Convex optimization of MRI exposure for mitigation of RF-heating from active medical implants

Physics in Medicine and Biology
Juan CórcolesNiels Kuster

Abstract

Local RF-heating of elongated medical implants during magnetic resonance imaging (MRI) may pose a significant health risk to patients. The actual patient risk depends on various parameters including RF magnetic field strength and frequency, MR coil design, patient's anatomy, posture, and imaging position, implant location, RF coupling efficiency of the implant, and the bio-physiological responses associated with the induced local heating. We present three constrained convex optimization strategies that incorporate the implant's RF-heating characteristics, for the reduction of local heating of medical implants during MRI. The study emphasizes the complementary performances of the different formulations. The analysis demonstrates that RF-induced heating of elongated metallic medical implants can be carefully controlled and balanced against MRI quality. A reduction of heating of up to 25 dB can be achieved at the cost of reduced uniformity in the magnitude of the B(1)(+) field of less than 5%. The current formulations incorporate a priori knowledge of clinically-specific parameters, which is assumed to be available. Before these techniques can be applied practically in the broader clinical context, further investigations are neede...Continue Reading

References

Jul 13, 2001·Nature·N K LogothetisA Oeltermann
Jan 5, 2002·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Christopher J YeungErgin Atalar
Dec 25, 2004·European Heart Journal·Roger LuechingerPeter Boesiger
Jun 22, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Steffen WeissBernhard Gleich
Sep 8, 2006·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Weihua MaoChristopher M Collins
Oct 10, 2006·IEEE Transactions on Medical Imaging·Tamer S Ibrahim
Feb 28, 2007·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Cornelis A T Van den BergJan J W Lagendijk
May 24, 2007·Journal of Magnetic Resonance Imaging : JMRI·Tamer S Ibrahim, Lin Tang
Sep 1, 2007·Physics in Medicine and Biology·Bob van den BergenJan J W Lagendijk
Oct 31, 2007·Journal of Magnetic Resonance Imaging : JMRI·Sung-Min ParkJohn A Nyenhuis
Apr 3, 2008·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·K SetsompopE Adalsteinsson
Apr 2, 2009·IEEE Transactions on Medical Imaging·Shumin WangJeff H Duyn
Apr 19, 2011·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yigitcan EryamanErgin Atalar
May 25, 2011·Concepts in Magnetic Resonance. Part B, Magnetic Resonance Engineering·Lin TangTamer S Ibrahim
Jan 11, 2012·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ingmar GraesslinUlrich Katscher
Aug 30, 2012·IEEE Transactions on Bio-medical Engineering·Hyoungsuk YooJ Thomas Vaughan
Jun 21, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yigitcan EryamanLawrence L Wald
Dec 3, 2014·Clinical Neurology and Neurosurgery·Karl A SillayKarl K Vigen

❮ Previous
Next ❯

Citations

Mar 1, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Clare E McElcheranSimon J Graham
Jun 13, 2018·Physics in Medicine and Biology·Qi ZengJi Chen
Mar 3, 2017·Physics in Medicine and Biology·Juan CórcolesNiels Kuster
May 28, 2020·Journal of Magnetic Resonance Imaging : JMRI·Lukas WinterBernd Ittermann
Jun 3, 2021·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Irene Rubia-RodríguezDaniel Ortega
Aug 11, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yu WangJi Chen
Aug 17, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Berk SilemekLukas Winter

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cajal Bodies & Gems

Cajal bodies or coiled bodies are dense foci of coilin protein. Gemini of Cajal bodies, or gems, are microscopically similar to Cajal bodies. It is believed that Cajal bodies play important roles in RNA processing while gems assist the Cajal bodies. Find the latest research on Cajal bodies and gems here.

Related Papers

Journal of Magnetic Resonance Imaging : JMRI
C R CamachoR M Henkelman
Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie
Marc RegierArndt Klocke
Journal of the National Comprehensive Cancer Network : JNCCN
Edward C Li
© 2021 Meta ULC. All rights reserved