TY - GEN
T1 - Study of gamma radiation transfer through collimator in nuclear medicine applications
AU - Gurko, M. A.
AU - Konovalov, A. N.
AU - Prigarin, S. M.
N1 - Funding Information:
The work was partially supported by RFBR grants No. 19-02-00244 and ʋ 17-52-14004.
Publisher Copyright:
© 2021 Author(s).
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/5/24
Y1 - 2021/5/24
N2 - The point spread function (PSF) plays an important role in methods such as single photon emission computed tomography (SPECT). This function is most often approximated using the Gaussian distribution, as a convenient to use function. In this work a geometric model was developed that allows to estimate the intensity distribution of the gamma quantum flux from a point source after passing through the collimator. When developing this model, it was noticed that the approximation of the PSF by the Gaussian function is not always qualitative. So, for example, at distances of 200-300 mm to the source, the approximation by the Gaussian function can be called accurate, in contrast to other cases. Also, a software package based on the Monte Carlo method was developed, which makes it possible to obtain images of a spot from a point source by SPECT. Only a small discrepancy was found between the Monte Carlo spot size and the geometric model data. These discrepancies are related taking into account the distance between the collimator and the detector.
AB - The point spread function (PSF) plays an important role in methods such as single photon emission computed tomography (SPECT). This function is most often approximated using the Gaussian distribution, as a convenient to use function. In this work a geometric model was developed that allows to estimate the intensity distribution of the gamma quantum flux from a point source after passing through the collimator. When developing this model, it was noticed that the approximation of the PSF by the Gaussian function is not always qualitative. So, for example, at distances of 200-300 mm to the source, the approximation by the Gaussian function can be called accurate, in contrast to other cases. Also, a software package based on the Monte Carlo method was developed, which makes it possible to obtain images of a spot from a point source by SPECT. Only a small discrepancy was found between the Monte Carlo spot size and the geometric model data. These discrepancies are related taking into account the distance between the collimator and the detector.
UR - http://www.scopus.com/inward/record.url?scp=85107214247&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/47ace23e-0d95-324a-b06c-ab22a52cd461/
U2 - 10.1063/5.0052205
DO - 10.1063/5.0052205
M3 - Conference contribution
AN - SCOPUS:85107214247
SN - 9780735440999
T3 - AIP Conference Proceedings
BT - International Conference on the Methods of Aerophysical Research, ICMAR 2020
A2 - Fomin, Vasily M.
A2 - Shiplyuk, Alexander
PB - American Institute of Physics Inc.
T2 - 20th International Conference on the Methods of Aerophysical Research, ICMAR 2020
Y2 - 1 November 2020 through 7 November 2020
ER -