Use of scattered radiation in radioisotope imaging

Nagaaki Ohyama; Yoichi Kanai; Masahiro Mimura; Masahiro Yamaguchi

doi:10.1117/12.208334

8 May 1995 Use of scattered radiation in radioisotope imaging

Nagaaki Ohyama, Yoichi Kanai, Masahiro Mimura, Masahiro Yamaguchi

Proceedings Volume 2432, Medical Imaging 1995: Physics of Medical Imaging; (1995) https://doi.org/10.1117/12.208334
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

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.

Citation Download Citation

Nagaaki Ohyama, Yoichi Kanai, Masahiro Mimura, and Masahiro Yamaguchi "Use of scattered radiation in radioisotope imaging", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); https://doi.org/10.1117/12.208334

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