An Endoscopic Probe for Intravascular Photoacoustic/Ultrasound Imaging with Efficient Collimated Light Excitation

Abstract

The invention discloses an intravascular photoacoustic / ultrasonic imaging endoscopy probe of efficient collimation optical excitation. The endoscopy probe comprises a C-Lens, a concave reflecting mirror, an ultrasonic transducer, optical fiber, a probe case and a torque coil; the C-Lens is used for collimating a pulse laser transmitted by the optical fiber. The concave reflecting mirror is used for optimizing the collimated pulse laser and reflecting the collimated pulse laser to a sample to excite an ultrasonic signal. The ultrasonic signal is converted into an electrical signal through the ultrasonic transducer and transmitted to an acquisition system through a coaxial line. The ultrasonic transducer can also independently complete ultrasonic imaging by sending or receiving. According to the intravascular photoacoustic / ultrasonic imaging endoscopy probe of the efficient collimation optical excitation, the C-Lens and the concave reflecting mirror are in use cooperatively, therefore, the pulse laser can be effectively collimated, so that the problem is addressed that lasers focus on one point, the probe deviates from the vascular center, and accordingly image distortion exists and the vascular endoscopy imaging quality is improved.

Description

Technical field [0001] The present invention relates to the field of vascular endoscons, and Background technique [0002] Entering the 21st century, cardiovascular and cerebrovascular diseases become the number one killer affecting human health, and the rupture of atherosclerotic plaques is the main cause of acute cardiovascular vascular events, although there is now magnetic resonance imaging, angiography, intravascular imaging Ultrasonic imaging, these similar imaging methods can better present external morphology or internal contours of the blood vessel, but unable to provide local detail information of the vascular wall. Invasive optical sound imaging is a non-invasive and non-ionized new biomedical imaging method developed in recent years, and the advantages of pure photonic imaging and pure ultrasound imaging have both high comparisibility of pure optical imaging. The advantages of high penetration of acoustic imaging. By combined with intravascular photonic imaging and in...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a highly efficient collimated light-excited intravascular photoacoustic / ultrasound imaging endoscopic probe, which fully utilizes the characteristics of C-Lens and concave mirrors, and is highly efficient. The collimated pulsed laser improves the utilization rate of the laser and the luminous flux density incident on the surface of the tissue, solves the problem that the probe deviates from the center of the blood vessel due to the concentration of the laser at one point and causes image distortion, and improves the quality of endoscopic imaging

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