16层螺旋CT血管成像技术及其对主动脉夹层的诊断.docVIP

16层螺旋CT血管成像技术及其对主动脉夹层的诊断 　　 the image technology and diagnosis advantages of 16-slices ct angiography for aortic dissection 　　 　　 　　yang qing, yang hong-ling. 　　 　　 　　department of ct, daxian people hospital of sichuan province, sichuan 635000, china 　　abstract] objective to discuss the image technology and diagnosis advantages of 16-slice spiral ct angiography for aortic dissection. methods the retrospective analysis of multi-slice spiral ct angiography (mscta) for 25 patients with aortic dissection verified by confirmed by operations. the imaging parameters were set as following: standard reconstruction.section thickness 1.25mm, space 1.2mm. the volume data of all patients were reconstructed using 3d techniques including multi-planar reconstruction (mpr), maximum intensity projection (mip) and volume rendering (vr). results these cases could be displayed clearly by mscta with the range of the aortic dissection, intimal flap, the location of the rupture, true and false lumen, mural thrombus around the tumor and the relationship with peripheral big vessels. conclusion aortic mscta is a very ripe imaging reprocessing technique.it can be convenient, quick ,aurate and multilevel in respect of displaying aortic dissection. it plays an important advantage on the diagnosis of aortic dissection and should be the first choice for diagnosis of aortic dissection. 　　 　　 　　[key words] tomography; angiography; dissection; diagnosis 　　 　　 　　主动脉夹层是一种起病急，病死率高，早期易漏诊误诊的疾病。目前一致认为高血压为最常见的病因[1,2]。本病随时可能威胁患者生命，因此要求有一种简便、快捷、安全而又准确的检查方法。16层螺旋ct因其亚秒级的扫描速度，覆盖范围广，图像后处理功能强大，并能准确直观地显示主动脉夹层的特异性征象，已成为主动脉夹层检查的首选可靠的检查方法。现就我院16层螺旋ct诊断主动脉夹层所运用的成像方法及临床应用经验进行分析和探讨。 　　 　　 　　1.一般资料 　　 　　 　　收集我院xx年1月-xx年1月主动脉夹层25例资料，其中男16例，女9例，年龄21-75岁，平均58岁。患者既往有高血压病23例；首发症状为胸痛17例，后背痛4例，腹痛3例，头痛1例。按debakey［3］分型：ⅰ型9例，ⅱ型4例，ⅲ型12例。25例中17例mscta、mri、彩超共同诊断为主动脉夹层，8例主动脉夹层行dsa治疗确诊。 　　 　　 　　2.检查方法 　　 　　 　　全部病例均经美国ｇｅ公司ｌight-speed16层螺旋ｃｔ机平扫加主动脉ct血管成像(cta)检查。扫描范围从主动脉上方3cm至髂总动脉分叉下方3cm。扫描参数：120kv，200-380ma。层厚1.25mm、螺距1.