Photoacoustic imaging device

Abstract

The invention discloses a photoacoustic imaging device which is used for measuring the oxyhemoglobin saturation. The photoacoustic imaging device comprises a laser device, an optical waveguide, a first light split element, a second light split element, a first switch, a second switch, a transmission reflecting mirror, a photodiode, an objective, a water prism, a water groove, an ultrasonic transducer, an amplifier, a data collecting module, a control module and a calculation module. The laser device emits a nanosecond pulse laser of one wavelength and is coupled with the optical waveguide. The optical waveguide has the non-linear optical effect, and the pulse laser has two wavelengths after passing through the optical waveguide. The first light split element divides a laser with the two wavelengths into two lasers with a single wavelength. The first switch and the second switch are used so that only one laser of the photoacoustic imaging device can reach a sampler at any moment, and therefore signals excited by the laser of the two different wavelengths can be obtained. The photoacoustic imaging device is low in manufacturing cost, convenient to operate and reliable.

Description

technical field [0001] The invention relates to the field of photoacoustic imaging, in particular to a photoacoustic imaging device. Background technique [0002] Photoacoustic imaging is a non-destructive medical imaging method developed in recent years. It combines the high contrast characteristics of pure optical imaging and the high penetration depth characteristics of pure ultrasound imaging, and can provide high-resolution and high-contrast tissue imaging. The important thing is that it can realize biological physiological function imaging. For example, photoacoustic imaging technology can be used to measure physiological parameters such as blood oxygen saturation of living organisms. [0003] The basic principle of using photoacoustic imaging technology to measure blood oxygen saturation in living organisms is that oxygenated hemoglobin and deoxygenated hemoglobin have different light absorption coefficients for different wavelengths. Therefore, to measure the blood...

AI Technical Summary

Problems solved by technology

However, this photoacoustic imaging device is not only expensive, but also difficult to realize the alternate control of tunable nanosecond pulsed lasers.

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