Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2004, Vol. 15 ›› Issue (6): 365


Image reconstruction from Compton scattering data

PAN Qiang-Yan1, Y. GONO2, S. MOTOMURA2, S. ENOMOTO3, Y. YANO3   

  1. 1 Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800, China;
    2 Department of Physics, Kyushu University, Fukuoka 812-8581, Japan;
    3 Cyclotron Center, RIKEN, Saitama 351-0198, Japan
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PAN Qiang-Yan, Y. GONO, S. MOTOMURA, S. ENOMOTO, Y. YANO. Image reconstruction from Compton scattering data.Nuclear Science and Techniques, 2004, 15(6): 365

Abstract: A new image reconstruction method was developed for a Compton camera. A simulation to determine a γ-ray source position was performed by using the simulation tool, GEANT4. An image reconstruction was made in two steps. First, a three dimensional image was constructed and projected in one selected plane, then the points from each ellipse was picked up by taking the peak points of a density distribution of crossing points between the ellipse and the first step image. The second step procedure improved the accuracy and the spatial resolution of a position determination significantly, comparing with the image obtained by only the first step. The accuracy and the resolution for a point source were obtained to be about 0.02 mm and (1.35±0.15) mm, respectively. The same procedure was applied to an imaging of the distributed γ-ray source.

Key words: Compton scattering event, Position sensitive germanium detector, Image reconstruction