Automatic matching of computed tomography and stereolithography data

S. Woo, S. Lee, J. Chae, J. Rim, J. Lee, J. Seo, C. Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Background and Objective: Computed tomography (CT) is one of the most frequently used medical imaging methods. An important application area of CT is dental implants, which require precise inspection and analysis of oral structures. Since CT provides a precise 3D model of the teeth, bones and nerves, it can be used as a surgical guide for dental implants. Along with CT, optical 3D images called stereolithography (STL) have also been widely used. STL images obtained from optical 3D images can be used to show the 3D surfaces of oral structures. Since CT data and STL data deploy different technologies to obtain dental information, we can obtain more accurate dental implants by combining the two datasets. Since the two datasets are acquired by using different sensors, the datasets need to be registered. Methods: An automatic matching algorithm is proposed for CT and STL image registration, which is based on depth maps and maximum intensity projection. Then, fine tuning was performed based on volume matching. Results: When applied to real-world databases, the proposed method provided an average matching error of 2.7 mm for the upper jaw and 2.3 mm for the lower jaw with an average processing time of about 19 s. Conclusions: The proposed method performs accurate registration of CT and STL.

Original languageEnglish
Pages (from-to)215-222
Number of pages8
JournalComputer Methods and Programs in Biomedicine
Publication statusPublished - 2019 Jul

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Science Applications
  • Health Informatics


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