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
Oct 22, 2003·Journal of Neurosurgery·Jörg SpiegelUlrich Dillmann
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
Nov 9, 2005·Magnetic Resonance Imaging·Robert W GrayFrank G Shellock
Nov 15, 2005·Neurosurgery·Jaimie M HendersonAli R Rezai
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
Dec 19, 2009·Physics in Medicine and Biology·Andreas ChristNiels Kuster
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
Sep 17, 2011·Magma·Hanno HomannPeter Börnert
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
Oct 13, 2012·Bioelectromagnetics·Eugenia CabotNiels Kuster
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
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
Jan 10, 2019·Physics in Medicine and Biology·Bastien GuerinLawrence L Wald
Mar 3, 2017·Physics in Medicine and Biology·Juan CórcolesNiels Kuster
Aug 10, 2019·Bioelectromagnetics·Aiping YaoNiels Kuster
May 28, 2020·Journal of Magnetic Resonance Imaging : JMRI·Lukas WinterBernd Ittermann
May 10, 2020·Medical Physics·Janot P TokayaAlexander J E Raaijmakers
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
Nov 28, 2017··Juan CorcolesNiels Kuster
Nov 28, 2017··Niels KusterEarl Zastrow