摘要
目的探讨多层螺旋CT(MSCT)在输尿管重建中显示输尿管结石的临床应用价值。资料与方法实验组:27个取自患者的泌尿系结石,分别经设置不同扫描参数的单层螺旋CT(SSCT)和MSCT扫描。比较在设置不同扫描参数下SSCT和MSCT的结石检出率,检验不同扫描层厚与检出结石数的关系。临床组:35例腹部平片(KUB)阴性但临床高度怀疑输尿管结石患者均行B超和MSCT扫描及输尿管重建。输尿管重建方法有:曲面重建、最大密度投影和表面遮盖成像。结果实验组MSCT5mm和10mm层厚扫描,然后分别以0.625mm和1.25mm层厚重建所得的图像,其质量及其显示出的结石数与MSCT相应同等薄层扫描(0.625mm和1.25mm层厚扫描)所得的结果完全一致。临床组35例40个输尿管结石,B超发现23例25个,检出率为62.5%;MSCT薄层重建结合输尿管重建后结石检出率为100%。并能清楚显示结石位置、大小及输尿管梗阻扩张的程度及范围。结论MSCT常规平扫结合薄层重建特别是CT尿路造影(CTU)可提高结石检出率及评价输尿管有无梗阻及其程度。必要时增强扫描可评价患侧肾功能。
Objective To assess the diagnostic value of multi slice spiral CT reconstruction in detection of ureter calculi. Materials and Methods Experimental group： 27 urinary calculi were performed MSCT and SSCT using different parameters. The number of calculi visualized on the two type CT images was recorded and difference in detection rates was assessed. Clinical group： Ultrasound, MSCT scan and reconstruction were performed in 35 cases suspected as ureter calculi with negative results of KUB. Reconstruction methods included： curved planar reformatting, maximum intensity projection and shaded volume display. Results The quality of reconstruction images with MSCT using reconstruction thickness （0.625mm or 1.25mm） was nearly identical with that of images obtained using 0.625mm or 1.25mm collimation correspondingly. In clinical group： 35 cases with 40 calculi were detected, 23 cases with 25 calculi were detected by ultrasound（62.5% ）. The detection rates of calculi was 100% by MSCT thin thickness scanning and MSCT reconstruction, in addition, the location, size and morphology of calculi and the ureter obstruction could be clearly demonstrated in MSCT image. Conclusion Using a thin slice width reconstruction with a thinner collimation combined with various reconstruction techniques especially CTU can not only greatly improve the detection rate of urinary calculi on MSCT, but also evaluate the extent of ureter obstruction. Contrast CT scan can provide the information of renal function.
出处
《临床放射学杂志》
CSCD
北大核心
2006年第7期676-679,共4页
Journal of Clinical Radiology
