Diagnostic approach of using an electron tracking compton gamma-ray camera based on small animal and phantom experiments

S Kabuki ,R Kohara,T Nagayoshi,Shunsuke Kurosawa ,O Miyasaki ,Etsuo Kunieda ,T Nakazawa ,Masashi Ueda ,Yuji Nakamoto ,Tsutomu Nakahara ,Takashi Shirahata ,Etsuji Yamamoto ,Hiroyuki Kimura ,Tomohisa Okada ,Hidekazu Kawashima ,H Nishimura ,T Tanimori ,Yoko Okada ,K Hattori ,Katsunori Ueno ,H Sekiya ,K Miuchi ,Atsushi Kubo ,Atsushi Takada ,Kaori Togashi ,Hideo Saji ,Kôichi Ogawa

doi:10.1109/nssmic.2007.4436859

Abstract

A conventional Compton camera reconstructs initial gamma-rays direction as circle. A Compton gamma-ray camera which we have developed can detect electron tracks. So our camera can reconstruct the initial gamma-rays as arc. It makes getting the low noise of image. In this paper, we report the results of three version of electron tracking camera. One is 10 x 10 x 10 cm3 Time Projection Chamber (TPC) as a scatter detector and 15 x 15 cm2 GSO pixel scintillator array (PSA) as an absorber. Second is a 10 x 10 x 10 cm3 TPC and a 10 x 10 cm2 LaBr3 PSA. The energy resolution of LaBr3 scintillator is about 2 times better than GSO scintillator. Third is a 30 x 30 x 15 cm3 TPC and a 30 x 30 cm2 GSO pixel PSA. The efficiency of this system is better than 10 cm3 cube Compton gammra-ray camera.

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