64层螺旋CT数字减影术对颅内动脉瘤诊断价值研究

目的 评价64层螺旋CT数字减影技术对颅内动脉瘤的诊断价值.方法 对36例蛛网膜下腔出血患者行64层螺旋CT平扫及增强扫描,每例患者均行常规CTA及减影CTA(digital subtraction CTA,DSCTA)重建,以DSA检查结果为标准,对比研究2种重建技术的图像质量、诊断准确性.结果 36例患者共计40个动脉瘤,经DSCTA检出动脉瘤40个,灵敏度、特异度分别为100%,经常规CTA检出动脉瘤37个,灵敏度、特异度分别为92.5%和100%.2组后处理图像质量单项有序行乘列表秩和检验有显著性差异(P＜0.01),DSCTA图像质量优于常规CTA.结论 64层螺旋CT DSCTA可作为筛查及诊断动脉瘤的首选方法.

The Value of 64-slice Spiral CT Digital Subtraction Technique in the Diagnosis of Intracranial Aneurysm

Objective To study the value of 64-slice spiral CT digital subtraction technique in the diagnosis of intracranial aneurysms.Methods 36 patients with subarachnoid hemorrhage underwent 64-slice spiral CT examination,including unenhanced CT scan and enhanced CT scan.The image data were used to reconstruct the conventional CTA and digital subtraction CTA(DSCTA).Then the differences of image quality and diagnostic efficiency between the CTA and DSCTA were compared based on the standard of DSA . Results There were 40 intracranial aneurysms in 36 patients . 40 aneurysms were detected completely by DSCTA,the sensitivity and specificity of the DSCTA were both 100% . 37 aneurysms were detected by CTA , and the sensitivity and specificity were 92.5% and 100%,respectively.There was significant difference in image quality between CTA and DSCTA(P＜0.01).Conclusion DSCTA with 64-slice spiral CT might be the first diagnostic tool in screening intracranial aneurysm.