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截面扫描是通过运用裂隙准直器的匀速运动记录下来的一条曲线,它反映了备有裂隙准直器的探头经过之处的放射性相对强度。探头的灵敏度保证了截面扫描曲线得以灵敏地反映体内不同部位的放射性相对强度。由于裂隙准直器的裂隙是在准直器中部的一条从一端到另一端的没有边沿的完全的裂缝,所以它探测的范围及于整个截面,反缺的是人体整个截面的情况。就纵截而言,所得曲线上见到的放射性高峰究竟是从病人右边,还是从病人左边得来的则不能分辨;因此要分辨左右,就必须用横截来解决问题。但是横截也存在和纵截时类似的问题,就是裂隙探测到的部位,除了裂隙的垂直下
Cross-sectional scanning is a curve recorded by uniform motion using a slit collimator, which reflects the relative intensity of the radioactivity where the probe equipped with the slit collimator passes. The sensitivity of the probe ensures that the cross-sectional scanning curve can sensitively reflect the relative radioactivity of different parts of the body. Since the fissure of the fissure collimator is a complete crack free from an edge from one end to the other in the middle of the collimator, the extent of its detection and the entire cross-section are the opposite of the entire cross-section of the human body. In the case of longitudinal cuts, the peak of the radioactivity seen on the resulting curve can not be discerned from the right side of the patient or from the left side of the patient; therefore, to distinguish between left and right, the problem must be solved with a cross section. However, there is also cross-cutting and longitudinal section of a similar problem, is the detection of cracks in the site, except the vertical fracture