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Proceedings Paper

Use of scattered radiation in radioisotope imaging
Author(s): Nagaaki Ohyama; Yoichi Kanai; Masahiro Mimura; Masahiro Yamaguchi
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Paper Abstract

Scattered radiation in radioisotope imaging is considered in an estimation of radioactivity distribution in order to improve the image quality. To utilize the scattered components in the estimation, an observation system was modeled for each energy window, and Monte Carlo technique was applied for modeling photon transport in a water-filled cylinder. The observation system was assumed to have 8 energy windows between 90 keV and 154 keV for photons emitted by 99mTc, and in order to clearly show the contribution of scattered components, it was also assumed to collect only one view projection data. In computer simulations, generalized analytic reconstruction from discrete samples (GARDS) was applied to estimate the source distribution, and the results show that when a large number of photons are collected, scattered components could improve the image quality.

Paper Details

Date Published: 8 May 1995
PDF: 8 pages
Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208334
Show Author Affiliations
Nagaaki Ohyama, Tokyo Institute of Technology (Japan)
Yoichi Kanai, Tokyo Institute of Technology (Japan)
Masahiro Mimura, Tokyo Institute of Technology (Japan)
Masahiro Yamaguchi, Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 2432:
Medical Imaging 1995: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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