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A Photoacoustic Image Optimization Method Using Deconvolution Operation

A technology of photoacoustic image and optimization method, applied in image detector method and image signal processing, image enhancement, image analysis, etc. Problems such as artifacts

Active Publication Date: 2021-11-16
NANJING UNIV +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the low signal-to-noise ratio of the photoacoustic signal, the reconstructed photoacoustic image is prone to artifacts, so this technology cannot be widely used at present.

Method used

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  • A Photoacoustic Image Optimization Method Using Deconvolution Operation
  • A Photoacoustic Image Optimization Method Using Deconvolution Operation
  • A Photoacoustic Image Optimization Method Using Deconvolution Operation

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Embodiment Construction

[0042] Such as figure 1 As shown, the present invention provides an image optimization method that can improve image quality and ensure reconstruction speed and efficiency without loss of information, including the following steps:

[0043] Step 1: Use the photoacoustic data acquisition equipment shown in Figure 2 below to regard the extremely thin object as an ideal point source, irradiate the point source with a pulsed laser, and use an array sensor to receive the sound pressure signal p at the same time d (r 0 , t), where r 0 is the sensor coordinate vector parameter, t is the time parameter;

[0044] Step 2, the group of signals includes N channel data. Under normal circumstances, ignoring the delay difference, the waveform of each channel data can be regarded as consistent, so the useful signal segment of any channel is intercepted, and the signal segment can be regarded as The thermal expansion characteristics of biological tissue and the total system response of this...

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Abstract

The invention discloses a photoacoustic image optimization method using deconvolution operation, which comprises the following steps: firstly obtain a deconvolution kernel by collecting a photoacoustic signal of a point source; collect a signal to be processed; estimate the signal of the signal to be processed Noise ratio; use the Wiener deconvolution method to deconvolute the signal to be processed; use the signal after deconvolution as input for image reconstruction, and obtain the final optimized image after grayscale nonlinear transformation processing. The present invention optimizes the problems of low photoacoustic imaging resolution and serious artifacts, eliminates the signal deformation caused by the balance characteristics of thermal expansion of biological tissues and the influence of the acquisition system through deconvolution operation, and optimizes the imaging quality. At the same time, the reconstruction speed and efficiency can also be guaranteed.

Description

technical field [0001] The invention belongs to the field of photoacoustic signal processing and imaging, in particular to an optimization method for photoacoustic imaging. Background technique [0002] In recent years, photoacoustic imaging is an emerging imaging technology with broad application prospects, and related research has become increasingly extensive and in-depth. This is because photoacoustic imaging combines the advantages of pure optical imaging and ultrasound imaging, and can achieve high contrast and spatial resolution while ensuring a certain imaging depth. At the same time, compared with the current mainstream ultrasound imaging, the cost of photoacoustic imaging equipment is lower, and it has a very high application value. However, due to the low signal-to-noise ratio of the photoacoustic signal, the reconstructed photoacoustic image is prone to artifacts, so this technology cannot currently be widely used. At the same time, improving the image resoluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/20G01N21/17
CPCG06T5/20G01N21/17G01N21/1702G01N2021/1765G06T2207/10132G06T5/00
Inventor 袁杰郭成雯朱昀浩刘晓峻程茜王学鼎
Owner NANJING UNIV
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