三维超声测量不规则物体体积的准确性  

Accuracy of three-dimensional ultrasound volumetric measurements for irregular-shaped structures

作　　者：张剑[1] 胡建群[1] 夏泽[2] 

机构地区：[1]南京医科大学附属第一医院超声科,江苏南京210029 [2]扬州苏北人民医院超声科,江苏扬州225001

出　　处：《中国医学影像技术》2009年第6期1099-1102,共4页Chinese Journal of Medical Imaging Technology

摘　　要：目的研究三维超声体积自动测量系统不同测量平面及旋转步长对不规则物体体积测量准确性的影响。方法分别对14个不规则形状实验模型作三维扫查,然后分别在A和C平面上30°、15°、9°、6°四种不同旋转步长下测量其体积。结果①A平面或C平面下4种不同旋转步长体积测量值与实际体积高度相关(P<0.05),与实际体积差异有统计学意义(P<0.05),6°回归系数最高,与6°测量值相比,15°和9°测量值差异无统计学意义,30°差异有统计学意义;②A、C不同平面,30°测量值间差异有统计学意义,15°、9°和6°测量值间差异无统计学意义。结论≤15°可作为三维超声测量不规则形状物体体积的合适旋转步长。Objective To evaluate the accuracy of three-dimensional ultrasound volumetric measurements with different rotational steps and measurement planes for outlining the irregular-shaped structures. Methods Volume of 14 irregular phantoms of water sac were measured by different rotation steps （30°, 15°, 9° and 6°） at A and C plane respectively. Results （1） For irregula^shaped structures measured at A and C planes, the correlation between measured volumes and true volumes was significant with four different rotational steps （P〈0.05）, and there was significant difference in actual volumes and measured volumes （P〈0.05）. Measurement at 6° steps had the highest accuracy, and there was significant difference between 30° and 6°, but there was no significant difference with 15° or 9° compared to 6°. （2） For irregular-shaped structures measured at A and C planes, there was significant difference with steps of 30° between A and C planes, and there was no significant difference by using 15°, 9° or 6° between the two planes. Conclusion In three-dimensional ultrasound volumetric measurements for irregular-shaped structures, ≤15° should be recommended as the proper rotational steps.

关 键 词：超声检查 三维 容积测量 旋转步长 测量平面 

分 类 号：R445.1[医药卫生—影像医学与核医学]