Table 1. Patient Characteristics.

Patient number	Age	Sex	Ht (in)	Wt (lbs)	BMI	Study protocol	IV contrast admin
1	71	M	69	259	38.2	VC	N
2	42	M	73	185	24.4	VC	N
3	56	F	68	142	21.6	VC	N
4	71	F	64	177	30.4	VC	N
5	62	F	67	223	34.9	VC	N
6	50	F	67	200	31.3	VC	N
7	52	M	65	149	24.8	VC	N
8	51	F	64	140	24.0	VC	N
9	59	M	71	170	23.7	VC	N
10	55	M	67	200	31.3	VC	N
11	86	F	64	164	28.1	St	N
12	42	M	69	174	25.7	St	N
13	28	M	74	203	26.1	St	N
14	58	F	63	149	26.4	St	N
15	80	M	70	178	25.5	St	N
16	71	M	72	232	31.5	St	N
17	29	M	74	216	27.7	St	N
18	62	M	74	162	20.8	St	N
19	59	F	60	175	34.2	St	N
20	43	F	67	169	26.5	St	N
21	63	F	64	226	38.8	IV	Y
22	35	F	65	139	23.1	IV	Y
23	77	F	61	127	24.0	IV	Y
24	48	M	80	238	26.1	IV	Y
25	72	F	65	216	35.9	IV	Y
26	82	M	71	204	28.4	IV	Y
27	55	F	64	232	39.8	IV	Y
28	85	F	60	173	33.8	IV	Y
29	57	M	70	290	41.6	IV	Y
30	41	F	65	146	24.3	St	N
31	66	M	75	209	26.1	St	N
32	77	F	63	170	30.1	IV	Y
33	41	M	69	195	28.8	St	N
34	63	M	68	231	35.1	IV	Y
35	79	M	70	170	24.4	IV	Y
36	39	M	73	164	21.6	IV	Y
37	58	F	64	113	19.4	IV	Y
38	42	M	73	213	28.1	IV	Y
39	60	F	62	129	23.6	IV	Y
40	48	M	72	179	24.3	IV	Y
41	76	M	67	178	27.9	IV	Y
42	50	F	67	211	33.0	VC	N
43	52	F	65	182	30.3	IV	Y
44	42	M	72	239	32.4	IV	Y
45	69	M	69.5	178	25.9	IV	Y
46	54	M	67	203	31.8	IV	Y
47	52	M	70	153	22.0	IV	Y
48	57	F	65	178	29.6	IV	Y
49	70	M	70	200	28.7	IV	Y
50	63	F	64	253	43.4	IV	Y
Mean	57.7	23F, 27M	67.8	186.7	28.8		24 non, 26 IV
Median	57.5				28.0

VC=Virtual colonoscopy; St=Renal stone/flank pain protocol, IV=routine portal venous post contrast images