抄録
Coded aperture imaging is one of emission CT techniques. It uses a gamma camera equipped with a coded aperture in place of a ordinary parallel collimator, and reconstructs three dimensional distribution of radionuclide from a projected data collected only from one direction. We have developed a small gamma camera using fully semiconductor area detectors with 16 × 16 pixels and M-array coded apertures made of a lead antimony alloy plate with 1mm thickness. This camera was designed for diagnosis of a breast cancer. In this paper, we will show you the reconstruction algorithm, design approach for coded aperture system, and some experimental results using the developed gamma camera.
