OBJECTIVE: The aim of this study was to investigate the differences inthe time and image quality of reconstructed cerebral angiograms betweenvolume CT digital subtraction angiography (VCTDSA) and conventionalCT angiography(CTA) with bone elimination technique. MATERIALS AND METHODS: Thirty-two patients with cerebrovascular diseases, who underwent VCTDSA in our department, were further remodeled cerebral vessels with both VCTDSA and conventional CTA. Cerebral vessels were displayed with 3D volume rendering (3D VR) and 3D maximum intensity projection (3D MIP), respectively. The post-processing time and the image quality were thencompared. RESULTS: The image quality with VCTDSA vessel reconstruction was excellent. Compared with conventional CTA, VCTDSA had an advantage in displaying the integrity of vessels, the range of intracranial arteries and veins, and also in lessening the remained high density shadows ( p<0,001). The time of post-processing by VCTDSA (mean: 6.87±2.96min) was much shorter than that of conventional CTA (mean: 14.37±1.66min)( p<0.001). There was a significant positive correlation between thepost-processing time and the subtraction image quality with VCTDSA( r=0,79, p<0.001). CONCLUSION: VCTDSA is a fast, accurate and feasible method for the sensitive assessment of cerebrovascular structures and can be used as a powerful tool in the diagnosis of cerebrovascular diseases. Compared with conventional CTA, VCTDSA has an advantage in displaying the integrity of vessels, the range ofintracranial arteries and veins, and also in lesserung the remained high density shadow. The post-processing time of VCTDSA is significant shorter than that of conventional CTA. 展开▼
