Presentation Y-90 Bremsstrahlung Imaging using Compton Camera

酒井, 真理  ,  菅井, 裕之  ,  菊地, 美貴子  ,  鳥飼, 幸太  ,  荒川, 和夫  ,  山口, 充孝  ,  長尾, 悠人  ,  河地, 有木  ,  小高, 裕和  ,  国分, 紀秀  ,  武田, 伸一郎  ,  渡辺, 伸  ,  高橋, 忠幸  ,  取越, 正巳  ,  中野, 隆史

Yttrium-90 (Y-90) is almost exclusively a high-energy beta-particle emitting radionuclide used in radiotherapy. Generally, Y-90 are imaged by bremsstrahlung SPECT. However, the images demonstrate a low quality. Thus, we considered using a Compton camera. 30 MBq of Y-90 was encapsulated in a glass bottle. The bottle was set at the center of a water filled NEMA phantom. A Si/CdTe Compton camera was set under the bottle and the distance was 10 cm. Then the bremsstrahlung X-ray was measured for six hours. We found that the image quality depended on the energy window of the Compton camera. The Y-90 source was clearly imaged with 300-400 keV energy window and the spatial resolution was highest.

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