Comparison of Spatial Resolution in High-Resolution Multislice Computed Tomography and Digital Subtraction Angiography using Renal Specimens.

摘要

SUMMARY: OBJECTIVE To compare maximum spatial resolution in multislice computed tomography (MS-CT) and digital subtraction angiography (DSA) using an arterial tree model for canine kidney specimens.METHODS Twenty-three isolated fox terrier kidneys were catheterized with a 4F catheter and underwent contrast-enhanced MS-CT with a maximum spatial resolution of 0.23-mm isotropic voxel size in an early arterial phase. In addition, a digital subtraction angiogram was performed on all kidneys. The kidneys were segmented semiautomatically, and each parenchymal vessel that was identified in the kidney was marked. The maximum intensity projections of arterial vessels in the CT datasets were evaluated in a comparison with the DSA datasets.RESULTS No significant difference in vessel delineation and count was found at any level up to the fourth level of intrarenal branching.CONCLUSION MS-CT has the potential of replacing DSA in the diagnosis of intrarenal arteries.