| 摘要 |
PURPOSE:To attain efficient picture recording by changing a picture recording time interval in response to the change speed when a picture change such as movement of a contrast medium in an object exists. CONSTITUTION:A video signal of an X-ray fluoroscopic image by an image pickup device 1 is sent to a picture memory 3 and a binary-coded circuit 5 via an AD converter 2. A data for one frame's share is stored in buffer memories 71-73 while being switched into a proper frame number, read at each picture cell, inputted to a difference circuit 10, the 2-frame pictures are compared at each picture cell of the same position, the cell number taking a different value is counted by a discrimination circuit 11. When the count exceeds a predetermined value, the discrimination circuit 11 gives the output to a picture memory controller 4 to control the storage in the picture memory 3. The efficient picture data is recorded at a time interval suitable for the speed of blood flow. |
