@article{oai:niigata-u.repo.nii.ac.jp:00025740,
 author = {中川, 公貴 and 寺田, 員人 and 稲見, 佳大 and Gramaticescu, Carmen-Elena and 森田, 修一 and 花田, 晃治},
 issue = {2},
 journal = {新潟歯学会雑誌, 新潟歯学会雑誌},
 month = {Dec},
 note = {Non-contacting three-dimensional optical surface scanner has not only high measurement accuracy, but also a short measurement time and no radiation exposure. It offers an appropriate method for recording materials in case of jaw deformity, in cleft palate subjects, and most regularly pre-and post-orthodontic soft tissue changes, in addition to facial growth. Therefore knowing the exact characteristics of this recording method is of utmost importance. This study was designed to assess the method error or accuracy that occured during registration with laser scanning, in addition to clarify registration characteristic for optimizing image quality, and minimizing distortion. Surface images for a mannequin, and five volunteers were taken twice on the same day. Registration method was standardized for all. The resulting three-dimensional images and data were used to superimpose the double taken images using special analyzing software (3D RUGLE, Medic Engineering). The double taken curved surface data were almost identical. Images obtained from the mannequin, showed 97% of retaken areas to be fit within +/- 0.5mm of the initial images. Subjects the images showed 86-93% fit to the retaken images. Areas showing less fit were those lateral and inferior to the nose ridge, alar grooves and areas on the boundary/edge of the face. For obtaining a more reliable data, taking images from different angles, and unifying the new data with the one obtained from the frontal view would eliminate these distortions and increase validity of areas registered., 非接触型三次元表面形状計測器は、精度が高く、被験者に与える侵襲がほとんどなく、短時間で計測できるため、顎変形症や口蓋裂を有する患者などの顔面計測を行う際に有効な装置であると言われている｡これらの装置を用いて、矯正治療前後あるいは成長に伴う顔面の表面形状変化についてより正確な分析を行うためには、装置の客観的な特性を知る必要がある｡そこで本研究は、非接触型顔面三次元表面形状計測装置によりマネキン1体と被験者5名の顔面計測における誤差を解析し､本装置の計測時の特性と本装置の有用性について検討を行った｡各被験者ならびにマネキンについて正面から2回の計測を行い、それらの三次元データを重ね合わせて、計測器方向の誤差を算出した｡その結果、2回の計測値間の誤差が±0.5mm以内にある領域は、マネキンで97%、被験者で86～93%であった｡この領域は、額部、口唇、左右側外眼角より内方の頬部、鼻部の大部分であり、矯正治療等による三次元表面形状の変化を正面から計測することで評価できることが示唆された｡さらに、顔面計測において、非触型三次元表面形状計測器のレーザー光の照射方向に対して､皮膚面が平行に近い面やアンダーカットになる部分すなわち鼻や顔の輪郭付近においては、計測方向を変えて計測したデータと統合することにより精度を高められると考える。},
 pages = {19--23},
 title = {非接触型顔面三次元表面形状計測装置の計測特性に関する検討},
 volume = {31},
 year = {2001}
}