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. Author manuscript; available in PMC: 2016 Dec 19.
Published in final edited form as: Australas Phys Eng Sci Med. 2014;37(3):483–493. doi: 10.1007/s13246-014-0276-7

Table 2.

Mean attenuation values in ROI

LDCT25% LDCT50% SDCT Processed LDCT50% Processed LDCT25%
GM mean (HU) 33.77 ± 0.88 33.42 ±1.15 33.38 ± 0.93 33.19 ± 0.99 33.47 ± 0.94
WM mean (HU) 27.72 ±1.32 27.30 ±1.08 27.00 ±1.16 27.43 ±1.03 27.43 ±1.40
CSF mean (HU) 5.14 ± 0.17 5.55 ± 0.33 5.50 ± 0.03 5.62 ± 0.23 5.66 ± 0.41