Pectus excavatum can be measured on CT, taking the Haller Index. This is done by measuring the widest internal transverse diameter of the chest and dividing by the shortest AP diameter (anterior sternum to vertebral body). Most insurances will pay if ratio is greater then 3.25 and is associated with cardiac or pulmonary function abnormalities.
Normal is less than 2.56, mild to moderate is above 3.25.
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