Development of computed panoramic radiography using limited projection data

使用有限投影数据开发计算机全景放射线摄影

• 批准号: 11671888
• 负责人: ARAI Yoshinori
• 金额: $ 1.66万
• 依托单位: Nihon-University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671888/
• 关键词: CT; dental; Panorama; X-ray; エックス腺; X線; 回転パノラマ投影; コンピュータ; ディジタル

Development of computed panoramic radiography using limited projection data The rotational panoramic radiography can take panoramic view of the whole jaw on the only one film. The system is popular in the general practitioners of dental office. But sometime the image can not be diagnosed because of fog, distortion and ghost images on the incisor by the vertebra.I showed the new method about computed panoramic radiography using limited projection data in 39^<th> Japan oral radiology annual meeting at 1998. The limited projection data is recorded into the computer on this method. And it is proved mathematically that the data is back-projected after reduced from ghost and fog by the new filter function. Then the panoramic view without ghost and fog, distortion and ghost may be reconstructed by this method.I developed the new software for reconstruction of the panoramic view using this theory which give us improved tomogram. However the reconstructing time takes over 1 hour. Which is some problem on the clinical use.In this study, The software was optimized. As a result the image reconstruction time was reduced to about 20 minutes even by using personal computer (Pentium 1GHz).

利用有限投影数据的计算机全景X线摄影技术的发展旋转全景X线摄影可以在一张胶片上拍摄整个颌骨的全景图像。该系统在牙科诊所的全科医生中很受欢迎。在1998年第39届日本口腔放射学年会上，我提出了一种利用有限的投影数据进行计算机全景X线摄影的新方法<th>。该方法将有限的投影数据录入计算机。并从数学上证明了新的滤波函数消除了鬼影和雾后的数据是反投影的。利用该方法可以重建出无重影、无雾、无畸变、无重影的全景图，并利用该原理开发了一套新的全景图重建软件，得到了较好的断层图像。然而，重建时间需要超过1小时。本研究对该软件进行了优化。结果，即使使用个人计算机（奔腾1GHz），图像重建时间也减少到约20分钟。

项目成果

ARAI Y.,HASHIMOTO K.,SHINODA K.: "Development of 3-D surface display program for limited cone beam CT (Ortho-CT)"Oral and Maxillofacial Radiology Today (Elsevier Ams). 108-112 (2000)

ARAI Y.、HASHIMOTO K.、SHINODA K.：“有限锥形束 CT (Ortho-CT) 的 3-D 表面显示程序的开发”今日口腔颌面放射学 (Elsevier Ams)。

新井嘉則,篠田宏司,橋本光二,田中良明: "小照射野三次元X線CT(Ortho-CT)による中耳および内耳の画像"断層映像研究会雑誌. 27. 72-76 (2000)

Yoshinori Arai、Koji Shinoda、Koji Hashimoto、Yoshiaki Tanaka：“使用小视野三维 X 射线 CT (Ortho-CT) 的中耳和内耳图像”断层成像研究组杂志 27. 72-76。 (2000)

Arai Y.: "Optimum Limited cone beam CT (Ortho-CT) for Dental use"J.Japan Dental Assosiation. 53. 15-24 (2000)

Arai Y.：“牙科用最佳有限锥形束 CT（Ortho-CT）”J.日本牙科协会。

Arai Y.: "3D images for Dntal use"Jpn.Dent.Radiol. 41(in press). (2001)

Arai Y.：“Dntal 使用的 3D 图像”Jpn.Dent.Radiol。

新井嘉則: "歯科医療に最適化された小照射野X線CT(Ortho-CT)"日本歯科医師会雑誌. 53. 15-24 (2000)

Yoshinori Arai：“针对牙科护理优化的小视野 X 射线 CT (Ortho-CT)”日本牙科协会杂志 53. 15-24 (2000)。