任何方式的X线检查都是有损受检者健康的,受检者都要承受不同程度的辐射,辐射对健康造成的危害危险度与受检者所受X线放射量呈线性无阈关系,既受照射剂量越大辐射对健康的危害风险越高。放射性检查是儿童许多疾病评估的基本工具,其中CT因具有较高的空间分辨率而备受临床医生的 X-ray examination in any way is detrimental to the health of the subjects, the subjects have to bear different levels of radiation, the risk of radiation hazards to health and X-ray radiation suffered by the subject was a linear threshold-free relationship , The higher the exposure dose, the higher the risk of health hazards. Radiological examination is an essential tool for many childhood disease evaluations, in which CT is widely accepted by clinicians because of its high spatial resolution