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Haller index

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Calculated on a CT scan by obtaining the ratio of the horizontal distance of the inside of the ribcage and the shortest distance between the vertebrae and sternum.

 

Normal Haller index = 2.5

Haller Index > 3.25 is considered as severe pectus excavatum

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Pectus excavatum Haller-index-Pectus-excavatum

Haller-index-Pectus-excavatum