Photoacoustic imaging method and system for mammary gland

Abstract

The invention discloses a photoacoustic imaging method and system for a mammary gland. The method comprises the following steps of collecting a photoacoustic signal generated after a mammary gland tissue is irradiated by a laser; preprocessing the photoacoustic signal and converting the photoacoustic signal into a digital signal; denoising the digital signal obtained after preprocessing, reconstructing optical coefficient absorption distribution of the mammary gland tissue, conducting medical imaging on the mammary gland tissue, and obtaining a mammary gland photoacoustic image; extracting a region of interest of the mammary gland photoacoustic image; and according to the region of interest of the mammary gland photoacoustic image, positioning a mammary gland lesion point. According to the photoacoustic signal acquisition method and system, the optical coefficient absorption distribution of the mammary tissue is reconstructed by adopting a phase-controlled focusing algorithm, the mammary tissue is subjected to medical imaging, the photoacoustic image can be reconstructed by acquiring the photoacoustic signals in one direction through a detector, rotation around the biological tissue is not needed, the signal acquisition process is fast, the purpose of real-time imaging is achieved, and no vibration error is introduced.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to a photoacoustic imaging method and system for mammary glands. Background technique [0002] Medical imaging of the internal structure of biological tissue is an important means of research and analysis of biological tissue. Among them, photoacoustic imaging is a non-destructive medical imaging method developed in recent years. It has the advantages of both optical and ultrasonic imaging. By introducing pulsed laser light into biological tissue, the tissue will generate ultrasonic signals due to instantaneous thermal expansion, and the tissue can be obtained by detecting the ultrasonic signal. The light absorption information, and then reflect the biological tissue information. It has a wide range of applications. For example, breast imaging based on photoacoustic imaging can study the pathogenesis of breast cancer based on the imaging of breast tissue. [0003] In the p...

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Problems solved by technology

[0007] The object of the present invention is to provide a photoacoustic imaging method and system for mammary glands to solve the problem that the prior art photoacoustic imaging method needs more time to collect photoacoustic signals due to the limitation of mechanical rotation, and the imaging speed is slow. At the same time, mechanical vibration will introduce vibration errors to photoacoustic images, which will bring instability to photoacoustic imaging.

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