A three-dimensional photoacoustic microscopy imaging method and imaging system with multi-port parallel processing
A parallel processing, photoacoustic microscopy technology, applied in the use of tomography for diagnosis, medical science, diagnosis, etc., can solve the problems of consuming CPU resources, reducing the imaging speed of the photoacoustic system, and being unsuitable, and achieving the effect of reducing costs
Active Publication Date: 2022-06-24
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology
The CPU is usually used for calculation, and the serial processing method of the CPU will greatly consume CPU resources, occupy other tasks of the system, and reduce the imaging speed of the photoacoustic system
Since the scanned data is mostly floating-point data, it is not suitable to use hardware processors to improve the system
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[0052] like figure 1 Shown is a flow chart of a three-dimensional photoacoustic microscopy imaging method with multi-port parallel processing in one embodiment. The multi-port parallel processing 3D photoacoustic microscopy imaging method includes:
[0053] In the step of reading data, the data signal collected by the data acquisition card enters the CPU through the PCIE port, and the sampling data f read by the acquisition card n (x,y) is stored in computer memory as f n (x,y) allocates memory, and the memory space size is n*x*y; where f n (x, y) represents the photoacoustic signal with depth y collected for the nth time at the x position. The memory space on the GPU side is f n (x, y) allocate the corresponding two-dimensional thread number, allocate the memory space size as n*x*y, set f n (x,y) is copied from host-side memory to GPU-side video memory.
[0054] Data filtering processing steps, such as Figure 4 As shown, in the GPU, the data matrix is divided by set...
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The invention discloses a multi-port parallel processing three-dimensional photoacoustic microscopic imaging method and imaging system. The method includes: a data acquisition card collects photoacoustic signal data, and through a computer PCIE bus port, the collected data is controlled by a CPU and transmitted to multiple a GPU port; carry out median filter processing in the GPU respectively, control the number of times of filtering through input parameters, and perform wavelet transform processing on the filtered data to obtain new two-dimensional scanning data; pass the new scanning data into the CPU, Combining with GPU to perform deconvolution processing on the new scan data, the obtained data is transferred to GPU; after linear interpolation processing, the data is copied from GPU memory to CPU storage for 3D depth imaging processing, and displayed by the image display. The imaging method and imaging system proposed by the present invention greatly improve the calculation speed of photoacoustic signal data processing and imaging, can significantly accelerate the speed of existing clinical two-dimensional real-time imaging, and increase three-dimensional depth imaging.
Description
technical field [0001] The invention relates to the field of microscopic skin image processing, in particular to a three-dimensional photoacoustic microscopic imaging method and imaging system based on multi-port parallel processing. Background technique [0002] Photoacoustic imaging technology (Photoacoustic Imaging) is a new type of non-destructive medical imaging technology. It uses short-pulse laser to irradiate a light-absorbing medium. After the light-absorbing medium absorbs light energy, the temperature rises rapidly, and the medium expands to generate mechanical waves. Much smaller than the heat conduction time inside the medium, an ultrasonic signal is generated, which is called a photoacoustic signal. Photoacoustic imaging technology has the advantages of high resolution, high contrast, high penetration depth, non-destructive real-time imaging and so on, and has been rapidly developed in recent years. Photoacoustic imaging technology uses ultrasonic transducers ...
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IPC IPC(8): A61B5/00
CPCA61B5/00A61B5/0073A61B5/0095
Inventor 杨思华杨斐马海钢邢达
Owner SOUTH CHINA NORMAL UNIVERSITY