January 6, 2023

Diameter of main pulmonary artery on CT

Main pulmonary artery diameter of >3.3cm may be a sign of pulmonary hypertension (measure the diameter at the level of right pulmonary artery’s bifurcation) Reference:
January 3, 2023

Size of cardiac chambers on CT

Left Atrium (AP diameter) ≤ 45mm in women and ≤ 50mm in men Left Ventricle (transverse diameter) ≤ 55mm in women and ≤ 60mm in men […]
December 7, 2022

Osteopenia (Attenuation of L1)

CT attenuation of body of L1 in osteopenia is <135 HU Reference: 1. Yang, G., Wang, H., Wu, Z. et al. Prediction of osteoporosis and osteopenia by routine […]
November 2, 2022

Paratracheal stripes

Right paratracheal stripe thickness <5mm Left paratracheal strip: usually not seen References:
November 2, 2022


Normal spleen size: <12cm (up to 14cm in taller patients) Mean splenic volume: 290 cm3 Splenomegaly >14cm (in any orientation)
Liver size
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