| 摘要 |
A scintillation camera including an arrangement for correcting for a non-linear response of scintillation. Reference correcting amounts determined during calibration mode operation are stored at lattice points in a matrix corresponding to position signals applied from a radiation position calculation circuit, position signal applied from the radiation position calculation circuit is A/D-converted every scintillation event. During a measuring mode operation, a correcting amount relating to a point on coordinates is calculated on the basis of reference correcting amount at each lattice point in a unit lattice region, the lattice points enclosing the point on coordinates which corresponds to the digitalized position signal. The correcting amount is added to position signal applied from the radiation position calculation circuit. First and second random generators are arranged to apply first and second independent random data for every scintillation event. These first and second random data are added, as lower grade bits, to X and Y components of the position signal and the correcting amount at the point on coordinates is calculated taking these added data for a detected position signal.
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