Endoscopic imaging probe and imaging method with same

Abstract

The invention provides an endoscopic imaging probe. The endoscopic imaging probe comprises an optical module, an ultrasonic module and a probe protective shell, wherein the ultrasonic module comprises an ultrasonic reflecting module and an ultrasonic detector; the protective shell is provided with an imaging window; the ultrasonic reflecting module comprises an ultrasonic reflecting surface corresponding to the imaging window in position and is arranged on the optical path of optical imaging light beams and / or optoacoustic exciting light beams, so that the optical imaging light beams and / or the optoacoustic exciting light beams can be emitted out in a direction coaxial to the ultrasonic wave beams reflected through the ultrasonic reflecting surface after penetrating the ultrasonic reflecting module. Besides, the invention also provides an endoscopic imaging method with the endoscopic imaging probe. Therefore, single-mode or multi-mode imaging of the same position point through optoacoustic imaging, optical imaging and ultrasonic imaging can be achieved, the imaging accuracy of every mode can be improved, the detecting efficiency of entire one-dimensional optoacoustic signals can be improved, and the diameter of the probe and the probe machining difficulty can be reduced as much as possible.

Description

technical field [0001] The invention relates to biomedical imaging technology, in particular to an endoscopic imaging probe and an imaging method using the imaging probe. Background technique [0002] Endoscopic imaging, as a non-invasive imaging method, can effectively extend the human line of sight, and is widely used in image diagnosis and image-guided therapy in many fields such as the digestive tract, cardiovascular and cerebrovascular systems, urinary system, and respiratory tract, which greatly promotes the development of diseases. inspection accuracy. [0003] In recent years, multi-modal endoscopic imaging technologies have developed rapidly, such as ultrasound, OCT (optical coherence tomography) dual-mode endoscopic imaging technologies, and new photoacoustic endoscopic imaging technologies. Among them, ultrasound and OCT dual-mode endoscopic imaging technology can more accurately reflect the characteristics of biological tissues by combining the ultra-large imagi...

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Problems solved by technology

[0005] However, in the prior art, U.S. Patent US20120271170 mentions that the optical fiber and the ultrasonic transducer are placed side by side so that the light beam overlaps with the ultrasonic receiving range to realize the reception of the photoacoustic signal; however, since the ultrasonic transducer itself has a certain size of emission and receiving aperture, this design leads to the photoacoustic signal excited outside the overlapping area cannot be detected or the detection efficiency is extremely low

However, US20080177183 mentions that the optical fiber is placed in a hollow transducer to realize that the laser excitation area overlaps with the ultrasonic receiving area, so that the ultrasonic detection of the entire excitation range can be realized; however, since the ultrasonic transducer is a piezoelectric material , it is difficult to process micro-holes in the middle of the transducer due to material characteristics

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