BACKGROUND AND PURPOSE: Successful endovascular treatment of @entity438 requires understanding the exact relationship of implanted devices to the @entity439 , parent artery, and other branch vessels during the treatment. Intraprocedural C-arm CT imaging has been shown to provide such information. However, its repeated use is limited due to increasing radiation exposure to the @entity1 . The goal of this study was to evaluate a new volume-of-interest C-arm CT imaging technique, which would provide device-specific information through multiple 3D acquisitions of only the region of interest, thus reducing cumulative radiation exposure to the @entity1 . MATERIALS AND METHODS: VOI C-arm CT images were obtained in 28 @entity1 undergoing endovascular treatment of @entity438 . VOI images were acquired with the x-ray source collimated around the deployed device, both horizontally and vertically. The images were reconstructed by using a novel prototype robust reconstruction algorithm to minimize truncation artifacts from double collimation. The reconstruction accuracy of VOI C-arm CT images was assessed quantitatively by comparing them with the full-head noncollimated images. RESULTS: Quantitative analysis showed that the quality of VOI C-arm CT images is comparable with that of the standard Feldkamp, Davis, and Kress reconstruction of noncollimated C-arm CT images (correlation coefficient = 0.96 and structural similarity index = 0.92). Furthermore, 91.5% reduction in dose-area product was achieved with VOI imaging compared with the full-head acquisition. CONCLUSIONS: VOI imaging allows multiple 3D C-arm CT acquisitions and provides information related to device expansion, parent wall apposition, and neck coverage during the procedure, with very low additional radiation exposure to the @entity1 .

The Added Value of Volume-of-Interest C-Arm CT Imaging during Endovascular Treatment of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysm'] @entity438 :: ('MESH:D002532', 'Disease') :: ['intracranial aneurysms']
@entity438 :: (MESH:D002532,Disease) :: ['Intracranial Aneurysms']
