Measurement of Lung/Thorax
Transverse Area Ratio (L/T)

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Measurements are performed on the transverse section of the thorax near four-chamber view.

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Diaphragmatic hernia

normaldiaphragmatic hernia
　　　　　　　　
L/T=Lr+Ll/T（Normal: 0.52±0.04）
Lr: right lung, Ll: left lung, T: thorax, H: heart, Sp: spine, I: intestine

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Cystic lung disease


pulmonary sequestration (left)

L/T=Lr＋Ll/T
Lr: right lung, Ll: left lung (normal part), H: heart, Sp: spine