Handheld photoacoustic imaging device and method

Abstract

The invention discloses a handheld photoacoustic imaging device and method. The device comprises a light source driving circuit, a light source array, an optical shaping system, an ultrasonic detection array, a signal amplification circuit, a signal acquisition circuit, a microprocessor ARM unit, an image display circuit, a wireless transmission circuit, a synchronous trigger circuit and a power supply. The method comprises the following steps: a photoacoustic signal is excited by the light source array and is received and converted into an analog electric signal by the ultrasonic detection array; the analog electric signal is amplified by the signal amplification circuit and converted into a digital signal by the signal acquisition circuit and stored; and the microprocessor ARM unit carries out signal processing of data, image reconstruction and real-time display of control images. According to the device, an LED / LD is adopted as an excitation light source, photoacoustic signals collected by the ultrasonic detection array are stored, processed and reconstructed at the imaging device end to achieve palm real-time display imaging; and imaging data can also be transmitted to a computer in a wireless transmission mode and displayed at a computer end.

Description

technical field [0001] The invention relates to the field of photoacoustic imaging technology and devices, in particular to a handheld photoacoustic imaging device and method. Background technique [0002] Photoacoustic imaging technology is a new type of non-invasive and non-ionizing biological imaging technology that has developed rapidly in recent years and has received widespread attention. Photoacoustic imaging combines the advantages of optical imaging and ultrasonic imaging, that is, the non-invasive and highly selective excitation characteristics of optical imaging and the low attenuation and high penetration characteristics of ultrasonic imaging. The theoretical basis of photoacoustic imaging is the photoacoustic effect. When short-pulse light irradiates biological tissue, the absorber in the tissue absorbs the light energy, which heats up and expands to generate thermoelastic waves. The energy is emitted in the form of ultrasonic waves. The ultrasonic signal gener...

AI Technical Summary

Problems solved by technology

However, the signal transmission of the above-mentioned invention patents is transmitted from the head ultrasound transducer through the signal line and stored on the (external) computer. This kind of photoacoustic imaging system with a wired connection and a computer or an oscilloscope is still bulky. It is not conducive to portability, and the connection of the signal line makes it difficult to adjust the detection angle and real-time operation during imaging

Images