| 摘要 |
PURPOSE: To reduce a calculation amount requiring the image reproduction of an object in a computerized tomograph method for which an angle is limited by scanning the object over a limited angle range and gathering a projection value in a utilizable observation angle. CONSTITUTION: An X-ray source 35 scans the object 36 in the limited angle range and the grid of X-rays transmitted through the object 36 is detected by the array of X-ray detectors 37. Gathered signals indicate the projection value of the object 36 in the limited angle range and it is sent to a computer 38. Measured X-ray data for which the angle is limited are inputted to image reproduction algorithm 39 for which the angle is limited. To the other input 40 of the computer 38, the outer side boundary of the object and the upper limit and lower limit of the density are supplied. Then, by the reproduction algorithm for which the angle is limited, the object 36 and composite images are reproduced and displayed at a display device 44. |
