| 牙片中骨量与灰度的关系及灰阶的改进 |
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| 引用本文： | 周爽英,张刚.牙片中骨量与灰度的关系及灰阶的改进[J].现代口腔医学杂志,1997,11(1):34-36. |
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| 作者姓名： | 周爽英 张刚 |
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| 作者单位： | 北京医科大学口腔医学院牙周科 100081 |
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| 基金项目： | 本研究为卫生部重点项目基金资助 |
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| 摘 要： | 本文对较小厚度范围内颌骨、金属铝在X片上的灰度水平与厚度变化关系进行了探讨,提出在数字减影牙片中以金属铝制成均匀楔形灰阶,代替传统金箔制成的台阶式灰阶.
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| 关 键 词： | 骨厚度 灰度 灰阶 |
A Study of Relation Between Bone Volume and Gray Level in Periapical Radiographs and Improvement of Gray Stepwedge |
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| Zhou Shuangying,Zhang Gang,Cao CaifangDept. of Periodontology. Dept. of Radiology College of Stomatology,Beijing Medical University.A Study of Relation Between Bone Volume and Gray Level in Periapical Radiographs and Improvement of Gray Stepwedge[J].Journal of Modern Stomatology,1997,11(1):34-36. |
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| Authors: | Zhou Shuangying Zhang Gang Cao CaifangDept of Periodontology Dept of Radiology College of Stomatology Beijing Medical University |
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| Abstract: | To improve the gray stepwedge, the gray level of bone and pure aluminum wedge were studied with thickness of wedge (0 -8mm) increasing. The results showed both of them represented good linear relations and no statistical difference existed between their linear relations, demonstrating their similar blocking ability to X -ray. Conclusion: Replacement of the gold stepwedge with a continuous wedge of aluminum will yield more precise and efficient reference for DSR. |
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| Keywords: | bone thickness gray level gray stepwedge |
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