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Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing

A technology of compressed sensing and photoacoustic imaging, applied in sensors, acoustic wave diagnosis, infrasonic wave diagnosis, etc., can solve the problems of poor horizontal image resolution, high hardware cost, serious artifacts, etc., and achieve high resolution, simple operation, and reliability good sex effect

Active Publication Date: 2013-03-13
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of serious artifacts, image deformation, high hardware cost and poor lateral resolution of images in the imaging of biological tissues by the existing photoacoustic technology, and provides a single-array multi-angle sensor based on compressed sensing. Observation photoacoustic imaging device and method

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  • Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing
  • Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing
  • Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing

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specific Embodiment approach 1

[0028] Specific implementation mode one: the following combination figure 1 Describe this embodiment. This embodiment is based on a compressed sensing single-array element multi-angle observation photoacoustic imaging device, which includes a pulsed laser 1, a pulsed laser processing device, a servo motor and a driver 5, an optical mask 9, and a single-array element ultrasonic detection device. Device 11, sample pool 12, support 13, computer 14 and signal acquisition circuit 15,

[0029] An optical mask 9 is set directly above the sample pool 12, the output end of the measurement matrix of the signal acquisition circuit 15 is connected to the input end of the optical mask 9, the beam control end of the signal acquisition circuit 15 is connected to the control end of the pulsed laser 1, and the pulse The pulsed laser light emitted by the laser 1 is processed by the pulsed laser processing device, then emitted to the surface of the optical mask 9, and irradiated in the sample ce...

specific Embodiment approach 2

[0044] Specific implementation mode two: the following combination Figure 2 to Figure 7 To illustrate this embodiment, based on the method of compressive sensing-based multi-angle observation photoacoustic imaging device described in the first embodiment, the method includes the following steps:

[0045] Step 1. Place the biological tissue 10 to be tested in the center of the sample pool 12. The FPGA built in the main control circuit 156 emits a pulse signal to trigger the pulsed laser 1. At the same time, the optical mask 9 is controlled to generate a random matrix, and the pulsed laser 1 generates laser pulses. , after the laser pulse is processed by the pulse laser processing device, it is irradiated onto the biological tissue 10 to be measured through the optical mask 9 to generate a photoacoustic signal;

[0046] Step 2, the servo motor and the driver 5 adjust the observation angles of the two single-array element ultrasonic probes 11 through the sleeve 4 and the bracket...

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Abstract

The invention relates to a method and device for observing photoacoustic imaging in a single-array element and multi-angle mode based on compressive sensing, belonging to the technical field of photoacoustic imaging and aiming at solving the problems of serious artefact, deformed images, high hardware cost and poor lateral resolution of images in the existing photoacoustic technology for imaging biological tissues. The method comprises the following steps: leading a pulsed laser to emit pulsed laser beams, irradiating the pulsed laser beams upon the biological tissues by using an optical mask to generate photoacoustic signals, observing and acquiring the photoacoustic signals synchronously by using two angled single array element ultrasonic probes, amplifying the photoacoustic signals, sending the photoacoustic signals to an A / D (analog to digital) converter, sampling uniformly, inputting acquired photoacoustic image data into a computer by using an FPGA (field programmable gate array), and reconstructing and fusing photoacoustic images by using the computer. Due to the adoption of a hardware platform and a processing mechanism which is rapidly constructed based on the compressive sensing algorithm by using the single array element ultrasonic probes to acquire the photoacoustic signals in parallel, the high resolution of the images are ensured on the premise that the sampled data are reduced and the acquiring time is shortened. The device for imaging is easy to operate.

Description

technical field [0001] The invention relates to a single array element multi-angle observation photoacoustic imaging device and method based on compressed sensing, and belongs to the technical field of photoacoustic imaging. Background technique [0002] As an emerging medical imaging technology, photoacoustic imaging organically combines the characteristics of optical imaging and acoustic imaging, and can provide high-resolution and high-contrast tissue tomographic images of deep tissues. It has a large amount of information and can provide rich optical absorption and scattering information other than morphological information. It is a promising medical detection method. [0003] In recent years, great progress has been made in the application of photoacoustic technology to the imaging of biological tissues, and the quality of photoacoustic imaging devices is closely related to the device cost, imaging quality and imaging time. The cost of the device is mainly related to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00A61B5/00
Inventor 冯乃章孙明健沈毅马立勇李建刚伍政华
Owner HARBIN INST OF TECH
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