Method for monitoring temperatures of tissues around active implantation object and magnetic resonance imaging system

Abstract

The invention relates to a method for monitoring temperatures of tissues around an active implantation object. The method is based on magnetic resonance temperature measurement technologies and adopts a magnetic resonance imaging system, wherein the magnetic resonance imaging system is used to generate at least one sequence 2 which is applied to clinical inspection or scientific researches or other purposes, as well as a sequence 3 applied to temperature distribution measurement. The method comprises the steps that (S11) the sequence 2 is used for scanning, and scanning of the temperature measurement sequence 3 is conducted alternately in the sequence 2; and (S12), safety evaluation is conducted according to a scanning result of the temperature measurement sequence 3. The method has the advantages that radio frequency temperature rise during MRI scanning of a patient carrying an implanted medical appliance can be monitored effectively; and hidden safety risks can be eliminated.

Description

technical field [0001] The present invention relates to the technical field related to medical devices, in particular, to a method for real-time monitoring of tissue temperature around active implants under MR based on magnetic resonance (Magnetic Resonance, MR) temperature measurement 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 ...

AI Technical Summary

Problems solved by technology

MR thermometry is only used as a monitoring method

For the radiofrequency heating of implantable medical devices under nuclear magnetic resonance, the heating comes from the MRI scan itself, and the scanning sequences have their own purposes and have different parameters. They are very different from the scanning of MR thermometry, and cannot be obtained from scanning sequences for other purposes. Get temperature information from

[0014] In addition, metal conductors in implantable medical devices will also cause distortion of the surrounding magnetic field due to magnetization under the magnetic field of MRI, which will cause image artifacts, making the MRI signal near the conductor lost or seriously distorted

The radio frequency induction heating is the most serious near the conductor, which is also a problem in the current application of MR thermometry.

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