Article detail · 2010
Reduction of implant RF heating through modification of transmit coil electric field
Journal
Magnetic Resonance in Medicine- Year
- 2010
- Type
- article
Data source split
- YÖKSİS venue Magnetic Resonance in Medicine
- OpenAlex OpenAlex enrichment (abstract, citations, topics)
Abstract
OpenAlex · English
In this work, we demonstrate the possibility to modify the electric-field distribution of a radio frequency (RF) coil to generate electric field-free zones in the body without significantly altering the transmit sensitivity. Because implant heating is directly related to the electric-field distribution, implant-friendly RF transmit coils can be obtained by this approach. We propose a linear birdcage transmit coil with a zero electric-field plane as an example of such implant-friendly coils. When the zero electric-field plane coincides with the implant position, implant heating is reduced, as we demonstrated by the phantom experiments. By feeding RF pulses with identical phases and shapes but different amplitudes to the two orthogonal ports of the coil, the position of the zero electric-field plane can also be adjusted. Although implant heating is reduced with this method, a linear birdcage coil results in a whole-volume average specific absorption rate that is twice that of a quadrature birdcage coil. To solve this issue, we propose alternative methods to design implant-friendly RF coils with optimized electromagnetic fields and reduced whole-volume average specific absorption rate. With these methods, the transmit field was modified to reduce RF heating of implants and obtain uniform transmit sensitivity.
Topics
Citations
OpenAlex cited_by_count. Not a WoS or Scopus citation count; those sources have no separate column here.
96 citations
OpenAlex cited_by_count (cache / database)
18 publications in the local catalog that cite this work (OpenAlex reference match; not the full global list).
- Reconfigurable MRI technology for low-SAR imaging of deep brain stimulation at 3T: Application in bilateral leads, fully-implanted systems, and surgically modified lead trajectories 2019
- Reduction of the radiofrequency heating of metallic devices using a dual-drive birdcage coil 2013
- Reduction of radiofrequency heating of metallic devices using a dual drive birdcage coil 2013
- RF heating of deep brain stimulation implants in open‐bore vertical MRI systems: A simulation study with realistic device configurations 2019
- A temperature sensor implant for active implantable medical devices for in vivo subacute heating tests under MRI 2018
- A temperature sensor implant for active implantable medical devices for in vivo subacute heating tests under MRI 2017
- MR safety watchdog for active catheters: Wireless impedance control with real‐time feedback 2020
- Effect of field strength on RF power deposition near conductive leads: A simulation study of SAR in DBS lead models during MRI at 1.5 T-10.5 T 2023
- In vivo MRI with Concurrent Excitation and Acquisition using Automated Active Analog Cancellation 2018
- RF heating of deep brain stimulation implants during MRI in 1.2 T vertical scanners versus 1.5 T horizontal systems: A simulation study with realistic lead configurations 2020