Axiom artis vb22n

An interventional neuroradiologist performed DSA within 14 days of MRA (median, 10.3 days; range, 1 h−14 days). We perfomed conventional 2D-DSA on a monoplanar unit (Axiom Artis VB22N, Siemens) with a 17–20 cm field of view (FOV) and a 1,024 × 1,024 matrix. We performed rotational angiography with 200° rotational run, an 8-s, injecting 3–4 mL contrast medium per second, and acquiring 200 images. We reconstructed the 3D images by VR on a workstation (SyngoXWP VA70B; Siemens) with a 1,283 × 5,123 matrix. Two observers (M.H.L. And W.W., with 22 and 15 years of experience, respectively, in neurointerventional radiology), who were blinded to previous imaging results and all clinical, identified the morphology of vessels in this study.

Conventional DSA was performed on a monoplanar unit (Axiom Artis VB22N, Siemens Healthcare, Erlangen, Germany). Based on the results of TWIST, Seldinger technology by femoral artery puncture was used, and selective arterial injections with iodinated contrast agent (Omnipaque 300 mg/ml; GE Healthcare, Shanghai, China) were performed to identify the type of spinal vascular malformation, feeding artery, level, side, and the fistula. If necessary, additional injections were made into both vertebral arteries, the costcervical arteries, the thyrocervical trunks, and the iliolumbar arteries.