Detecting method based on coaxial time-domain distinguishing photoacoustic imaging

Abstract

The invention discloses a detecting method based on coaxial time-domain distinguishing photoacoustic imaging. The method includes the steps of system initial positioning, single-point testing, time-domain distinguishing photoacoustic positioning and analyzing, photoacoustic single-point blood vessel measuring and photoacoustic three-dimensional blood vessel reestablishing. The detecting method hasthe advantages that through a coaxial laser emitting and ultrasonic receiving light path, an optical focus and an acoustic focus coincide, same-vortex laser stereoscopic angle exciting and receivingstereoscopic angle receiving are achieved, and measurement errors can be reduced; with blood flow photoacoustic echoes in blood vessels as the space analysis standard, through time-domain distinguishing photoacoustic echo signal analysis, photoacoustic echo signals corresponding to the blood flow, blood vessel inner tissue and blood vessel wall layered substances passing through a main-axis routeat the same time can be analyzed, and photoacoustic detection can be conducted on the outer appearance of the blood vessels and the inner tissue form distribution at the same time.

Description

technical field [0001] The invention relates to a human blood vessel detection method, in particular to a detection method based on coaxial time-domain resolution photoacoustic imaging, which is suitable for detection of three-dimensional structures inside and outside human arteries and veins, and belongs to the field of photoelectric detection. Background technique [0002] Angiography is an auxiliary inspection technique used to monitor the health of blood vessels. It is widely used in the diagnosis and treatment of various clinical diseases. It helps doctors to detect the disease in time, control the progress of the disease, and effectively improve the survival of patients. Rate. Angiography is an interventional detection method. It needs to inject a contrast agent into the blood vessels of the subject. Because X-rays cannot penetrate the contrast agent, angiography can accurately reflect the location and degree of vascular lesions. However, angiography also has many def...

AI Technical Summary

Problems solved by technology

Photoacoustic imaging technology can realize the detection of blood vessel distribution, that is, the detection of external shape, but it is a difficult problem to be solved to detect the external shape of blood vessels and the distribution of internal tissue morphology at the same time.

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