中骨线 center creottom line ; center creautomotive service engineers line
胸骨线 [解剖] sternal line ; [解剖] linea sternalis ; Lateral sternal line
龙骨线 keel line ; keel-line
肋骨线 frame line ; frame stations ; costal line ; rib-line
肋骨线坐标 frame offset
龙骨线倾角 keel gradient
理论肋骨线周长 liner girth
纵挠龙骨线 rocker keel line
目的测量下颌角整形截骨线周围骨质的厚度，为手术提供解剖学依据。
Objective To measure the mandibular thickness relative to the osteotomy line of mandibular angle plasty so that to provide the anatomical basis for operation.
结论曲面断层摄影各部位变形失真率不同，这为指导临床工作，如颌骨畸形矫正术中截骨线位置的确定。
Conclusion Distortion at the different parts of the orthopantomograph is different, therefore, the result should be beneficial for the clinicians in determination of bone cut of orthognathic surgery.
第一种是适用于叶片骨线为任意曲线的逐点计算法；第二种是适用于叶片骨线为有规则线段的骨线绘图法。
The first one applies to point by point calculation of blade spine consisting of a random curve and the second one is for blade spine consisting of regular line sections.
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