Pulse type optical acoustic scanning soft-tissue imaging method and device
An imaging method and soft tissue technology, applied in sonic diagnosis, infrasonic diagnosis, ultrasonic/sonic/infrasonic diagnosis, etc., can solve the problems of complicated image scanning methods and long image acquisition time, and achieve wide frequency spectrum, good longitudinal resolution and signal-to-noise than the effect
Inactive Publication Date: 2009-01-07
FUJIAN NORMAL UNIV
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[0003] The purpose of the present invention is to overcome the deficiencies of various existing methods, such as: the scanning method for obtaining images is complicated, and the image taking time is long, etc., to provide a pulsed photoacoustic scanning tomography that can be used to judge the functional structure of larger soft tissues. Imaging method and device
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[0018] In order to have a further understanding of the present invention, a detailed description will now be made in conjunction with the accompanying drawings and embodiments.
[0019] The short-pulse laser 1 emits a short-pulse laser that is expanded and homogenized by the optical system and irradiated on the sample 8 to be tested; the ultrasonic signal generated by the absorber in the sample to be tested under the excitation of the light pulse energy is immersed in the water body 6 The focused transducer 7 detects; the electric signal output by the ultrasonic focused transducer 7 enters the digital oscilloscope 5 after being amplified and filtered by the amplifier arranged in the ultrasonic pulse receiver 4; after the computer 3 completes the signal detection on a position, the computer 3. The scanning system can be driven to complete the two-dimensional scanning of the focusing transducer 7, so that the collection of three-dimensional light energy absorption distribution da...
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The invention relates to an opto-acoustic scanning imaging method and apparatus, which can be used for functional imaging of massive soft tissue, pertains to a new interdiscipline, that is biomedicine optics, and relates to fields of optics, acoustics electronic information, computer technology and medical science etc. The opto-acoustic scanning imaging apparatus comprises a short pulse laser, an ultrasonic focusing energy converter, a digital oscilloscope, a scanning system, an ultrasonic impulse receiving instrument and a computer; the short pulse laser emitted from the laser, after beam expansion, irradiates a sample to be tested to form opto-acoustic signal containing position, absorption degree information and correlating with time, the opto-acoustic signal is received by the ultrasonic focusing energy converter, amplified by the impulse receiving instrument and fed into the computer, one-dimensional longitudinal structure information can be obtained after direct processing, then a two-dimension scanning system driven by the computer drives the ultrasonic focusing energy converter to execute transversal scanning to finish acquisition of three-dimensional absorption distribution data of the sample, accordingly accurate imaging of absorption body position, size and optical energy absorption condition of massive soft tissue can be quickly realized.
Description
technical field [0001] The invention relates to a photoacoustic scanning imaging method and device, which can be used for functional imaging of large soft tissues, such as: women's breasts, neonatal brains, etc. fields of information, computer technology and medicine Background technique [0002] Breast cancer is a major chronic disease that threatens women's health worldwide. Early diagnosis can greatly improve the survival chance of patients, so the development of breast imaging technology with early detection ability will help the diagnosis and treatment of breast cancer. In addition, how to objectively evaluate changes in neonatal cerebral oxygenation, hemodynamics, and brain responses, so as to detect and treat cerebral hypoxia in time, has become an urgent clinical problem to be solved. All of these require the development of new methods and devices for soft tissue functional imaging. Photoacoustic imaging is considered to be a promising new technique for soft tissu...
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IPC IPC(8): A61B8/00A61B19/00A61B5/00
Inventor 李晖徐晓辉吴怡蔡坚勇朱莉莉谢树森
Owner FUJIAN NORMAL UNIV