| 摘要 |
A tomography data acquisition system in which the signal processing of signals from a radiation detector is a function of the angular position of the detector relative to a center path from the radiation source through the center of a tomography subject, and which results in system hardware savings. The information content of detector signals derived from radiation paths progressively outward from the center path is progressively less than the information content of detector signals derived from the central radiation path. The sampling rate of the outward detector signals can be lower without loss of information. The resolution of the outward detector signals can also be lower, and as desired, either the sampling rate or the resolution or both can be varied in accordance with the position of the detector in relation to the center path. |
