| 摘要 |
A fan-shaped beam (13) of hard radiation is emitted from a radiation source (11). This fan-shaped beam penetrates an examination region (14) and then impinges on a row of detectors (16) in which the radiation values corresponding to the transparency in the cross-section of the examination region are detected. The detectors (16) are situated on a circular track concentrically relative to the axis of rotation of the radiation source (11), and thus receive as they rotate a sequence of measured data for specific cross-sectional regions in each case, which are displayed via evaluation devices (17, 21). This device permits high-power scanning with a high resolution, there being no need for precise matching of the amplification between the individual detectors. It is possible for the detectors to be routinely calibrated without the patient having to leave the measurement region. <IMAGE> |
