Comparison The Diagnostic Value Of Volume Computed Tomographic Digital Subtraction Angiography With Matched Mask Bone Elimination For Intracranial Arteriovenous Malformation

Purpose: To compare the diagnostic value of volume computed tomographic digital subtraction angiography(VCTDSA)with matched mask boneelimination(MMBE)for intracranial arteriovenous malformation.Materials and Method: The clinical and imaging data of 37 patients who completed head or head and neck CTA and was diagnosed to be intracranial AVM from February 2015 to February 2018 were retrospectively analyzed.The original images was reconstructed by the same operator using VCTDSA and MMBE respectively.Compare the post-processing time and evaluate automatic-subtraction image quality,manual-subtraction image quality and lesion image quality.Result: The time of automatic,manual and total-subtraction of VCTDSA and MMBE is statistically significant(P<0.001).VCTDSA has a shorter time of automatic time than MMBE,while the time of manual andtotal-subtraction are longer than MMBE.The image quality difference of VCTDSA and MMBE after automatic-subtraction was statistically significant(P<0.001):VCTDSA was mainly grade III(62.2%,23/37)and MMBE was mainly grade II(59.5%,22/37),and manual-subtraction was statistically significant(P=0.011): VCTDSA was mainly grade I(56.8%,21/37)and MMBE was mainly grade II(62.2%,23/37).The difference in the image quality of 19 cases of AVM located in superficial brain parenchyma(including vascular mass,feeding artery and drainage vein)treated by above two methods was statistically significant(P=0.008).VCTDSA was better than MMBE in display images.And the two methods had statistically significant differences in the quality of local drainage vein images of AVM located in superficial brain parenchyma(P=0.035).In by contrast,MMBE showed no significant difference with VCTDSA in images quality of the total lesion,nidus or feeding artery of all 37 patients(P=0.317、0.739、0.135).Conclusion: VCTDSA had better display than MMBE in the total lesion of AVM located in superficial brain parenchyma,especially the drainage vein.MMBE removes bone thoroughly and can save more time in the post-processing.