| 摘要 |
<p>PURPOSE:To allow the absorption and correction of ordinary data with high accuracy by mounting a radioactive isotope material (RI) for correction on holding mechanisms provided at about the focus point of a structure which turns together with a focus collimator and obtaining correction data. CONSTITUTION:The head part pH of a person P to be inspected is first put into a hole 3 and plate-shaped RI containers for correction 12-1 to 12-3 housing an aq. soln. of 99mTc, etc., which are RI are mounted on the holding mechanisms 11-1 to 11-3. A rotary frame 6 is turned 120 deg. and gamma rays are detected with 360 deg. direction. Reconstitution processing is then executed to obtain the correction distribution image for the purpose of gamma ray correction. The containers 12-1 to 123 are then removed from the mechanisms 11-1 to 11-3 and the RI drug is dosed to the person P to be inspected. The gamma rays are similarly detected with the 360 deg. direction and the reconstitution processing is executed to obtain the SPCECT image before the correction. This image is subjected to the correction by using the correction distribution image in a data processing section. The SPECT image is obtd. after the correction and is displayed. The inspection efficiency is improved by the simple correction operation in this way and since the correction data of the high accuracy is obtd. by the positions of the containers 12-1 to 12-3, the SPECT image having the high accuracy is obtd.</p> |
