일반두부방사선계측사진과 디지털방사선계측사진의 계측점 식별의 오차 및 재현성에 관한 비교 연구
The comparison of landma가 identification errors and reproducibility between conventional lateral cephalometric radiography and digital lateral cephalometric radiography
이양구, 양원식, 안지훈,
소속 상세정보
이양구 ( ) - 서울대학교 치과대학 교정학교실
양원식 ( ) - 서울대학교 치과대학 교정학교실
안지훈 ( ) - 서울대학교 치과대학 교정학교실
KMID : 0361920020320020079
Abstract
The purpose of this study is to evaluate the reproducibility and errors in landmark identification of conventional laterals cephalometric radiography and digital lateral cephalometric radiography.
Fifteen conventional lateral cephalometric radiographs and fifteen digjtal lateral cephalometric radiographs were selected in adults with no considerations on sex and craniofacial forms. Each landmark !was identified and expressed as the coordinate (x, y). The landmarks were classified into 3 groups. The landmarks of the first identification was Tl, identification after one week was T2, and identification after one month was T3.
The mean and standard deviation of identification errors between replicates were calculated according to the x and y coordinates. The errors between first identification and second identification were expressed as T2-T1(x), 12-TI(y) and those between first identification and third identification were expressed as T3-Tl(x), T2-T1(y). Each was divided into conventional lateral cephalometric radiography and digital lateral cephalometric radiography. The independent t- test was used for statistical analysis of identification errors for the evaluation of reproducibility.
The results of this study were as follows ;
1. Generally, the mean and standard deviation of landmark identification errors in digital lateral cephalometric radiography was smaller than those of conventional lateral cephalometric radiography.
2. Only a few landmarks showed statistically significant difference in identification error between conventional lateral cephalometric radiography and digital lateral cephalometric radiography.
3. The enhancement of image quality didn´t guarantee decrease in landmark identification error and didn´t affect tendency of landmark identification error.
키워드
일반두부방사선계측사진;디지털두부방사선계측사진;계측점;오차;Conventional lateral cephalometric radiography;Digital lateral cephalometrio radiography;Landmark;Error
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