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ＳＯＭＡＴＯＭ ＣＲ全身ＣＴ为保证扫描断层的精确性和成像质量，采用了前、后可调光阑（Ｘ线遮光器）技术即采用球管光阑和检测器光阑对Ｘ线进行准直。调节光阑开口的大小，可使断层厚度分别达到２ｍｍ、４ｍｍ、８ｍｍ。球管光阑和检测器光阑是由扫描控制单元（ＳＣＵ）的微
SOMATOM CR Whole Body CT To ensure the accuracy and quality of the scanned tomography, the front and back adjustable aperture (X-ray chopper) technology is used to align the X-rays using a tube aperture and a detector aperture. By adjusting the size of the diaphragm opening, the thickness of the fault can reach 2mm, 4mm, and 8mm, respectively. The tube aperture and the detector aperture are made by the scanning control unit (SCU)