| 摘要 |
PROBLEM TO BE SOLVED: To set an area of an optimum CT value in each area of a tomographic image, and to clearly display each the area. SOLUTION: In this device, the CT value in a range of -1,000 to 2,000 is divided into three by operating sliders 203a, 203b to generate ranges 202a, 202b, 202c, and a luminance value of a pixel having the CT value included in the range 202a is displayed in 256 steps. When displaying a pixel having the CT value included in the range 202b, 202c, it is similarly displayed.
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