マルチピンホールガンマカメラによる3次元ダイナミックイメージング技術の開発

抄録

  We proposed a dynamic 3-D gamma camera consisting of multi-pinhole collimators and flat panel detectors. Through simulation studies on various pinhole configurations we determined that from a spatial and time resolution consideration, pinhole collimators with a 60° opening angle achieved acceptable dynamic 3-D imaging results. We estimated that the camera’s basic performance features spatial and time resolution better than 3 mm and 4 seconds, respectively, for a small animal administered ^99mTc with activity of 37 MBq. We also verified the basic performance of the proposed system through preliminary experiments. From these results, we concluded that the present system would be acceptable and useful as a dynamic 3-D imager for nuclear medicine, although the problem of position calibration remained.