Table 2. Dose metrics of standard dose compared to reduced dose images.

Patient #	DLP SD	DLP RD	Eff dose SD	Eff dose RD	CTDI vol SD	CTDI vol RD	Effective Diam	SSDE SD	SSDE RD
1	519.56	132.14	7.79	1.98	10.88	2.76	37.22	10.34	2.62
2	178.77	23.43	2.68	0.35	3.63	0.48	28.82	4.65	0.61
3	56.95	15.93	0.85	0.24	1.43	0.40	25.27	2.12	0.59
4	169.15	36.51	2.54	0.55	3.68	0.79	30.83	4.38	0.94
5	287.15	60.00	4.31	0.90	5.88	1.23	33.46	6.47	1.35
6	304.16	64.62	4.56	0.97	6.20	1.32	31.21	7.38	1.57
7	88.00	19.10	1.32	0.29	2.03	0.44	27.78	2.68	0.58
8	109.74	25.89	1.65	0.39	2.47	0.59	25.86	3.53	0.84
9	111.07	23.61	1.67	0.35	2.23	0.48	27.67	2.94	0.63
10	203.01	42.40	3.05	0.64	4.09	0.85	31.71	4.66	0.97
11	435.40	59.89	6.53	0.90	10.31	1.42	29.17	13.20	1.82
12	266.81	59.81	4.00	0.90	6.67	1.50	25.66	9.54	2.15
13	346.66	64.75	5.20	0.97	8.05	1.50	27.68	10.63	1.98
14	294.36	63.73	4.42	0.96	7.31	1.58	28.71	9.36	2.02
15	332.51	62.69	4.99	0.94	7.95	1.50	29.63	9.78	1.85
16	686.53	109.93	10.30	1.65	16.60	2.66	33.03	18.26	2.93
17	471.30	73.76	7.07	1.11	9.80	1.53	30.41	12.05	1.88
18	242.67	61.71	3.64	0.93	5.97	1.52	25.76	8.54	2.17
19	535.47	85.09	8.03	1.28	12.87	2.04	30.93	15.32	2.43
20	343.32	63.56	5.15	0.95	7.50	1.39	28.83	9.60	1.78
21	1070.04	426.86	16.05	6.40	21.26	8.48	35.49	21.69	8.65
22	152.25	43.35	2.28	0.65	4.54	1.29	27.01	6.22	1.77
23	197.63	62.26	2.96	0.93	4.85	1.53	26.07	6.94	2.19
24	751.06	296.87	11.27	4.45	14.33	5.66	31.49	17.05	6.74
25	1216.92	485.10	18.25	7.28	25.71	10.25	32.65	28.28	11.28
26	433.15	112.84	6.50	1.69	14.51	3.78	31.05	17.27	4.50
27	1258.40	154.51	18.88	2.32	32.09	3.94	34.24	34.02	4.18
28	674.62	287.62	10.12	4.31	35.30	15.05	32.24	40.24	17.16
29	1453.71	481.66	21.81	7.22	79.83	26.45	38.02	73.44	24.33
30	339.89	65.23	5.10	0.98	7.72	1.48	24.69	11.43	2.19
31	464.36	73.76	6.97	1.11	10.06	1.60	28.69	12.88	2.05
32	546.19	212.68	8.19	3.19	11.69	4.55	29.22	14.96	5.82
33	350.56	65.75	5.26	0.99	7.85	1.47	29.55	9.66	1.81
34	1025.01	390.50	15.38	5.86	19.55	7.71	34.37	20.72	8.17
35	341.29	133.60	5.12	2.00	7.35	2.88	28.36	9.70	3.80
36	274.31	101.00	4.11	1.52	5.39	1.98	27.22	7.38	2.71
37	202.23	48.32	3.03	0.72	4.56	1.09	24.57	6.75	1.61
38	541.68	210.39	8.13	3.16	11.59	4.56	30.50	14.26	5.61
39	250.14	91.27	3.75	1.37	5.92	2.16	25.75	8.47	3.09
40	345.04	136.52	5.18	2.05	7.29	2.88	28.53	9.33	3.69
41	991.94	241.05	14.88	3.62	41.48	10.08	32.50	47.29	11.49
42	312.47	66.09	4.69	0.99	6.17	1.31	31.68	7.03	1.49
43	496.82	89.75	7.45	1.35	17.88	3.23	30.93	21.28	3.84
44	1233.24	149.20	18.50	2.24	34.22	4.14	34.68	34.90	4.22
45	344.56	134.37	5.17	2.02	7.10	2.77	28.98	9.09	3.55
46	543.57	212.41	8.15	3.19	10.93	4.35	30.37	13.44	5.35
47	212.55	63.62	3.19	0.95	4.70	1.41	24.92	6.96	2.09
48	724.09	289.04	10.86	4.34	15.80	6.31	32.98	17.38	6.94
49	556.30	214.24	8.34	3.21	10.67	4.18	31.79	12.16	4.77
50	1400.50	526.58	21.01	7.90	27.50	11.06	36.64	26.13	10.51
Mean	493.7	140.3	7.4	2.1	12.9	3.7	30.1	14.6	4.2
Median	345.8	79.43	5.2	1.2	7.9	1.8	30	10.1	2.3

SD=Standard dose, RD=reduced dose. DLP=Dose Length Product, Eff dose=effective dose, CTDIvoi=volume CT dose index, SSDE=Size specific Dose estimate.