| 摘要 |
<p>A monitoring detector assembly (70) is positioned outside the scanning plane of a CT scanner to insure detection of unattenuated x-rays from the x-ray source (26) of the scanner. The monitoring detector assembly preferably provides a sequence of monitor detection measurements simultaneous with the sequential acquisition of the image data from the image detectors (28) during each projection of the scan by a filtered CT scanner. The image data are monitored using the closest in time monitor detection measurement.</p> |
