Table 2. L2 bone mineral density and their statistics under different mAs and different iterative algorithms.

Algorithms	20 mAs	30 mAs	40 mAs	50 mAs	60 mAs	P
FBP	97.94	98.29	98.23	98.57	98.08	0.146
iDose4 [1]	101.83	100.4	100.27	100.13	99.51	0.137
iDose4 [2]	101.44	101.12	100.4	99.88	99.75	0.37
iDose4 [3]	101.77	100.87	99.81	100.39	100.04	0.163
iDose4 [4]	101.42	100.45	100.05	100.49	100.28	0.12
iDose4 [5]	101.62	101.25	99.85	100.68	99.71	0.129
iDose4 [6]	101.84	101.21	100.45	99.92	99.45	0.064
IMR [1]	100.85	99.49	99.19	99.15	99.13	0.229
IMR [2]	100.8	99.91	99.21	98.81	98.98	0.08
IMR [3]	100.15	99.23	98.75	98.77	98.65	0.194
P	0.051	0.061	0.076	0.079	0.075	–

FBP, filtered back projection; IMR, iterative model reconstruction.