| 摘要 |
PURPOSE:To easily obtain an electronic matrix by converting a signal outputted from a tablet added with a pen-shaped optical sensor into an electronic density by means of a film density electronic density converting mechanism, and executing a mean value processing. CONSTITUTION:A data accumulating mechanism 7, which accumulates the instantaneous value of the electronic density value determined by the designation of a film density electronic density conversion designating mechanism 5 from the output signal of an A/D converter 3 for a constant time, a mean value display mechanism 8, which displays the mean value during a period from the data accumulation up to an arbitrary elapsed time, and a mechanism 11, which stores the plural mean values as an intra-contour electronic density in a prescribed tracing range, are provided. By tracing the arbitrary shape of a CT picture film with the use of a tablet 1A added with the pen-shaped optical sensor, the mean electronic density in the arbitrary shape is known, and by referring to a standard deviated value and a most frequently emerging value, the optimum electronic density is determined. Thus, the electronic density matrix can be obtained for the video on the film by a simple method. |
