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. Author manuscript; available in PMC: 2018 Aug 1.

Published in final edited form as: Emerg Radiol. 2017 Mar 14;24(4):369–376. doi: 10.1007/s10140-017-1487-5

Table 3.

Attenuation (HU) in selected ROIs and study dose descriptors displayed as mean ± standard deviation

	Standard-dose ASIR	Ultralow-dose ASIR	Ultralow-dose MBIR
Pectoralis	28.9 ± 18.6	77.3 ± 18.2	20.0 ± 3.6
Anterior mediastinum	35.0 ± 21.2	82.9 ± 21.5	22.1 ± 4.7
Axilla	41.0 ± 20.9	78.7 ± 21.2	26.2 ± 4.9
Paraspinal	40.1 ± 20.4	108.3 ± 19.2	24.9 ± 5.3
DLP (mGy × cm)	96.8 ± 50.6	7.5 ± 2.9
CTDI_vol (mGy)	3.2 ± 1.4	0.2 ± 0.08
SSDE (mGy)	4.9 ± 2.0	0.4 ± 0.1

ASIR = Adaptive Statistical Iterative Reconstruction, MBIR = Model Based Iterative Reconstruction.