma camera consists of the calculation of calibration factors (CFs) (ratio of counts/cc and true concentration activity) as the function of the volume of interest (VOI). However, such method shows
Externí odkaz:
https://doaj.org/article/6d9a95d6d5f44912afde85dbb76a99a4