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      A Computerized Image Analysis System for Estimating Tanner-Whitehouse 2 Bone Age

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          A method for assigning Tanner-Whitehouse 2 skeletal maturity scores (or bone ages) to hand-wrist X-rays by an image analysis computer system is described. An operator positions the relevant area of the X-ray on a light box beneath a video camera. Correct positioning is assured by computer templates of each bone stage. Thereafter the process is automatic; the computer, not the operator, rates the bones. The system produces continuous stage scores, not discrete ones such as B, C or D. Data are given which show that the computer-assisted skeletal age score is more repeatable than the usual manual (or unassisted) rating. The absolute difference between duplicates averaged 0.25 stages; differences of as much as 1.0 stage occurred in only 3% of duplicates compared with 15% obtained in manual ratings.

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          Author and article information

          Horm Res Paediatr
          Hormone Research in Paediatrics
          S. Karger AG
          05 December 2008
          : 42
          : 6
          : 282-287
          aWHO Collaborative Centre for Growth and Development, Institutes of Education and Child Health, University of London, UK; bEpidemiology Research Center, School of Public Health, University of Texas, Houston, Tex., and cDepartment of Psychiatry and Biometry, University of Illinois at Chicago, Ill., USA
          184210 Horm Res 1994;42:282–287
          © 1994 S. Karger AG, Basel

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          Pages: 6
          Original Paper


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