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Table 1 Patient cohort characteristics (n = 49)

From: Improved precision of noise estimation in CT with a volume-based approach

Characteristic Value
Age (years) 66 ± 7
Sex 34 males (69%), 15 females (31%)
Body mass index (kg/m2) 28.0 ± 5.3
FEV1 (% of predicted) 53 ± 16
FEV1/FVC (%) 42.4 ± 11.2
CTDIvol (mGy), regular CT protocol 3.04
DLP (mGy × cm), regular CT protocol 105.1 (86.3−134.1)
CTDIvol (mGy), ultra-low dose CT protocol 0.38 (0.19−1.06)
DLP (mGy × cm), ultra-low dose CT protocol 16.6 (7.3−29.8)
  1. Values are given as mean ± standard deviation or median (range), unless stated otherwise. To facilitate comparison, the DLP for the regular-dose CT is expressed as median (range), despite a normal distribution (p = 0.103). CT computed tomography, FEV1 forced expiratory volume in 1 s; FVC forced vital capacity, CTDIvol volumetric CT dose index, DLP dose length product