用超速CT机检测99例无症状香港中国人降低钙指数

回顾分析Ｍａｔｉｌｄａ医院超速ＣＴ室筛选首批病人中９９例中国人资料，很明显从通常采用１３０－１００Ｈｏｕｎｓｆｉｅｌｄ单位作为检出冠状血管钙化的基数应用至中国人身上其阈值数目需要降低，同时，我们也发现如果病人年龄按每１０年范围分组（２１－３０，３０－４０，４１－５０，５１－６０）而计算其超速ＣＴ的钙化指数会较随机男女一起按平均计算更易区分其差异．进一步分析显示，男性中年时候超速ＣＴ指数已达最高值，而女性则晚１０年方达最高值，因此，为了更易探测冠脉循环内钙化倾向应作出超速ＣＴ检出钙化的指数数目．这些实践经验对动脉粥样硬化过程的预测或预防有实际意义．

Significance of Lowering the Threshold Value for the Calcium Score in 99 Asymptomatic Hong Kong Chinese Subjects by using of Ultrafast CT

The Data accrued on 99 Chinese patients among the Initial Batch of subjects scanned at the Matilda Hospital Ultrafast CT unit were analysed retrospectively. It became apparent that the Threshold CT Number could be lowered for Chinese individuals from the usually adopted value of 130 to 100 Hounsfield Units to meaningfully pick up evidence of background Coronary Calcification. It was also found that patients should be segregated into 10year ranges(21-30,31-40,41-50, 51-60)rather than being lumped together randomly to allow a clear distinction in mean CT Score between Males and Females. Furthermore Males tended to have the highest CT Score in middle age while Females did so a decade later.A Case may therefore be made to lower the Basal CT Number in order to facilitate early detection of Calcification, or the tendency to Calcification,in the Coronary Circulation. This in turn may have practical implications for Pre-emptive and Preventive measures against the Atherosclerotic process.