基于小波变换的多分辨率锥束CT图像快速三维重建算法

韩民; 成旭; 李登旺

doi:10.11999/JEIT170003

基于小波变换的多分辨率锥束CT图像快速三维重建算法

doi: 10.11999/JEIT170003

1.
(山东大学信息科学与工程学院济南 250100) ②(山东师范大学物理与电子科学学院济南 250014)

基金项目:

国家自然科学基金(61471226)，山东省自然科学杰出青年基金(JQ201516)

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- 被引次数: 0
出版历程
- 收稿日期: 2017-01-03
- 修回日期: 2017-04-05
- 刊出日期: 2017-10-19

Fast 3D Reconstruction Algorithm of Multi-resolution Cone Beam CT Image Based on Wavelet Transform

1.
(Institute of Information Science and Engineering, Shandong University, Jinan 250100, China)
2.
(Institute of Physics and Electronics, Shandong Normal University, Jinan 250014, China)

Funds:

The National Natural Science Foundation of China (61471226), The Distinguished Young Scholars of Shandong Province(JQ201516)

摘要

摘要: 为了解决FDK重建算法在锥束CT重建中运算量大，耗时较多，以及针对不同的应用环境提供不同分辨率的3维医学图像问题，该文提出一种基于小波变换的多分辨率锥束CT图像快速3维重建算法。首先对采集到的投影图像进行相应尺度的小波变换，得到各尺度小波分解系数，选择相应尺度的小波系数进行FDK重建，可以得到相应低分辨率的3维图像数据，还可根据需要由得到的低分辨率重建数据分别沿着径向取断层图像，进行相应的小波逆变换，进而得到高分辨率的3维图像数据。实验数据表明，该方法不仅能够得到不同分辨率的3维图像数据，而且相较于传统的FDK算法生成分辨率相同、精度相近的高分辨率3维图像数据，重建速度可以提高1倍以上。
- 锥束CT /
- FDK重建 /
- 小波变换 /
- 多分辨率
Abstract: To solve the large amount of computation, time-consuming problems of the FDK reconstruction algorithm for cone beam CT reconstruction, and different resolutions for different application environments of 3D medical image, this paper proposes a fast reconstruction algorithm of multi-resolution cone beam CT image based on wavelet transform. Firstly, the corresponding wavelet transform for projection images are obtained, and the corresponding scale wavelet coefficients are selected for FDK reconstruction. Thus, 3D image data of the low resolution are obtained. According to need, the high resolution 3D image data can also be obtained by the inverse wavelet transform of the radial images obtained from low resolution. The experimental data shows that this method can not only provide a different resolution of the 3D image data, but also increase the reconstruction speed more than one times when the same resolution and similar precision high resolution 3D image data is obtained compared with the traditional FDK algorithm.
- Cone beam CT /
- FDK reconstruction /
- Wavelet transform /
- Multi-resolution

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参考文献(26)

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