便捷式膀胱容量测定仪BVI9400及超声系统iU22评估膀胱容量的对比研究

Comparative Study on Evaluating the Bladder Volume between BladderS can BVI9400 and Ultrasound System iU 22

目的评估最新一代膀胱扫描仪BVI9400的测量准确度。方法选用两个膀胱模体,评估BVI9400测量精度。采用BVI9400和i U22测量341例成人膀胱容量,比较其差异。结果与模体体积相比,BVI测量差异为2.5%和1.36%。BVI9400和i U22测量结果之间存在强相关(R=0.96,P<0.001),且差异随膀胱体积的增大而减小,与性别无关(P>0.10)。结论 BVI9400测量精度高且稳定性好。鉴于其使用便捷,BVI9400可以作为盆腔肿瘤分次放疗前的辅助设备以评估膀胱体积是否与定位时一致。

Objective To evaluate the accuracy of the latest BladderScan BVI9400 on measuring bladder volume. Methods Two bladder phantoms were selected for investigating the accuracy of BVI9400. 341 patients with the iU22 ultrasound examinations were fol owed by BVI 9400. The difference and correlation between BVI9400 and iU22 were contrastively analyzed. Results The relative difference between results from BVI9400 and phantom volume was 2.5% and 1.36%. There was a strong correlation for patients between BVI9400 and iU22 （R=0.96, P〈0.001）. The relative difference between BVI9400 and iU22 decreased with the increasing of bladder volume and had no significant difference with patient’s gender （P〉0.1）. Conclusion BladderScan BVI9400 had the ability of high accuracy and good stability of measured data. In view of quick and conveniences, BVI9400 could be as auxiliary equipment on pelvic tumor to evaluate whether the bladder volume during fractional radiotherapy was consistency with that during CT positioning.