| 摘要 |
PURPOSE:To select and exchange a collimator with sensitivity and resolution corresponding to the integration of RI (radioactive isotope) by inputting by designation a various kinds of selection conditions for the collimator corresponding to the integration of the RI. CONSTITUTION:Plural kinds of collimators A, B with sensitivity and resolution suitable for the integration of the RI are designated selectively by relating to a temporal element corresponding to the integration of the RI. The condition for the selection of the collimator is inputted from a keyboard 28. For example, the collimator A with high initial sensitivity and the intermediate sensitivity collimator B are used by superimposing when the RI is sufficiently integrated. Then, a signal to select the collimator is sent from a CPU 72 to travel mechanisms 18, 19, and the mechanisms 18, 19 travel the collimator mutually, and a selected collimator is arranged on the detecting plane of a radiation detector 2. Thus, the selection and arrangement of the collimator can be performed even when the number of count of radiant rays is varied by the automatic exchange of the collimator.
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