| 摘要 |
PURPOSE:To increase the assuredness of medical diagnosis, by applying the data obtained based on a detecting signal to an input of a multiplier and a signal which produced attenuation of voltage by a dark decay in terms of time to the other input respectively to obtain a compensation data. CONSTITUTION:The set signals given from detectors 801-805 are supplied to a counter 839 from an optical scan control circuit via a signal line 383 and simultaneously with the end of an image exposure. The counter 839 transmits an address signal which varies momentarily to an ROM841, and the ROM841 applies a designated data to a multiplier 835. A signal that had the attenuation of voltage in terms of time due to a dark decay is applied to the input terminal of the other side of the multiplier 835 and stored to the ROM841 in the form of a compensation data with which a signal is obtained when no dark decay exists. In such a way, it is possible to improve the quality of a projected picture and then increase the assuredness of medical diagnosis. |
