Eide K R, Ødegård A, Myhre H O, Lydersen S, Hatlinghus S, Haraldseth O
Department of Food Science and Medical Technology, Sør-Trøndelag University College, Norway.
Eur J Vasc Endovasc Surg. 2009 Jan;37(1):23-30. doi: 10.1016/j.ejvs.2008.09.017. Epub 2008 Nov 17.
We have explored the usefulness of an on-table, cross-sectional radiological imaging (DynaCT) in endovascular aortic repair (EVAR). DynaCT images were compared to images from a regular multidetector (16 slice) CT. In the comparison, we tested the accordance of firstly 5 relevant clinical measurements and secondly the visibility of 9 anatomical areas in the two different types of images. This imaging was carried out in addition to the usual angiographic imaging. DESIGN, MATERIAL AND METHOD: 20 patients with infrarenal abdominal aortic aneurysm (AAA) were prospectively enrolled in the study. We compared Images from DynaCT with two different doses of contrast medium to MDCT-images in two different ways. Firstly relevant arterial diameters and lengths and secondly, 9 anatomical areas were evaluated regarding visibility which was scored on a 4-point scale.
There were no significant differences in the measured arterial diameters and lengths. MDCT had a significantly higher visibility score than both DynaCT investigations. However, with the highest contrast medium dose we found acceptable diagnostic quality in 78-94% of the cases for 8 of the 9 investigated anatomical areas.
Our findings indicate that on-table DynaCT are of sufficient quality to give relevant information of arterial measurements, needed in endovascular repair of infrarenal aortic aneurysms.
我们探讨了术中横断面放射成像（动态容积CT）在血管腔内主动脉修复术（EVAR）中的实用性。将动态容积CT图像与常规多排探测器（16层）CT图像进行比较。在比较过程中，我们首先测试了5项相关临床测量的一致性，其次测试了两种不同类型图像中9个解剖区域的可视性。除了常规血管造影成像外，还进行了这种成像。
设计、材料与方法：20例肾下腹主动脉瘤（AAA）患者前瞻性纳入本研究。我们以两种不同方式将动态容积CT的图像与两种不同剂量造影剂的MDCT图像进行比较。首先比较相关动脉直径和长度，其次评估9个解剖区域的可视性，并按4分制评分。
测量的动脉直径和长度无显著差异。MDCT的可视性评分显著高于两种动态容积CT检查。然而，使用最高剂量造影剂时，9个被研究解剖区域中的8个区域在78% - 94%的病例中具有可接受的诊断质量。
我们的研究结果表明，术中动态容积CT质量足以提供肾下腹主动脉瘤血管腔内修复所需的动脉测量相关信息。
