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Reconstruction method of tomographic imaging

A technology of tomography and projection data, applied in 2D image generation, image data processing, instruments, etc., can solve the problems of limiting the practical application of tomography, restricting the reconstruction speed due to the amount of calculation, saving the time of data transmission, The effect of increasing rebuild speed, speeding up

Inactive Publication Date: 2015-11-25
RAYCO SHANGHAI MEDICAL PROD
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Problems solved by technology

However, although the reconstruction effect of tomography is widely recognized, the huge amount of calculation in the reconstruction process restricts the reconstruction speed and limits the practical application of tomography

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  • Reconstruction method of tomographic imaging
  • Reconstruction method of tomographic imaging
  • Reconstruction method of tomographic imaging

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Embodiment Construction

[0013] In order to better understand the spirit of the present invention, it will be further described below in conjunction with some preferred embodiments of the present invention.

[0014] In the current tomographic image reconstruction process, complex data calculations, such as operations involved in filtering, are mainly completed on the central processing unit. Correspondingly, the speed bottleneck of tomographic image reconstruction is also reflected in the computing speed of the central processing unit. Of course, a central processing unit with higher computing power can be selected to increase the reconstruction speed, but this will inevitably lead to a substantial increase in cost.

[0015] Embodiments of the present invention provide another way to solve the above-mentioned problems. Through the complementary cooperation between the central processing unit and the graphics processing unit, and clever use of the characteristics of the open computing language (OpenCL,...

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Abstract

The invention relates to a reconstruction method of tomographic imaging. According to an embodiment of the invention, the reconstruction method of tomographic imaging includes the following steps: projection data are obtained; a graphics processing unit uses an open computing language to filter the projection data; and the graphics processing unit uses the open computing language to perform back projection on the filtered projection data, and performs normalization processing on a volume image reconstructed through the back projection. By coordinating task sharing between a CPU and the GPU, the reconstruction method of tomographic imaging provided by the embodiment of the invention ingeniously utilizes structural features of the open computing language and reduces extra time occupied by data transmission, and thus the speed of reconstruction can be substantially improved. In addition, the reconstruction method of tomographic imaging also improves quality of imaging through processing such as weighting and normalization.

Description

technical field [0001] The present invention relates to a method for reconstructing a tomographic image, in particular to a method for reconstructing a tomographic image using a graphics processing unit (GPU, Graphic Processing Unit). Background technique [0002] Radiographic tomography, such as digital tomography, is an important part of the field of medical imaging. By acquiring multiple two-dimensional projections within a limited angle, radiation tomography can reconstruct a volume image based on these two-dimensional projections, thereby providing three-dimensional image information for image analysis in fields such as medicine or biology. However, although the reconstruction effect of tomography is widely recognized, the huge amount of calculation in the reconstruction process restricts the reconstruction speed and limits the practical application of tomography. [0003] Common tomographic imaging mainly involves two types of high-calculation operations, analytical a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
Inventor 孔明明李冬东赵辉
Owner RAYCO SHANGHAI MEDICAL PROD
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