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Prediction method and prediction device for temperature rise

A prediction method and a technology of a prediction device, which are applied in the direction of measuring devices, magnetic resonance measurement, and measurement of electrical variables, etc., can solve problems such as inability to accurately characterize RF induction heating

Active Publication Date: 2019-03-29
TSINGHUA UNIV
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Problems solved by technology

However, this indicator is still subject to many limitations in use, because B 1+rms is based on the assumption of an ideal signal source and ignores the patient's effect on B 1 field disturbance
In addition, factors such as the shape, angle, and placement of electrodes in implanted medical devices may affect RF-induced heating, however, the effects caused by these factors cannot be measured by SAR and B 1+rms characterize
Therefore, using the current SAR and B 1+rms Metrics sometimes do not accurately characterize RF induced heating

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  • Prediction method and prediction device for temperature rise
  • Prediction method and prediction device for temperature rise
  • Prediction method and prediction device for temperature rise

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[0036] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0037] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0038] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, componen...

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Abstract

The invention provides a prediction method and a prediction device for temperature rise used for predicting the temperature rise of an electrode under a magnetic resonance imaging examination i.e., MRI examination. The prediction method for the temperature rise comprises the following steps: acquiring a B1 image of a particular range around the electrode under the MRI examination; comparing the B1image to a B1 image of a background radio frequency field under the MRI examination to calculate a received coefficient of the electrode; determining a to-be-scanned sequence under the MRI examination and a magnitude of a radio frequency field of the sequence, i.e., B1+rms; determining a B1 field within the particular range according to the received coefficient and the B1+rms of the sequence; andpredicting a temperature rise of the electrode according to the B1 field within the particular range. According to the prediction method and the prediction device for the temperature rise, an RF induction heating can be more accurately characterized under the consideration of the shape, the angle, and the placement position of the electrode, and the like, thereby determining the RF induction heating of the electrode based medical device under the MRI examination.

Description

technical field [0001] The present disclosure relates to the field of medical equipment, in particular to a temperature rise (temperature rise) prediction method and device. Background technique [0002] IMD (Implantable Medical Device, implantable medical device) such as DBS (Deep Brain Stimulation, deep brain stimulation) etc. is a kind of emerging movement disorder treatment method. At present, IMD is widely used in diseases such as PD (Parkinson's disease, Parkinson's disease), dystonia and essential tremor. With the development of MRI (Magnetic Resonance Imaging, magnetic resonance imaging) and more and more implantable medical devices, the number of MRI examinations using implantable devices is increasing rapidly. However, there are certain risks in the application of DBS in MRI, among which RF (Radio Frequency, radio frequency) induced heating is one of the main potential risks. [0003] Currently, SAR (Specific Absorption Rate) is used as the main index to characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R33/48
CPCG01R33/48G01R35/00
Inventor 万森姜长青丁建琦李路明
Owner TSINGHUA UNIV
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