Investigation of Artifacts and Optimization in Proton Resonance Frequency Thermometry towards Heating Risk Monitoring of Implantable Medical Devices in Magnetic Resonance Imaging

2021 ◽  
pp. 1-1
Author(s):  
Feng Zhang ◽  
Changqing Jiang ◽  
Yichao Li ◽  
Xiaoyue Niu ◽  
Long Tiangang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Frequency ◽  
Medical Devices ◽  
Proton Resonance Frequency ◽  
Resonance Imaging ◽  
Proton Resonance ◽  
Implantable Medical Devices ◽  
Risk Monitoring

MRI-visible polymer based on poly(methyl methacrylate) for imaging applications

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5754-5760 ◽  
Author(s):  
Mira Younis ◽  
Vincent Darcos ◽  
Cédric Paniagua ◽  
Pauline Ronjat ◽  
Laurent Lemaire ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Methyl Methacrylate ◽  
Contrast Agents ◽  
Medical Devices ◽  
Resonance Imaging ◽  
Implantable Medical Devices ◽  
Poly Methyl Methacrylate ◽  
Magnetic Resonance Imaging Mri

Macromolecular contrast agents are very attractive to afford efficient magnetic resonance imaging (MRI) visualization of implantable medical devices.

Highly sensitive magnetic resonance compatible temperature measurement system

2020 ◽  
pp. 66-71
Author(s):  
Dmitry S. Semenov ◽  
Ekaterina S. Akhmad ◽  
Vasily A. Yatseev ◽  
Yurij A. Vasilev ◽  
Kristina A. Sergunova ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Optical Fibers ◽  
Medical Devices ◽  
Measurement System ◽  
Radiation Thermometry ◽  
Calibration Method ◽  
Resonance Imaging ◽  
Implantable Medical Device ◽  
Implantable Medical Devices

One of the steps in determining the compliance of an implantable medical device with the safety requirements in magnetic resonance imaging (MRI) is the experimental assessment of its heating over the course of the study. However, the application of traditional methods, such as thermocouple measurements or radiation thermometry, is difficult in connection with the conditions of high magnetic fields. A spectrometric system is proposed for measuring temperature in a magnetic resonance imaging cabinet with sensitivity of 0.01 °C and error of 0.1 % in the range of 10–50 °C. Temperature sensors are Fabry–Perot interferometers formed by flat ends of optical fibers located at a distance of about tens of micrometers. A design of the sensor and a calibration method are described. A design of the sensor and a calibration method are described. The system was tested in the process of two passive implants heating in 1,5 T MRI. As a result, compliance with the accepted recommendations for assessing the heating of implantable medical devices in MRI was demonstrated, and the temperature rise value was obtained that was comparable to the manufacturer’s tests of this product according to ASTM F 2182. The presented measurement system can be used to assess the MR-compatibility of implantable medical devices, to develop scanning protocols for patients with metal structures, as well as to confirm or refine mathematical models of heat transfer.

Open Source Medical Devices for Innovation, Education and Global Health: Case Study of Open Source Magnetic Resonance Imaging

2018 ◽  
pp. 147-163
Author(s):  
Lukas Winter ◽  
Ruben Pellicer-Guridi ◽  
Lionel Broche ◽  
Simone A. Winkler ◽  
Henning M. Reimann ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Global Health ◽  
Open Source ◽  
Medical Devices ◽  
Resonance Imaging
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