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Method for active implant surrounding organization temperature under early evaluation MR and magnetic resonance imaging system

A magnetic resonance imaging and surrounding tissue technology, applied in the field of medical devices, can solve problems such as the inability to accurately predict the radio frequency temperature rise of medical devices

Active Publication Date: 2017-06-27
TSINGHUA UNIV
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Problems solved by technology

It is currently impossible to accurately predict the RF temperature rise of medical devices before each patient scan

Method used

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  • Method for active implant surrounding organization temperature under early evaluation MR and magnetic resonance imaging system
  • Method for active implant surrounding organization temperature under early evaluation MR and magnetic resonance imaging system
  • Method for active implant surrounding organization temperature under early evaluation MR and magnetic resonance imaging system

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Embodiment Construction

[0057] The invention provides a method for pre-estimating the tissue temperature around an active implant under MR and giving a safety assessment and a magnetic resonance imaging system using the method. The active implant can be a cardiac pacemaker, defibrillator, deep brain stimulator, spinal cord stimulator, vagus nerve stimulator, gastrointestinal stimulator or other similar implanted medical devices. The present invention is only described by taking the deep brain electrical stimulator as an example, and the present invention is further described in conjunction with the accompanying drawings.

[0058] See figure 1 , the deep brain electrical stimulator 10 includes: an external programmer 11, a pulse generator 12 implanted in the body, an extension wire 14 and a stimulating electrode 16. The external programmer 11 controls the pulse generator 12 to generate a certain pattern of current pulses, which are transmitted to the electrode contacts 18 of the stimulating electrode...

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Abstract

The present invention relates to a method for active implant surrounding organization temperature under early evaluation MR (Magnetic Resonance). The method is suitable for a magnetic resonance imaging system. The magnetic resonance imaging system is configured to generate a temperature measurement sequence, a test sequence and a sequence to be scanned. The method comprises: the step S20, prior to the enforcement of the test sequence, employing the temperature measurement sequence to perform temperature measurement for M times, wherein M>=1; the step S30, enforcing the test sequence, employing the temperature measurement sequence for temperature measurement for N times in the process, wherein N>=0; the step S40, after the enforcement of the test sequence, employing the temperature measurement sequence to perform temperature measurement for P times, wherein P >=1; and the step S50, calculating safety indexes according to the related parameters of the radio frequency energy of the test sequence and the related parameters of the radio frequency energy of the sequence to be scanned, comparing the safety indexes with a threshold, if the condition is safe, performing scanning, or else, rejecting scanning.

Description

technical field [0001] The present invention relates to the related technical field of medical devices, in particular, to a method for pre-estimating the tissue temperature around an active implant under MR based on magnetic resonance (Magnetic Resonance, MR) thermometry technology and a magnetic resonance imaging system using the method . Background technique [0002] Compared with other imaging techniques (such as X-ray, CT, etc.), Magnetic Resonance Imaging (MRI) has significant advantages: MRI is clearer, has a high resolution for soft tissues, and There is no ionizing radiation damage to the human body. Therefore, magnetic resonance imaging technology is widely used in the clinical diagnosis of modern medicine. Today, it is estimated that at least 60 million cases worldwide are examined using MRI technology every year. [0003] When MRI works, three magnetic fields come into play. A high-intensity uniform static magnetic field B 0 , a gradient field G and a radio f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/20A61B5/055
CPCA61B5/055G01R33/20
Inventor 姜长青张锋丁建琦董延涛李路明
Owner TSINGHUA UNIV
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