| 摘要 |
PURPOSE:To make a tomographic image from recostitution easy to see by varying the data correction of a density value of each picture element of the tomographic image according to the radiation absorptivity of an object. CONSTITUTION:Fan-beam X rays FB from an X-ray source 2 are exposed to pulsatively at specific intervals of time and a rack 1 is rotated through a driving device 7 by a specific angle every time exposure is performed, for example, once. The intensity of the incident X rays is detected by a detector 3. This detection is carried out synchronously with the synchronizing signal that a data collecting device 4 outputs. Then, the collecting device 4 converts the detection output from analog to digital and the conversion output is inputted as X-ray absorption data to a computation control unit 5. Thus, data are collected while the projection direction of X rays is changed successively. The unit 5 reconstitutes an image of the tomographic surface of a body A to be inspected on the basis of the collected data and displays it on a display device 6. Here, the computation control unit 5 reconstitutes the image of the tomographic surface of the body A according to algorithm. Thus, the tomographic image after reconstitution is made easy to see. |
