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Three-dimensional soft tissue landmark detection with marching cube algorithm

 Yoonjung Lee  ;  Ji-Min Lee  ;  Sun-Hyung Park  ;  Yoon Jeong Choi  ;  Sung-Hwan Choi  ;  Jae Joon Hwang  ;  Hyung-Seog Yu 
 SCIENTIFIC REPORTS, Vol.13(1) : 1544, 2023-01 
Journal Title
Issue Date
Algorithms* ; Cephalometry / methods ; Cone-Beam Computed Tomography / methods ; Humans ; Imaging, Three-Dimensional* / methods ; Lip / diagnostic imaging ; Reproducibility of Results
Current method of analyzing three-dimensional soft tissue data, especially in the frontal view, is subjective and has poor reliability. To overcome this limitation, the present study aimed to introduce a new method of analyzing soft tissue data reconstructed by marching cube algorithm (Program S) and compare it with a commercially available program (Program A). Cone-beam computed tomography images of 42 patients were included. Two orthodontists digitized six landmarks (pronasale, columella, upper and lower lip, right and left cheek) twice using both programs in two-week intervals, and the reliability was compared. Furthermore, computer-calculated point (CC point) was developed to evaluate whether human error could be reduced. The results showed that the intra- and inter-examiner reliability of Program S (99.7-100% and 99.9-100%, respectively) were higher than that of Program A (64.0-99.9% and 76.1-99.9%, respectively). Moreover, the inter-examiner difference of coordinate values and distances for all six landmarks in Program S was lower than Program A. Lastly, CC point was provided as a consistent single point. Therefore, it was validated that this new methodology can increase the intra- and inter-examiner reliability of soft tissue landmark digitation and CC point can be used as a landmark to reduce human error.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Park, Sun Hyung(박선형) ORCID logo https://orcid.org/0000-0002-5293-875X
Yu, Hyung Seog(유형석) ORCID logo https://orcid.org/0000-0002-1275-5078
Choi, Sung Hwan(최성환) ORCID logo https://orcid.org/0000-0002-1150-0268
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
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