| 摘要 |
PURPOSE:To simplify hardware required for a substantial rotating operation of contents of an image memory, by constituting so that the contents of the image memory execute its substantial rotating operation by alternately executing an inversion of 2 kinds at every specified angle. CONSTITUTION:An integrating device is constituted of a two-dimensional image memory 9 and an integrating circuit 10, and a data read out from the memory 9 and a data from a reverse projection generating circuit 2 are added by the circuit 10, and are written in the memory 9 again. By an inverting device 7 consisting of registers 11, 12, and a controlling circuit 19 of a controller 5, data are read out from 2 addresses being at symmetrical positions against the inverted axis from the memory 9, are latched once in the registers 11, 12, respectively, and these data are changed and are written to the memory 9. In this case, the inversions of 45 deg. axis and 0 deg. axis are executed alternately. In this way, reconstitution of a picture can be executed by use of only a conversion constant of 45 deg. portion, therefore, it is possible to execute easily a real time processing of reconstitution of a picture of a CT device, and also to reduce hardware. |
