Acousto-optic co-rotatably scanning acousto-optic endoscope device for rectum and imaging method using device
A technology of rotary scanning and endoscopy, applied in the field of endoscopy, can solve the problems of low receiving efficiency of a single array element, low resolution of photoacoustic images, complex structure of the acquisition system, etc., to achieve easy promotion and application, laser The effect of low energy and high image resolution
Active Publication Date: 2014-03-19
广州佰奥廷电子科技有限公司
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Problems solved by technology
The shortcomings of this technology are: the pulse laser used is not focused, and the laser energy required is large; the resolution of the photoacoustic image obtained by reflecting through the conical mirror and exciting the inside of the entire blood vessel is not high; in addition, the device’s The ultrasonic transducer uses 64 ultrasonic array elements, the receiving efficiency of a single array element is not high, and the structure of the acquisition system is complicated due to the large number of array elements
In addition, another existing technology "Focused Rotary Scanning Photoacoustic Ultrasonic Endoscopic Imaging Device and Its Imaging Method", in which the ultrasonic transducer adopts a flat-field design, and the scanning process is realized by rotating the entire probe through an external drive. The mechanical vibration of the middle probe and the eccentricity of the probe will degrade the imaging quality
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[0048] The present invention will be further described below in conjunction with drawings and embodiments.
[0049] Such as figure 1 The shown rectal photoacoustic endoscope device with acoustic and optical co-rotation scanning and its imaging method, including a cannula, a photoacoustic signal excitation component, an ultrasonic signal acquisition component, a detection scanning component, and an image reconstruction and display component;
[0050] The photoacoustic signal excitation component includes a high repetition rate pulse laser, a single-mode fiber, a fiber collimator 6 and an achromatic focusing lens 5;
[0051] The ultrasonic signal acquisition component includes a hollow focused ultrasonic transducer 1 and an ultrasonic coupling medium;
[0052] The detection and scanning assembly includes a coating acoustic / optical high reflector 2, a micro stepper motor 3 and an imaging window 4;
[0053] The image reconstruction and display components include a data acquisiti...
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The invention discloses an acousto-optic co-rotatably scanning acousto-optic endoscope device for rectum and an imaging method using the device. The acousto-optic co-rotatably scanning acousto-optic endoscope device for rectum comprises a sleeve, a single mode fiber, a fiber collimation coupler, a hollow focused ultrasound transducer, an imaging window, a film-coating acousto-optic high reflective mirror and a micro stepping motor, wherein the diameter of the acousto-optic endoscope for rectum is just 12 mm. According to the invention, optical excitation and sound reception adopt a confocal mode, and the film-coating acousto-optic high reflective mirror is driven by the micro stepping motor preposed inside to realize co-rotation and scanning of acousto-optic focuses so as to avoid the problem of mechanical dither and eccentric probe due to scanning by the whole probe when common endoscope is externally driven to rotate. The device can quickly and stably obtain computer tomography of intracavity of the rectum with high sensitivity and high resolution.
Description
technical field [0001] The invention belongs to the technical field of endoscopes, and in particular relates to a rectal photoacoustic endoscope device and an imaging method for co-rotating scanning of sound and light. Background technique [0002] Photoacoustic imaging technology is based on the detection of photoacoustic signals generated by tissue absorption of pulsed lasers, which reflects the difference in optical absorption within the tissue. It combines the advantages of high contrast characteristics of pure optical imaging and high penetration depth characteristics of pure ultrasound imaging. The technology has now been applied to the field of endoscopic imaging. [0003] The prior art "An Intravascular Photoacoustic Ultrasound Imaging Endoscopic Device and Its Imaging Method" discloses an intravascular photoacoustic ultrasonic imaging endoscopic device and an imaging method. The shortcomings of this technology are: the pulse laser used is not focused, and the laser...
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IPC IPC(8): A61B8/12
Inventor 杨思华刘宁邢达
Owner 广州佰奥廷电子科技有限公司
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