Table 1.

Imaging parameters

Modality	Equipment	Settings	Contrast
X-ray fluoroscopy	OEC Elite 9900 C Arm (GE, USA)	Fluoroscopic imaging 8–12 f.p.s and digital subtraction angiography 25 f.p.s	20-ml Bolus contrast (Omnipaque 300, GE Healthcare, Auckland) was introduced manually
CT	Siemens Biograph mCT scanner (Siemens, Erlangen DE)	Slice thickness 0.6 mm, pitch 0.8, kV 120. Effective mat rotation time, 0.5 s.	Bolus-tracked contrast was initiated manually (Omnipaque 300, GE Healthcare, New Zealand).