随着放射科质量控制 (ＱＣ)与质量保证 (ＱＡ)工作的深化 ,许多单位已意识到质量控制与质量保证工作的开展在延长ＣＴ管球寿命及由其带来的巨大经济收益方面所产生的实际意义 ,同时在如何延长管球使用寿命方面探讨出了一些可行性经验[1～ 3] 。目前 ,国内见诸报道的ＣＴ管球曝 With the deepening of Quality Control (QC) and Quality Assurance (QA) work in radiology departments, many organizations have realized that the development of quality control and quality assurance work has resulted in the prolongation of the life span of CT tubes and the huge economic benefits derived from them. The practical significance of this, at the same time, explored some feasible experiences in how to extend the service life of the pipe [1–3]. At present, the CT tube ball exposure reported in China