EM tomographic image reconstruction using polar voxels

被引：8

作者：

Soriano, A. ^{[1
]}

Rodriguez-Alvarez, M. J. ^{[1
]}

Iborra, A. ^{[2
]}

Sanchez, F. ^{[1
]}

Carles, M. ^{[1
]}

Conde, P. ^{[1
]}

Gonzalez, A. J. ^{[1
]}

Hernandez, L. ^{[1
]}

Moliner, L. ^{[1
]}

Orero, A. ^{[1
]}

Vidal, L. F. ^{[1
]}

Benlloch, J. M. ^{[1
]}

机构：

[1] Ctr Mixto CSIC UPV CIEMAT, Inst Instrumentac Imagen Mol I3M, E-46022 Valencia, Spain

[2] Univ Politecn Valencia, Inst Matemat Multidisciplinar, E-46022 Valencia, Spain

来源：

JOURNAL OF INSTRUMENTATION | 2013年 / 8卷

关键词：

Image reconstruction in medical imaging; Data reduction methods; CT;

D O I：

10.1088/1748-0221/8/01/C01004

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The splitting of the field of view (FOV) in polar voxels is proposed in this work in order to obtain an efficient description of a cone-beam computed tomography (CT) scanner. The proposed symmetric-polar pixelation makes it possible to deal with the 3D iterative reconstruction considering a number of projections and voxel sizes typical in CT preclinical imaging. The performance comparison, between the filtered backprojection (FBP) and 3D maximum likelihood expectation maximization (MLEM) reconstruction algorithm for CT, is presented. It is feasible to achieve the hardware spatial resolution limit with the considered pixelation. The image quality achieved with MLEM and FBP have been analyzed. The results obtained with both algorithms in clinical images have been compared too. Although the polar-symmetric pixelation is presented in the context of CT imaging, it can be applied to any other tomographic technique as long as the scan comprises the measurement of an object under several projection angles.

引用

页数：7

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