Table 1.

Scanner models and acquisition parameters used in the 11 institutions participating in the Lungtech trial RTQA site visit.

Institute	Scanner brand	FOV Acquisition diameter (mm)#	FOV Reconstruction diameter (mm)	bin technique &	kVp+ (V)	Expos-ure (mA/s)	Rotation speed (s)	Slice thickness (mm)	Scan length (mm)	CTDI vol(mGy)	Tube current (mA)	Pitch *
A	Toshiba Acquilion/LB	550	550	10, P	120	76	0.5	2	170	NA	250	0.12
									170	NA	250	0.12
									170	NA	250	0.075
B	Philips Brillance big bore	600	480	10, A	120	600	0.5	2	162	NA	180	0.15
									162	NA	132	0.11
									162	NA	90	0.075
C	Philips Gemini TF Big Bore	600	600	10, P	120	250	0.5	2	180	13.2	45	0.09
									180	13.2	45	0.09
									180	13.2	45	0.09
D	Philips Brilliance big bore	600	568	10, A	120	801	0.44	3	240	NA	74	0.08
									240	NA	74	0.041
									240	NA	74	0.041
E	Siemens Sensation open	500	500	8, P	120	400	0.5	1.5	79.5	NA	80	0.16
									79.5	NA	80	0.1
									120	NA	40	0.1
F	Siemens sensation open	500	500	8, P	120	400	0.5	3	186	35.6	80	0.1
									189	35.6	80	0.1
									276	36.0	40	0.15
G	Philips Brilliance big bore	600	568	10, A	120	801	0.44	3	171	47.4	74	0.08
									171	47.4	132	0.041
									171	47.4	90	0.041
H	Philips Brilliance big bore	600	480	10, A	120	600	0.5	2	172	35.5	180	0.15
									172	35.5	132	0.11
									172	25.5	90	0.075
I	Philips Brilliance big bore	600	500	10, P	120	350	0.5	2	226	20.7	105	0.15
									226	20.7	53	0.11
									226	20.7	77	0.08
J	Toshiba Acquilion/LB	550	550	10, P	120	46	0.33	2	161	81.3	150	0.075
									161	108.4	150	0.075
									161	108.4	150	0.075
K	Siemens Somatom Definition AS	500	500	10, P	120	80	0.5	3	176	NA	160	NA
									176	NA	160	NA
									176	NA	80	NA

^*Where 3 values are given, different values are used for breathing periods of 3, 4 and 6 s, respectively. The pitch values that are larger than pmax are given in bold. NA: Not available. ^$Number of bins are given and type of binning: P = phase binning, A = amplitude binning, ^#FOV = field of view, ⁺KVP = kilovolt peak