对医用辐射源检定的初衷与宗旨,是要追求辐射诊断装置的高清晰图像质量与接受低剂量X射线辐射。假设医用CT放射诊断图像质量为X级,X射线剂量为Y,将两者的比值假定为Z(暂且定义Z为图像质量剂量比),则Z=X/Y(1)那么,可以用Z值衡量患者接受X射线诊断(或治疗)的“图像(或实时影像)剂量效率”值。显然,只要Z值越大,对患者、放射医务工作者越安全,对医疗机构越有 The original intention and purpose of medical radiation source verification is to pursue the high definition image quality of the radiation diagnosis device and to accept the low dose X-ray radiation. Assuming that the medical diagnostic radiography image is X-level and the X-ray dose is Y, the ratio between the two is assumed to be Z (Z is the image quality to dose ratio) Z = X / Y (1) The value measures the “image (or live image) dose efficiency” value of a patient undergoing X-ray diagnosis (or treatment). Obviously, as long as the Z value is greater, the safer for patients and radiological medical workers, the more for medical institutions