Normalized mean shapes and reference index values for computerized quantitative assessment indices of chest wall deformities

Ho Chul Kim, Man Sik Park, Seong Keon Lee, Ki Chang Nam, Hyung Joo Park, Min Gi Kim, Jae-Jun Song, Hyuk Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)


We previously proposed a computerized index (eccentricity index [EI]) for chest-wall deformity measurements, such as pectus excavatum. We sought to define mean shapes based on normal chest walls and to propose for computerized index reference values of that are used in the quantitative analysis of the severity of chest-wall deformities. A total of 584 patients were classified into 18 groups, and a database of their chest-wall computed tomography (CT) scan images was constructed. The boundaries of the chest wall were extracted by using a segmentation algorithm, and the mean shapes were subsequently developed. The reference index values were calculated from the developed mean shapes. Reference index values for the EI were compared with a conventional index, the Haller index (HI). A close association has been shown between the two indices in multiple subjects (r = 0.974, P <0.001). The newly developed mean shapes and reference index values supply both reliability and objectivity to the diagnosis, analysis, and treatment of chest-wall deformities. They promise to be highly useful in clinical settings.

Original languageEnglish
Pages (from-to)1868-1875
Number of pages8
JournalJournal of the Korean Physical Society
Issue number10
Publication statusPublished - 2015 Nov 1



  • Chest wall deformity
  • Eccentricity index
  • Haller index
  • Mean shape
  • Pectus excavatum
  • Reference index values

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this