为了使头颅CT片的质量评价工作由经验型向科学型发展迈进一步 ,从而推动QA和QC活动的开展 ,我们探讨将正常头颅CT片的空气区、脑室前角区、半卵圆中心区、丘脑区、及颅骨区的密度值标准范围参考数据予以确定 ,使用密度计测量密度值数据这一方法 ,来客观地评价头颅CT片密度值的 In order to make the evaluation of the quality of CT cranial imaging one step further from the empirical type to the scientific type, and to promote the QA and QC activities, we explored the normal cranial CT slice of the air zone, anterior chamber angle, Thalamus, and skull area density range of reference values ​​to determine the standard data, the use of density measurement of density data, a method to objectively evaluate the value of the head CT density