| 摘要 |
<p>PROBLEM TO BE SOLVED: To optimally set main windows and sub-windows by setting the windows by counting the photons the energy of which exists in main windows at every incident position based on energy signals and position signals outputted from a gamma camera and performing scattered-ray correction. SOLUTION: Image memories 4A-4C are provided correspondingly to three systems of window circuits 2A-2C and address signals are supplied to the memories 4A-4C from an image controller 3. The main controller 3 supplies the address signals corresponding to X-Y signals upon receiving pulses from the window circuits 2A-2C and, after a photographing period ends, the photons the energy of which exists in main windows are counted at every incident position and image data are collected. The collected image data are supplied to image processors 5A-5C. After the image data are corrected for scattered rays by means of a scattered-ray correction processor 6, the image data are set in three systems of windows by means of a window setting circuit 7.</p> |
