Fast algorithm for detection of reference spheres in digital panoramic radiography

Comput Biol Med. 2009 Jul;39(7):615-9. doi: 10.1016/j.compbiomed.2009.04.004. Epub 2009 May 23.


In this paper, an algorithm for detection of reference spheres from digital panoramic radiographic images is presented. The proposed algorithm was tested on a database of 107 digital panoramic radiographic images which were used for dental diagnostics. Results show that the proposed method exhibits for detection of reference spheres, a sensitivity of 97.33% and specificity of 93.85%. Performance time differed between 0.55 and 2.36s depending on image size. The aim of this work was to provide a fast ellipse detection algorithm to reduce measuring time on preoperative implant planning by lowering the computational cost.

Publication types

  • Comparative Study
  • Evaluation Study

MeSH terms

  • Algorithms*
  • Dental Implantation / statistics & numerical data
  • Diagnosis, Computer-Assisted / statistics & numerical data
  • Humans
  • Radiography, Dental, Digital / statistics & numerical data*
  • Sensitivity and Specificity
  • Software
  • Surgery, Computer-Assisted / statistics & numerical data