Table 3:

Technical parameters for different DSA examinations; protocol 2: diagnostic angiography of cervicocerebral vessels^a

Vessels	Aortic Arch	RICA Neck	RICA Head	RICA Neck	RICA Neck	RVA Neck	RVA Head	LICA/Neck	LICA Head	LVA Neck	LVA Head
Projections	AP	Obliq. LAT biplaneb	AP/LAT biplaneb	3DRA	Obliq. monoplane	Obliq. monoplane	AP/LAT biplaneb	Obliq. LAT biplaneb	AP/LAT biplaneb	Obliq. monoplane	AP/LAT biplaneb
fps	1	2 and 1	2 and 1	25	1	1	2 and 1	2 and 1	2 and 1	1	2 and 1
Duration(s)	15	3 and 1	3 and 7	4	10	9	3 and 7	3 and 1	3 and 7	9	3 and 7
No. of frames	15	14	26	100	10	9	26	14	26	9	26
FOV (cm)	30	22/23	22/23	17	17	30	22/23	22/23	22/23	30	22/23
SID	104	105/107	102/99	119	103	105	104/99	105/104	106/100	104	102/101
(AP/LAT)
kV(p) (AP/LAT)	70/–	80/75	80/75	75/–	80/–	79/–	80/75	80/75	80/75	80/–	80/75
mAs/f (AP/LAT)	31/–	20/16	73/24	1.0/–	31/–	14/–	71/26	26/15	71/25	20/–	71/27

Note:—Obliq. Indicates oblique; RICA, right internal carotid artery; LICA, left internal carotid artery; RVA, right internal vertebral artery; LVA, left internal vertebral artery, 3D RA, 3D rotational angiography; AP, anterior posterior direction; LAT, lateral direction; fps, frames per second; SID, source to image distance (cm); mAs, tube current time product; Al, aluminum; HVL, half-value layer; Cu, copper.

^aAEC was used. Filtration was 2.9-mm Al HVL and 0.1-mm Cu. The total number of frames was 224 in protocol 1 and 275 in protocol 2. The fluoroscopy time was 5 minutes in both protocols.

^bThe imaging is shown in 2 parts: fast-phase and slow-phase.