2016
DOI: 10.1155/2016/6893072
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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 b… Show more

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Cited by 4 publications
(4 citation statements)
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References 25 publications
(21 reference statements)
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“…Accordingly, the ratio for each length was calculated for comparison by dividing the value of the SS, not the measured length, by the value of the LS. 12 The volume of the bilateral masticatory muscles was determined using the Aquarius iNtuition program (Ver.4.4.13.P2, TeraRecon Inc, Durham, NC) to identify the position of the temporalis, masseter, medial pterygoid, and lateral pterygoid in the axial view on the horizontal plane of 3DCT images, and the volume was measured by directly entering the muscle boundary into the program (Fig. 3).…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Accordingly, the ratio for each length was calculated for comparison by dividing the value of the SS, not the measured length, by the value of the LS. 12 The volume of the bilateral masticatory muscles was determined using the Aquarius iNtuition program (Ver.4.4.13.P2, TeraRecon Inc, Durham, NC) to identify the position of the temporalis, masseter, medial pterygoid, and lateral pterygoid in the axial view on the horizontal plane of 3DCT images, and the volume was measured by directly entering the muscle boundary into the program (Fig. 3).…”
Section: Methodsmentioning
confidence: 99%
“…Accordingly, the ratio for each length was calculated for comparison by dividing the value of the SS, not the measured length, by the value of the LS. 12…”
Section: Methodsmentioning
confidence: 99%
“…In this study,the computed tomographywas used because it is an accurate imaging modality.Inherent high-contrast resolution of computed tomographyled to a distinction between tissues that differ in the physical density by less than 1%;while a distinction between tissues in conventional radiography requires a 10% difference in the physical density (17)In contrast to 2D cephalometric radiography, three dimensionalcomputed tomography gave accurate values for angular measurements (18). Distortion and magnificationare the major disadvantages of panoramic imageslimiting the dimensional accuracy (19).…”
Section: Discussionmentioning
confidence: 99%
“…Measurement with CT may vary because of tilt vibration resulting from changes in the posture of patients or varied positions of the elbow inside the machine [19]. Thus, an arm support system was prepared for the capturing of images in all patients, ensuring consistent positioning inside the CT machine; adjustments were made for consistency with the posture during x-ray imaging of the cubital tunnel.…”
Section: Imaging Techniques Patient Positioningmentioning
confidence: 99%