Calculation of the haller index and correction index from axial images of chest computed tomography scans of pectus cases.

Anatomic schematic of the lateral view of the thorax (A) demonstrating the position of the T6 and T8 vertebral bodies relative to the body of the sternum and the superior xiphoid process. Measurements of chest wall dimensions (red lines) used to calculate the Haller Index (B) and Correction Index (C) from a patient with pectus excavatum (left) and a patient with pectus carinatum (right). Measurements in B and C are shown at the level of the superior xiphoid. Haller (D) and Correction (E) Index measurements of patients with pectus excavatum (PE, n = 274, blue circles), pectus carinatum (PC, n = 19, red triangles) and those with a mixed pectus excavatum and carinatum defect (Mixed, n = 4, orange diamonds) at the level of T6, T8, Superior Xiphoid, as well as the point of maximal (max.) sternal depression (n = 278) or protrusion (n = 23). Patients with a mixed defect are included in both the maximal sternal depression and protrusion data sets. Box and whisker plots (black) are superimposed.