| 摘要 |
PROBLEM TO BE SOLVED: To acquire conical beam data on a beam source position corresponding to a circular part of a scan by interpolating data acquired from the beam source position on an excess spiral turn by using data acquired from a turn of a main spiral scan adjacent to it. SOLUTION: Conical beam energy passing through the vicinity of an interested area of a photographing object 12 is generated from a conical beam X-ray source 10, and energy for photographing is detected by a detector 14. A signal corresponding to sensed X-ray energy is inputted to a block 19 of a processor 18 through a data acquiring device 16, and beam data is interpolated. Next, in a block 20, conical beam data is converted into radon guiding data, and is converted into 3D inverse radon by a block 24 after being converted into polar data by a block 22. Afterwards, in a block 26, reconstituted imade data is acquired, and is supplied to a display 28, and a 3D CT image of an interested area of an object 12 is displayed. |
