STUDY ON A REAL-TIME PATTERN MEASUREMENT METHOD FOR BEAM DENSITY FIELDS FROM A FEW PROJECTIONS

几种投影束密度场实时图形测量方法研究

• 批准号: 06805034
• 负责人: TAYAMA Norio
• 金额: $ 1.22万
• 依托单位: IWATE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06805034/
• 关键词: Smooth density distribution; Imaging of section; A few projecting directions; Real time pattern measurement; Singular value decomposition

The study is concerned with developing a fast reconstruction method for Cyclotron beam section using projection data from a few directions. The point of this method is rapidly to reconstruct a beam section (64*64) from a few projections, using the Singular Value Decompositions and the Sampling Model Object. In the first year, we investigated a new algorithm for reconstructing high resolution image. The result of computer simulation based on the reconstruction algorithm was good. In the second year, we confirmd image reconstructions experimentally by means of the actual X-ray equipment. We used LED element or condenser for the object reconstructed. Projecting directions were 8. The (64*64) image reconstructed was good. The reconstruction time was only 0.2 Sec.Several experiments using the X-ray equipment made it obvious that there is a possibility that the reconstruction method comes into practical use.

该研究致力于开发一种利用多个方向的投影数据快速重建回旋加速器束流截面的方法。这种方法的要点是利用奇异值分解和采样模型对象，从几个投影快速重建出一个波束截面(*)。第一年，我们研究了一种新的高分辨率图像重建算法。基于该重建算法的计算机仿真结果良好。第二年，我们利用实际的X射线设备对图像重建进行了实验验证。我们使用LED元件或聚光器对物体进行重建。投射方向8个，重建的(*)图像良好。重建时间仅为0.2秒。在X光机上进行的几次实验表明，该重建方法具有实际应用的可能性。

项目成果

田山典男: "3方向又は4方向投影から加速器ビーム断面像強度分布を高速に画像化する一手法とその仕組" 画像電子学会誌. 24. 145-152 (1995)

Norio Tayama：“一种从 3 或 4 方向投影快速成像加速器光束横截面图像强度分布的方法和机制”，日本图像电子工程师学会杂志，24. 145-152 (1995)。

Norio TAYAMA: "A Fast Imaging Method for Cyclotron Beam Section from Three or Four Projections and its Structure" JOURNAL OF IIEEJ. 24. 145-152 (1995)

Norio TAYAMA：“三或四个投影回旋加速器光束截面的快速成像方法及其结构”IIEEJ 杂志。

Norio TAYAMA: "Fast Visualization for 3D Smooth Density Distribution from a few Projections" Proceedings of ASV'94. G16. 681-686 (1994)

Norio TAYAMA：“通过一些投影实现 3D 平滑密度分布的快速可视化”ASV94 论文集。

Norio TAYAMA: "Parallel Image Reconstruction Based on Line-by-Line Incremental Algorithm" IEICE TRANS.ON I.AND S.J79-D-II (APPEAR). (1996)

Norio TAYAMA：“基于逐行增量算法的并行图像重建”IEICE TRANS.ON I.AND S.J79-D-II（出现）。

田山典男: "緩やかな濃度分布に対する最小二乗法による非破壊検査" 非破壊検査(日本非破壊検査協会誌). 43. 435-443 (1994)

Norio Tayama：“使用最小二乘法进行渐进浓度分布的无损检测”无损检测（日本无损检测协会杂志）43. 435-443（1994）。