子宫弥散加权成像磁化率伪影与肠道准备之间的相关性研究

Correlation between the intestinal preparation and uterine diffusion weighted imaging magnetic susceptibility artifact

摘要:

目的：探讨肠道准备对子宫扩散加权成像磁化率伪影的影响。方法：将60名健康女性受检者（23～45岁）随机分为2组（无肠道准备组和肠道准备组），每组30名受检者，然后对每一位受检者进行T2轴位和失状位、DWI扫描，然后由2名医师分别对其图像进行双盲法评价。结果：2名医师评价无肠道准备组肠道以气体为主的出现率平均为65.00%，以液体为主的出现率平均为35.00%；肠道准备组肠道以气体为主的出现率平均为23.33%，肠道以液体为主的出现率平均为76.67%，2名医师评价的2组结果均具有统计学差异（P1=0.002，P2=0.004）。肠道以气体为主时子宫DWI磁化率伪影阳性率平均为82.91%，肠道以液体为主时子宫DWI磁化率伪影阳性率平均为13.46%，２名医师评价磁化率伪影结果均具有统计学差异（P1=0.000，P2=0.000）。结论：子宫DWI检查前进行肠道准备有助于减少子宫DWI磁化率伪影的产生，从而提高子宫DWI的图像质量，这更有利于进行子宫组织学的研究、子宫疾病的诊断、监测以及治疗后的疗效评价。

Abstract:

Objective：To investigate the influence of bowel preparation on uterine diffusion weighted imaging magnetic susceptibility artifact. Methods：Totally 60 healthy women（ranged between 23 to 45 years old） were randomly divided into two groups：non bowel preparation group and bowel preparation group，30 subjects in each group. Then every subject was scanned for T2WI（axial and sagit－tal plane） and DWI. Fnally every image was evaluated by two doctors in a double-blind way. Results：In non bowel preparation group，average occurrence rate of air predominance was 65.00% and occurrence rate of fluid predominance was 35.00%. In bowel prepara－tion group，mean occurrence rate of air predominance was 23.33% and occurrence rate of fluid predominance was 76.67%. There were significantly statistical differences in two doctors’ evaluation between two groups（P1=0.002，P2=0.004）. The average positive rate for uterine DWI susceptibility artifact was 82.91% when fluid predominating in the intestinal tract and the average positive rate for uterine DWI susceptibility artifact was 13.46% when air predominating in the intestinal tract. There were significantly statistical differences in two doctors’ evaluation of magnetic susceptibility artifact between two groups（P1=0.000，P2=0.000）. Conclusion：Bowel preparation can decrease susceptibility artifact before uterine DWI examination，and then improve the quality of uterine DWI，which is beneficial for the uterine histological study as well as the diagnosis，monitoring and assessment of uterine diseases.