权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

三次元セファログラムの開発

三维头颅像的发展

基本信息

批准号：
15791153
负责人：
佐藤正樹
金额：
$ 2.24万
依托单位：
Osaka Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

平成15,16年度にわたり,3D-CTデータ(DICOM形式)を工業界で汎用されているSTL形式のポリゴンデータに変換するソフトウエアを購入し,三次元セファログラムをシステムとして確立した.1.CT撮影条件の決定:スライス厚1mm,スライス間隔1mm,管電圧120kV,管電流150凾,Matrix 512×512,FOV 16cmとし,ヘリカルスキャンから咬合平面にほぼ平行なAxial像を再構成した.2.頭蓋顔面系の基準座標の設定:左右側外耳道上縁に2点の後方基準点を設定した.前方基準点を設定するために,左右側眼窩下縁と左右側眼窩内側縁に解剖学的標点を置いた.頭蓋の正中矢状面を決定するために,眼窩内側縁を結んだ線分の中点を通り,後方基準点を結んだ直線に垂直な平面を作成し,平面と眼窩下縁を結んだ直線との交点を前方基準点とした.後方基準点を結んだ直線をy軸,前方基準点を通りy軸に垂直な直線をx軸,x軸とy軸の交点を通り2軸に垂直な直線をz軸とし,頭蓋に対して前方をx軸の正方向,左方をy軸の正方向,上方をz軸の正方向とする基準座標を右手座標系にて設定した.シリコーンバイトの三次元構築データおよびCTデータから抽出した頭蓋顔面骨の三次元構築データを同一座標系で評価するために,テフロン球をマーカーとして,それぞれの計測データにフィットさせた対応する3組のNURBS球について,中心間の二乗平均距離が最小となる位置を最適化によって求め,CADコンピュータ上でマーカーレジストレーションを行った.3.計測パラメータの決定:口腔内の三次元的な咬合状態を解析するパラメータとして,上下顎歯間距離60μm以下の咬合接触域の抽出,咬合接触域の面積・傾斜方向の算出,および習慣性咬合位と咬頭嵌合位の2種類のシリコーンバイトを用いた下顎変位の定量化法を考案した.

In Pingcheng 15BI 16, 3D-CT equipment (in the form of DICOM) was used in the industrial industry. In the form of STL, the industry industry decided: thick 1mm, thin film 1mm, tube 120kV, tube current 150V, Matrix 512 × 512, tube current 150V, Matrix 512 × 512, Ct camera conditions. The occlusal plane is paralleled and the Axial image is reconstructed. 2. The base point setting is set after 2 o'clock on the left and right external auditory canal. The reference point in the front is set, and the anatomy of the left and right eyes is set. In the middle of the sagittal plane, the central sagittal plane determines the alignment, the intraocular lens results in the midpoint, the rear base point is straight, the vertical plane is straight, and the plane is under the eye, the straight line intersection point is the front base point. The rear datum point is straight, the front datum point is straight, the front datum point is vertical, the intersection point is 2, the front is straight, the left is positive, the upper base is straight, the right-hand seat is the indicator. Do you know what to do in the third dimension? in the third dimension, you know, in the CT, in the third dimension, in the same flag, in the same label, in the same system, in the same system. The average distance between centers is two feet away from each other. The minimum distance between centers is optimized. The location of the minimum distance between the centers is optimized. 3. The average distance between centers is very small, and the location of the minimum distance between centers is the most efficient. 3. The average distance between centers is two minutes away from each other, and the location of the minimum distance between centers is optimized. 3. The purpose of this study is to determine that the three-dimensional occlusal status of the oral cavity is analyzed, and the upper and lower occlusal contact area is extracted from the occlusal contact area with a distance of less than 60 μ m. The occlusal contact area is calculated by the oblique direction of the occlusal contact area, and the occlusal position of the occlusal position is calculated.