| 摘要 |
PURPOSE:To collect the scintigram by an arbitrary enlargement ratio by setting an arbitrary position as a reference position by providing an enlarging circuit having a multiplier and a subtracter controlled by a CPU circuit between a position counting circuit and a collection control circuit. CONSTITUTION:Only that which is made incident vertically in gamma rays radiated from an RI (radioactive isotope) in a body to be inspected is allowed to pass through by a collimator 1, converted to an electric signal by a detector 2, and its incident position is calculated by a position calculating circuit 3. This position signal is compressed in accordance with a format by a collection control circuit 5, a scintigram generated by a collection memory circuit 6 by an instruction of the circuit 5 is read out by a display circuit 7 and a display signal is generated, by which the scintigram is displayed by a display device 8 and the circuits 5, 7 are controlled by a CPU circuit 9. In this case, between the circuit 3 and the circuit 5, an enlarging circuit 4 having a multiplier and a subtracter controlled by the circuit 9 is provided. Next, a position signal of incident gamma rays outputted by the circuit 3 is enlarged in an arbitrary reference position and by an arbitrary enlargement ratio.
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