디지털 측방두부규격방사선사진과 MDCT의 3차원 재구성 영상을 이용한 합성측방두부규격방사선사진의 계측치 비교 및 머리 위치가 미치는 효과 (Comparison of measurements from digital cephalometric radiographs and 3D MDCT-synthetized cephalometric radiographs and the effect of head position)

서지정보

· 발행기관 : 대한영상치의학회
· 수록지 정보 : Imaging Science in Dentistry / 39권 / 3호 / 133 ~ 147페이지
· 저자명 : 김미자, 최보람, 허경회, 이원진, 허민석, 이삼선, 최순철

초록

Purpose : To investigate the reproducibilities and compare the measurements in digital and MDCT-synthesized cephalometry, and to investigate the effect of head position on the measurement during imaging with MDCT.
Materials and Methods : Twenty-two dry skulls (combined with mandible) were used in this study. Conventional digital cephalometry was taken in standard position, and MDCT was taken in standard position and two rotated position (10left rotation and 10right tilting). MDCT data were imported in OnDemand® and lateral cephalometry were synthesized from 3D virtual models. Two types of rotated MDCT data were synthesized with default mode and with corrected mode using both ear rods. For all six cephalometries, sixteen angular and eleven linear measurements were made in V-Ceph® three times. Reproducibility of measurements was assessed using repeated measures ANOVA and ICC. Linear and angular measurements were compared between digital cephalometry and five MDCT-synthesized cephalometries by Student t-test.
Results : All measurements in six types of cephalometry were not statistically different under ICC examination. Measurements were not different between digital and MDCT-synthesized cephalometries (P¤0.05). Measurements in MDCT-synthesized cephalometry in 10left rotation or 10right tilting position showed possibility of difference from digital cephalometry in some measurements, and possibility of improvement via realignment of head position using both ear rods.
Conclusions : MDCT-synthesized cephalometry can substitute conventional cephalometry. The error on head position during imaging with MDCT have possibility that can produce measurement errors with MDCT-synthesized cephalometry, and these position error can be corrected by realignment of the head position using both ear rods.

영어초록

Purpose : To investigate the reproducibilities and compare the measurements in digital and MDCT-synthesized cephalometry, and to investigate the effect of head position on the measurement during imaging with MDCT.
Materials and Methods : Twenty-two dry skulls (combined with mandible) were used in this study. Conventional digital cephalometry was taken in standard position, and MDCT was taken in standard position and two rotated position (10left rotation and 10right tilting). MDCT data were imported in OnDemand® and lateral cephalometry were synthesized from 3D virtual models. Two types of rotated MDCT data were synthesized with default mode and with corrected mode using both ear rods. For all six cephalometries, sixteen angular and eleven linear measurements were made in V-Ceph® three times. Reproducibility of measurements was assessed using repeated measures ANOVA and ICC. Linear and angular measurements were compared between digital cephalometry and five MDCT-synthesized cephalometries by Student t-test.
Results : All measurements in six types of cephalometry were not statistically different under ICC examination. Measurements were not different between digital and MDCT-synthesized cephalometries (P¤0.05). Measurements in MDCT-synthesized cephalometry in 10left rotation or 10right tilting position showed possibility of difference from digital cephalometry in some measurements, and possibility of improvement via realignment of head position using both ear rods.
Conclusions : MDCT-synthesized cephalometry can substitute conventional cephalometry. The error on head position during imaging with MDCT have possibility that can produce measurement errors with MDCT-synthesized cephalometry, and these position error can be corrected by realignment of the head position using both ear rods.

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