title: Method of Individual Adjustment for 3D CT Analysis: Linear Measurement.
abstract: Introduction. We aim to regularize measurement values in three-dimensional (3D) computed tomography (CT) reconstructed images for higher-precision 3D analysis, focusing on length-based 3D cephalometric examinations.Methods. We measure the linear distances between points on different skull models using Vernier calipers (real values). We use 10 differently tilted CT scans for 3D CT reconstruction of the models and measure the same linear distances from the picture archiving and communication system (PACS). In both cases, each measurement is performed three times by three doctors, yielding nine measurements. The real values are compared with the PACS values. Each PACS measurement is revised based on the display field of view (DFOV) values and compared with the real values.Results. The real values and the PACS measurement changes according to tilt value have no significant correlations (p> 0.05). However, significant correlations appear between the real values and DFOV-adjusted PACS measurements (p< 0.001). Hence, we obtain a correlation expression that can yield real physical values from PACS measurements. The DFOV value intervals for various age groups are also verified.Conclusion. Precise confirmation of individual preoperative length and precise analysis of postoperative improvements through 3D analysis is possible, which is helpful for facial-bone-surgery symmetry correction.
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Dong Kyu
authors.identifier: 0000-0003-1679-8654
authors.initials: DK
authors.lastname: Kim
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Dong Hun
authors.initials: DH
authors.lastname: Choi
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Jeong Woo
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Jung Dug
authors.initials: JD
authors.lastname: Yang
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Ho Yun
authors.initials: HY
authors.lastname: Chung
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Byung Chae
authors.initials: BC
authors.lastname: Cho
authors.affiliation: Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Kang Young
authors.identifier: 0000-0002-7735-1939
authors.initials: KY
authors.lastname: Choi
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007223:Infant; D007231:Infant, Newborn; D016014:Linear Models; D008953:Models, Anatomic; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D012044:Regression Analysis; D015203:Reproducibility of Results; D012886:Skull / Q000000981:diagnostic imaging; D014025:Titanium / Q000737:chemistry; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D014025:Titanium