| 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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