Ultrasonic imaging method and system based on multi-frequency time reversal technology
An ultrasonic imaging system and ultrasonic imaging method technology, applied in ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, sonic diagnosis, etc. Increase the vertical resolution, the effect of vertical resolution improvement
Active Publication Date: 2018-03-16
NAT UNIV OF DEFENSE TECH
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[0006] The present invention provides an ultrasonic imaging method and system based on multi-frequency time-reversal technology to solve the technical problem that the existing center-frequency time-reversal multi-signal classification method cannot improve the longitudinal resolution of the ultrasonic imaging system
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[0067] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0068] refer to figure 1 , the preferred embodiment of the present invention provides an ultrasonic imaging method based on multi-frequency time reversal technology, which is applied in an ultrasonic imaging system, such as figure 2 As shown, the ultrasonic imaging system includes a test block 10, an ultrasonic phased array probe 20 arranged on the surface of the test block 10 symmetrically with the vertical axis of the test block 10 as a symmetrical axis, and an ultrasonic phased array probe 20 that is arranged in the lateral direction and is symmetrical with the test block 10. Electrically connected to the array controller 30 for controlling the ultrasonic phased array probe 20 to excite th...
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The invention discloses an ultrasonic imaging method and system based on the multi-frequency time reversal technology. The method comprises the steps of obtaining ultrasonic array data and preprocessing the obtained ultrasonic array data; by means of a center frequency time reversal multi-signal classification method, processing the preprocessed ultrasonic array data, and obtaining an original ultrasonic image; adopting coordinates of a peak point of the obtained original ultrasonic image as input, and calculating a phase compensation factor; according to the calculated phase compensation factor, utilizing the multi-frequency time reversal multi-signal classification method for processing the preprocessed ultrasonic array data to obtain a final ultrasonic image, wherein an imaging result of two through holes is two slender regions distributed in the transverse direction, and the length of the longitudinal direction is close to zero, so that the longitudinal resolution of the ultrasonicimaging system is improved. According to the ultrasonic imaging method and system based on the multi-frequency time reversal technology, the longitudinal resolution, the imaging target reduction rateand the ultrasonic image quality of the ultrasonic imaging system are improved.
Description
technical field [0001] The present invention relates to the field of ultrasonic imaging, in particular to an ultrasonic imaging method and system based on multi-frequency time reversal technology. Background technique [0002] Ultrasonic imaging is the use of ultrasonic waves to acquire, record and reproduce certain characteristics of the imaged target. Due to its advantages of no radiation, no trauma to the test object, easy portability and visualization of results, it has received widespread attention in the field of industrial nondestructive testing. It mainly realizes the detection and evaluation of macroscopic defects inside solid materials or structures. According to the propagation theory of ultrasonic waves, when ultrasonic waves propagate in a solid medium, due to the diffraction of sound waves, the resolution of images obtained by ultrasonic imaging obeys the Rayleigh criterion, that is, for a given ultrasonic imaging system, the ultrasonic images obtained by it ha...
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IPC IPC(8): A61B8/00
CPCA61B8/48A61B8/5207A61B8/5215
Inventor 樊程广赵勇杨磊宋新陈勇刘贤锋
Owner NAT UNIV OF DEFENSE TECH