Table 2:

Technical parameters for different DSA examinations; protocol 1: diagnostic angiography of cerebral vessels^a

Vessels	RICA Head	RICA Head	RICA Head	RICA Head	RVA Head	LICA Head	LVA Head
Projections for DSA runs	AP/LAT biplane	Oblique monoplane	Oblique monoplane	3D RA	AP /LAT biplane	AP/LAT biplane	AP/LAT biplane
fps:duration	2 fps:4 s	2 fps:4 s	2 fps:4 s	25 fps:4 s	2 fps:4 s	2 fps:4 s	2 fps:4 s
	1 fps:5 s	1 fps: 2 s	1 fps:2 s		1 fps:5 s	1 fps:5 s	1 fps:5 s
No. of frames	26	10	10	100	26	26	26
FOV (cm)	22/23	17	17	17	22/23	22/23	22/23
SID	102/99	102	103	119	104/99	106/100	102/101
kV(p) (AP/LAT)	80/75	85/–	82/–	92/–	80/75	80/75	80/75
mAs per f (AP/LAT)	91/25	102/–	101/–	1.1/–	114/28	97/25	92/27

Note:—RICA indicates 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.
↵a AEC 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.