TABLE 1

Acquisition Parameters for Standard Lung Perfusion and Ventilation Imaging in 18 Participating Hospitals

Hospital	Camera age (y)	Collimator	Matrix	Patient position	Perfusion dose (MBq)	No. of projections	Frame (kcts or time)	Ventilation method	Dose (MBq)	Frame (kcts or time)	No. of projections
TU	8	HR	512	Supine	111	6	300 s	Venticol	740	600 s	6
IJ	10	AP	256	Supine	50	4	300 s	Venticol	1,100	300 s	4
B	6	HR	256	Supine	185	6	600	Venticol	111–1,110	100	4
H	10	HS	256	Supine	130	6	600	Solcovent	2,000	300	6
E	10	GP	256	Supine	148	6	700	Technegas	22–33	300 s	4
PQ1	3	HR	128	Supine	185	8	130 s	Solcovent	2,220	180 s	8
PQ2	10	AP	128	Supine	15	6	600+t	Solcovent	2,220	600+t	6
V1	15	GP	256	Supine	110	6	600	Technegas	20–40	200	6
V2	10	AP	128	Supine	110	6	600	Technegas	20–40	200	6
FG	16	AP	128	Supine	111–158	6	600	Technegas	370	400	6
R	8	HR	128	Supine	110	6	1,000+t	Venticol	900	400+t	6
N	12	HR	128	Supine	185	6	90 s	Venticol	740	150+t	6
Z	16	AP	128	Supine	148	4	600	Technegas	37	400	4
S	12	AP	256	Supine	100	6	400	Technegas	400	200	6
XY	4	GP	128	Supine	100	6	120 s	Technegas	300	120 s	6
M	12	HS	128	Supine	74	6	400	Venticol	1,300	400	6
K	21	GP	256	Supine	110	4	1,000	Aerosol	740	300 s	4
O	1	AP	256	Supine	150–185	8	90 s	Technegas	150–400	120 s	8
CD	11	GP	256	Supine	111	4	400	Venticol	740	150–300	4
L	15	GP	256	Sitting	74	4	600/500	Ultravent	1,480	300	4

HR = high resolution; AP = all purpose; HS = high sensitivity; GP = general purpose; 600+t = first frame is images at 600 kcts and rest are with same time.
Hospitals are coded to maintain anonymity.