| 垫定位根尖片与头颅定位翼片数字减影的比较 |
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| 引用本文： | 周爽英,曹采方,张刚,马绪臣.垫定位根尖片与头颅定位翼片数字减影的比较[J].北京大学学报(医学版),1997(4). |
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| 作者姓名： | 周爽英 曹采方 张刚 马绪臣 |
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| 作者单位： | 北京医科大学口腔医学院牙周科!100081(周爽英，曹采方)，北京医科大学口腔医学院放射科!100081(张刚，马绪臣) |
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| 摘 要： | 目的：探讨头颅固定架拍摄定位牙片的可行性。方法：选择9名牙周炎患者之24个双尖牙，重复拍摄■垫定位根尖片；选择两名牙周炎患者及6名健康志愿者之17个双尖牙，重复拍摄头颅固定架定位的■翼片，并对两种定位系统重复拍摄获得的24对、17对牙片进行数字减影分析，以比较两种技术所拍摄定位牙片的重复性。结果：头颅定位系统所摄的牙片减影后灰度明显小于■垫定位系统（P＜0.001）。头颅定位系统与■垫定位系统两次投照角度变化无显著性差别（P＞0．05）。结论：两种技术所摄系列牙片的重复性相近。
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| 关 键 词： | 牙／放射照像术 放射造影术／仪器和设备 诊断.计算机辅助 |
COMPARISON OF THE ANGULAR REPRODUCIBILITY BETWEEN STENT-ROD BASED AND EXTRA-ORAL PROJECTION SYSTEMS |
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| ZHOU Shuangying, CAO Cai fang, ZHANG Gang, MA Xuchen.COMPARISON OF THE ANGULAR REPRODUCIBILITY BETWEEN STENT-ROD BASED AND EXTRA-ORAL PROJECTION SYSTEMS[J].Journal of Peking University:Health Sciences,1997(4). |
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| Authors: | ZHOU Shuangying CAO Cai fang ZHANG Gang MA Xuchen |
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| Abstract: | Objective:The experiment aimed at studying the possibility of using extraoral system when serialradiograghs were taken. Methods: Using stent-rod based system and extra-oral system, 24 and 17 pairs ofradiograghs were taken respectively. The discrepancy of raproducibility was compared by digital subtraction.Results: The extra-oral system had the similar ability with stent-rod system in maintaining geometrycorrespondence. Conclusion: Extra-oral system for serial radiogrghs is feasible. |
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| Keywords: | Tooth/radiogr Radiography/instrum Diaguosis computer assisted |
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