| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten the time required for whole-body SPECT(single photon emission computer tomography) examination. SOLUTION: Gamma rays radiated from a radioisotope administered to a subject P are detected by rotating an Anger-type camera 10 on the subject P and moving it in the direction of the body axis X to obtain tomographic suintigrams. In this case, a collimator 150 to be mounted to the camera 10 is inclined in such a way that radiation transmitting holes 15a are perpendicular to the direction of the horizontal axis Z which intersects the direction of the body axis X of the subject P at right angles, have acute angels as they are widened from the center to the direction of the body axis X to the direction of the body axis X of the subject P, and are formed in such a way as to have a virtual focus (f) on the side of a radiation detector. By this constitution, the width W of the field of view is widened in the direction of the body axis X of the subject P, it is possible to collect a wide range of data efficiently to reduce the amount of data to be collected, and the time required for examinations is shortened.</p> |
