3D Rotational Angiography

The 3D Rotational Angiography (3DRA) examination was optimized for high-resolution reconstructions (either volume-rendering or multiplanar mode) and also for the visualization of iodine contrast, as 3D rotational angiography is meant for larger contrast differences (with pure contrast medium). The tube voltage was fixed at approximately 80 kV and a total volume between 24 to 28 mL of iodine contrast material (Visipaque 270; GE Healthcare, Mississauga, ON, Canada), at a rate of 4 mL/s, was injected. The rotation started 1.5 s after the injection in the internal carotid artery or vertebral artery [6 (link)]. The 3D reconstruction, 120 two-dimensional (2D) images were registered at a rate of 30 frames/s, from −120° to +120°, at a speed of 55°/s, with an acquisition time of 4 s and a reconstruction time of 5 s. The datasets acquired into a 2563 pixel matrix were directly transferred to a 3D workstation (Xtravision, Philips Healthcare, Amsterdam, The Netherlands), and reconstruction of the 3D volume was made from 100% to 140% in order to obtain more information with a better resolution [7 (link)].