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KMID : 0384620090200020051
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Korean Journal of Medical Physics
2009 Volume.20 No. 2 p.51 ~ p.61
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Preliminary Study on Performance Evaluation of a Stacking-structure Compton Camera by Using Compton Imaging Simulator
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Lee Se-Hyung
Park Sung-Ho
Seo Hee
Park Jin-Hyung
Kim Chan-Hyeong
Lee Ju-Hahn
Lee Chun-Sik
Lee Jae-Sung
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Abstract
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A Compton camera, which is based on the geometrical interpretation of Compton scattering, is a very promising gamma-ray imaging device considering its several advantages over the conventional gamma-ray imaging devices: high imaging sensitivity, 3-D imaging capability from a fixed position, multi-tracing functionality, and almost no limitation in photon energy. In the present study, a Monte Carlo-based, user-friendly Compton imaging simulator was developed in the form of a graphical user interface (GUI) based on Geant4 and MATLABTM. The simulator was tested against the experimental result of the double-scattering Compton camera, which is under development at Hanyang University in Korea. The imaging resolution of the simulated Compton image well agreed with that of the measured image. The imaging sensitivity of the measured data was 2∼3 times higher than that of the simulated data, which is due to the fact that the measured data contains the random coincidence events. The performance of a stacking-structure type Compton camera was evaluated by using the simulator. The result shows that the Compton camera shows its highest performance when it uses 4 layers of scatterer detectors.
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KEYWORD
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Compton camera, Simulator, Monte carlo, Geant4
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