| 摘要 |
PURPOSE:To make picture data in the range of an adequate CT value and to obtain a proper picture by using other standard substances instead of water and by changing a constant according to the radiant ray absorption data. CONSTITUTION:A constant designator 10 designating a constant (k) and CPU 14 having the acquisition of corrected data and CT value arithmetic function, etc. are provided. A constant designator 10 then selects a constant (k) according to the constituent material of the body 13d to be detected and the data are sent to CPU 14 and memorized in a main memory 18. The standard material corresponding to the constant data is set in a table 13c and a control signal is transmitted to a scanner main body 13 from the CPU 14 and stored in the main memory 18 or a disc 17. The necessary scanning is then performed under the control of the CPU 14 and the constitution is made for display on a CRT display unit 21 through a picture re-constitution processing part 15, etc. Consequently the picture having a proper contrast is obtained quickly. |
