1975 年 31 巻 2 号 p. 112-114
In the clinical study using scintillation camera, the efficiency of camera must be checked before the study. One of the important parameters to decide the accuracy of the data from the camera is the uniformity of the image. In this study, a flat-field radioisotope source was developed to check the uniformity of the scintillation camera. The advantages of the flat-field source were as follows : the detector was not contaminated by the handing of this source, the vessel wall was thin, so the absorption of radioactivity by the vessel wall was decreased washing inside the vessel was easy and radioactivity did not remain in the vessel, transportation of the vessel was easy and there was little danger on damage.