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Method for detecting image reconstruction algorithm performance by using dynamic thoracic digital simulation model

A technology of digital simulation and model detection, applied in the field of biomedical imaging, which can solve the problems of inability to detect the reconstruction performance of reconstruction algorithms

Inactive Publication Date: 2006-12-13
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The disadvantage of using the FORBILD simulation model to detect the performance of the reconstruction algorithm is that the FORBILD model is static, and this model cannot detect the reconstruction performance of the reconstruction algorithm for dynamic objects (such as the heart)

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  • Method for detecting image reconstruction algorithm performance by using dynamic thoracic digital simulation model
  • Method for detecting image reconstruction algorithm performance by using dynamic thoracic digital simulation model
  • Method for detecting image reconstruction algorithm performance by using dynamic thoracic digital simulation model

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Embodiment Construction

[0036] In order to better understand the technical solution of the present invention, the following will be further described in conjunction with the accompanying drawings and specific embodiments. The detected algorithm in the embodiments is the FDK algorithm, which is suitable for CT with single-source cone beam circular trajectory scanning. The concrete steps of embodiment are as follows:

[0037] 1. Establish a three-dimensional dynamic chest digital model.

[0038] (1) if figure 1 , establish a space Cartesian coordinate system, assume that the digital model is a cuboid structure as a whole, and the lengths of each edge are: the edge length in the X-axis direction is 256 (pixels), the edge length in the Y-axis direction is 256 (pixels), and the edge length in the Z-axis direction is 140 (pixels). pixels).

[0039] Establish the main parts of the model in turn according to the parameters in the following tables:

[0040] Note: All parameters in the table are normalized ...

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Abstract

The related method to detect image reconstruction algorithm by dynamic breast digital simulation model comprises: (1) using ellipsoidal and elliptical cylinder to form 3D dynamic breast model; (2) obtaining simulation projection data; (3) using the target algorithm to reconstruct the image with former data; (4) calculating the reconstruction performance for the algorithm as practical request; (5) changing model parameter, repeating former steps for further detection. This invention can determine the advantage and disadvantage for different algorithms.

Description

technical field [0001] The invention relates to a method in the technical field of biomedical imaging, in particular to a method for detecting the performance of an image reconstruction algorithm with a dynamic chest digital simulation model. Background technique [0002] The performance of image reconstruction algorithms includes: precision, density resolution, spatial resolution, time resolution, sensitivity to noise, degree of artifacts, robustness, etc. When testing the performance of image reconstruction algorithms, human bodies or small animals are directly used for testing. Because the correct value of the density distribution in human bodies or small animals cannot be known in advance, reconstruction values ​​cannot be compared with them, and many performance indicators of reconstruction algorithms cannot be expressed quantitatively. Therefore, the digital model or physical model with a pre-set density distribution is generally used to simulate the projection and the...

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Application Information

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IPC IPC(8): G06T11/00G06T17/00
Inventor 赵俊刘尊钢庄天戈
Owner SHANGHAI JIAO TONG UNIV
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