Radio frequency excitation response measurement device and transfer function measurement system
A measuring device and radio frequency excitation technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems such as radio frequency heating evaluation of difficult implants, and achieve accurate radio frequency heating effects
Pending Publication Date: 2020-01-07
TSINGHUA UNIV
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Problems solved by technology
[0003] Due to the complex environment coupling between the implant and the human body, it is difficult to directly simulate and calculate the radio frequency heating of the implant, making it difficult to accurately evaluate the radio frequency heating of the implant
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[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] As background technology, it is difficult to perform simulation calculations for radio frequency heating of linear conductors in some application scenarios, for example, implanted medical devices, due to the complex environment coupling between implants and human body Radio frequency heating, the inventor found through research that the transfer function of the implant can be used to decouple the implant and the human body model, and the complex environment coupling between the implant and the human body...
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The invention discloses a radio frequency excitation response measurement device and a transfer function measurement system, which are suitable for a linear configuration test piece, wherein the measurement device comprises: a base for fixedly mounting the test piece; an excitation input portion, fixedly installed on the base and electrically connected with the test piece; a moving portion installed on the base and capable of moving along the length direction of the test piece, wherein a measurement coil is installed on the moving portion, and the measurement coil is arranged on the test piecein a sleeving manner; and a response output portion electrically connected with the measurement coil. By applying radio frequency excitation to the tip of the test piece, the excitation response at each location of the test piece is measured by the measurement coil along the test piece so as to calculate a transfer function of the test piece. Therefore, an implant and a human body model can be decoupled by using the transfer function of the test piece, such as the implant, the complex environment coupling of the implant and the human body can be simulated relatively accurately to calculate the radio frequency heating of the implant, and the radio frequency heating of the implant is evaluated relatively accurately.
Description
technical field [0001] The invention relates to the technical field of radio frequency testing, in particular to radio frequency excitation response measurement equipment and a transfer function measurement system. Background technique [0002] Conductors, especially straight-line conductors, will experience radio-frequency heating under radio-frequency field radiation. In some application scenarios, this radio-frequency heating may have serious consequences. For example, when the patient is equipped with implanted medical devices, such as cardiac pacemakers, defibrillators, vagus nerve machines, brain pacemakers, and spinal cord stimulators, when the patient is scanned by magnetic resonance, the role of magnetic resonance Under the environment, the radio frequency heating phenomenon will occur in implanted medical devices, especially when the conductor implant has a slender conductive structure and is in contact with human tissue, the radio frequency heating phenomenon is m...
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Login to View More IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 姜长青龙天罡李路明
Owner TSINGHUA UNIV