虚拟内镜数字减影血管造影评价颅内动脉瘤：与容积再现数字减影血管造影的比较

Evaluation of intracranial aneurysms with virtual endoscopy digital subtraction angiography： a comparison with volume rendering digital subtraction angiography

目的探讨虚拟内镜（virtual endoscopy, VE）重建技术在旋转数字减影血管造影（digital subtraction angiography, DAS）指导下进行介入治疗时的显示优势。方法选择在DSA指导下接受介入治疗的颅内动脉瘤患者。采用容积再现（volume rendering, VR）和VE技术重建图像对动脉瘤瘤颈进行测量，比较2种技术测得的动脉瘤瘤颈直径和图像清晰度。结果共纳入62例患者，平均年龄（59.8±2.6）岁。27例在VR图像上无法清晰显示和测量动脉瘤瘤颈直径的患者，经VE重建后均可清晰显示并准确测量，且测量值与VR图像测量值相比存在显著差异[（2.47±1.25）mm对（3.14±1.16）mm；t＝2.042，P＝0.046]。不过，对于在2种图像上均能清晰显示的动脉瘤，其瘤颈测量值并无显著差异。结论采用VE技术对DSA图像进行重建分析能更直观准确地测量动脉瘤瘤颈直径，从而更好地指导介入治疗。

Objective To investigate the advantages of virtual endoscopy （VE） reconstruction technique for interventional therapy under the guidance of rotational digital subtraction angiography （DAS）. Methods Patients with intracranial aneurysm received interventional therapy under the guidance of DSA were selected. The reconstruction of images with the volume rendering （VR） and the VE techniques were used to measure aneurysmal necks. The diameters and image clarity of the aneurysmal necks measured by the 2 techniques were compared. Results A total of 62 patients were included. Their mean age was 59.8 ±2.6 years. In twenty-seven patients who were unable to clearly reveal and measure the diameters of aneurysm necks on the VR image, they could clearly reveal and accurately measure after VE reconstruction, and there was a significant difference between the measured values of the VR image and the VE image （2.47±1.25 mmvs. 3.14±1.16mm; t= 2.042, P= 0.046）. However, there was no significant difference in the measured values of the aneurysm diameters which was clearly revealed on the both images. Canelmion The use of VE technique for reconstruction analysis of the DSA images can more directly and accurately measure the diameters of the aneurysm necks, so as to better guide the interventional therapy.