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CT (computerized tomography) on-line reconstruction and real-time visualization method based on CUDA (compute unified device architecture)

A technology of projecting data and data, which is applied in the field of online reconstruction of X-ray CT images, can solve the problems that cannot be used in combination, and achieve the effect of real-time online feedback

Inactive Publication Date: 2013-05-01
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

Only one of CUDA runtime API or CUDA driver API can be used in a program, and cannot be mixed

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  • CT (computerized tomography) on-line reconstruction and real-time visualization method based on CUDA (compute unified device architecture)
  • CT (computerized tomography) on-line reconstruction and real-time visualization method based on CUDA (compute unified device architecture)
  • CT (computerized tomography) on-line reconstruction and real-time visualization method based on CUDA (compute unified device architecture)

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Embodiment Construction

[0039] The basic idea of ​​the present invention is to make the CPU and GPU work cooperatively through the CPU-GPU heterogeneous computing mode, and at the same time of collecting the original projection data, online reconstruction and real-time visualization are carried out according to the collected data, so as to realize the real-time feedback of CT reconstruction. .

[0040] The method of the present invention will be described in detail below with reference to the accompanying drawings. A specific implementation scheme of the present invention and its flow chart are as follows image 3 As shown, it mainly includes three steps: acquisition and preprocessing of projection data, CPU implementation of FDK weighted filtering process, GPU implementation of FDK weighted back projection process, and GPU implementation of volume rendering process. The following are introduced one by one.

[0041] Step 1: Acquisition and Preprocessing of Projection Data

[0042]The acquisition q...

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Abstract

The invention provides a CT (computerized tomography) on-line reconstruction and visualization method based on a CUDA (compute unified device architecture). The method comprises the following steps of obtaining projection data and pre-treating the obtained projection data; realizing FDK (Feldkamp, Davis and Kress) weighted filter process by a CPU (central processing unit); accelerating CUDA to realize FDK weighted back protection; and accelerating CUDA to realize volume rendering. The method provided by the invention can be used for implementing on-line reconstruction for cone beam CT data, so that a cone beam CT system can reconstruct a CT three-dimensional image while sampling the projection data, and an integrated CT image can be obtained finally along with the completion of the projection data, thereby realizing real-time on-line feedback.

Description

technical field [0001] The invention relates to a method for online reconstruction of X-ray CT images, in particular to a method for online reconstruction and real-time visualization of cone beam CT images based on CUDA architecture. Background technique [0002] With the development of hardware, the speed of CT scanning has been improved. In practical applications, the image reconstruction time is longer than the scanning time, which becomes the bottleneck of the application. CT reconstruction is computationally intensive and time-consuming, and the computational complexity is proportional to the product of the volume of reconstructed data and the number of projected views. More and more people pay attention to how to improve the reconstruction speed. For the acceleration of 3D reconstruction, some international scientific research institutions and companies have made fruitful research and development. Acceleration can start from the algorithm itself to reduce the time comp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/08
Inventor 杨鑫田捷李勇保薛贞文
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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