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Electromagnetic wave thermally induced ultrasonic imaging excitation source and imaging device formed by same

An ultrasonic and electromagnetic wave technology, applied in the target imaging field, can solve the problems of high microwave source design requirements, complex product structure and high cost, and achieve the effects of simple structure, low cost and high safety

Active Publication Date: 2015-09-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, microwave thermal ultrasonic imaging technology must use high-power microwave sources with a power level of kilowatts as excitation, which requires high design requirements for microwave sources, resulting in complex product structures and high costs.

Method used

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  • Electromagnetic wave thermally induced ultrasonic imaging excitation source and imaging device formed by same
  • Electromagnetic wave thermally induced ultrasonic imaging excitation source and imaging device formed by same
  • Electromagnetic wave thermally induced ultrasonic imaging excitation source and imaging device formed by same

Examples

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Embodiment 1

[0032]In this example, the excitation source for electromagnetic wave thermoinduced ultrasonic imaging includes a radiation source and a transmitting system. In this example, the radiation source includes a first radiation source and a second radiation source, and the transmitting system is composed of a horn antenna and a mixer, such as figure 1 shown. Both the first radiation source and the second radiation source are commercial magnetrons, and work in the microwave open frequency band of 2.400-2.500 GHz. The operating frequency of the first radiation source is 2.4505 GHz, and the operating frequency of the second radiation source is 2.4495 GHz, with a difference of 1 MHz and a power of 20 dBm. The electromagnetic wave signals emitted by the first radiation source and the second radiation source are synthesized by a mixer and input to the horn antenna, and the electromagnetic wave signal is transmitted to the target to excite the target to generate a thermal ultrasonic sign...

Embodiment 2

[0038] This example is an electromagnetic thermal ultrasonic imaging device for breast cancer detection in the medical field, including an excitation source, an ultrasonic detection device and a signal processing system. like Figure 5 As shown, the excitation source in this example includes a first radiation source, a second radiation source and an emission system. The frequency of the electromagnetic wave signal emitted by the first radiation source is 1.2010GHz, and the frequency of the electromagnetic wave signal emitted by the second radiation source is 1.1990GHz, which is very close to the heat-sensitive frequency of 1.2000GHz of human breast tissue, and the frequency of the electromagnetic wave signal emitted by the first radiation source is 1MHz higher than the heat-sensitive frequency of human breast tissue, the electromagnetic wave signal frequency emitted by the second radiation source is lower than 1MHz of heat-sensitive frequency of human breast tissue, and the he...

Embodiment 3

[0040] Image 6 The structure of the excitation source in this example is shown, including the first radiation source, the second radiation source and the transmitting system composed of the first antenna and the second antenna. The electromagnetic wave emitted by the first radiation source is emitted to the target through the first antenna, and the electromagnetic wave emitted by the second radiation source is emitted to the target through the second antenna. The radiation source of this structure adopts a directional antenna, and the two radiation sources can irradiate the target from different directions at the same time, which is conducive to improving the accuracy of imaging detection and can be adapted to some special occasions.

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Abstract

The invention relates to a target imaging technology and discloses an imaging device using a double frequency radiation source as an electromagnetic wave excitation source to reduce the dependency degree to a high-power radiation source of thermally induced ultrasonic imaging. According to the technical scheme, the electromagnetic wave thermally induced ultrasonic imaging excitation source comprises radiation sources and an emitting system, wherein the radiation sources emit electromagnetic wave signals through the emitting system, an excitation target produces a thermally induced ultrasonic signal, the radiation sources include a first radiation source and a second radiation source, and the electromagnetic wave signals emitted by the first radiation source and the second radiation source are unequal in frequency. The invention further provides an electromagnetic wave thermally induced ultrasonic imaging detection device which comprises the excitation source, an ultrasonic wave detection device and a signal processing system. The imaging excitation source uses the electromagnetic wave signals different in frequency two radiation sources as an excitation medium, can use the excitation source with lower emitting power and has the advantages of being high in safety, simpler in structure and lower in cost.

Description

technical field [0001] The invention relates to target imaging technology, in particular to an excitation source for electromagnetic wave thermoinduced ultrasonic imaging and detection equipment formed therefrom. Background technique [0002] In target imaging technology, microwave imaging is an imaging method that uses microwave as an information carrier. Its information includes both the amplitude information scattered by the target and the phase information, so it is also called microwave holographic imaging. The application of microwave imaging in the medical field is based on the obvious difference in electrical characteristic parameters between biological diseased tissue and normal tissue. Microwave imaging can provide high-contrast images of biological tissues. For biological tissue, the magnetic permeability is the same, but the permittivity and electrical conductivity are determined by the water content, fat and protein content of the biological tissue. The diele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08
CPCA61B8/085A61B8/44
Inventor 刘长军
Owner SICHUAN UNIV
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