ArticleMagnetic resonance in medicine2017
Potential for high-permittivity materials to reduce local SAR at a pacemaker lead tip during MRI of the head with a body transmit coil at 3 T.
Article in Magnetic resonance in medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Effect of an air layer on the design of high-permittivity material helmets for 7 T magnetic resonance imaging.Magma (New York, N.Y.) · 2026Article
- A new method to improve RF safety of implantable medical devices using inductive coupling at 3.0 T MRI.Magma (New York, N.Y.) · 2023Article
- Novel materials in magnetic resonance imaging: high permittivity ceramics, metamaterials, metasurfaces and artificial dielectrics.Magma (New York, N.Y.) · 2022Review
- A Preliminary Study for Reference RF Coil at 11.7 T MRI: Based on Electromagnetic Field Simulation of Hybrid-BC RF Coil According to Diameter and Length at 3.0, 7.0 and 11.7 T.Sensors (Basel, Switzerland) · 2022Article
- Ceramic resonators for targeted clinical magnetic resonance imaging of the breast.Nature communications · 2020Article
- Modeling radiofrequency responses of realistic multi-electrode leads containing helical and straight wires.Magma (New York, N.Y.) · 2020Article
- Toward whole-cortex enhancement with an ultrahigh dielectric constant helmet at 3T.Magnetic resonance in medicine · 2020Article
- Reducing RF-induced Heating near Implanted Leads through High-Dielectric Capacitive Bleeding of Current (CBLOC).IEEE transactions on microwave theory and techniques · 2019Article
- Improvements of transmit efficiency and receive sensitivity with ultrahigh dielectric constant (uHDC) ceramics at 1.5 T and 3 T.Magnetic resonance in medicine · 2018Article
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Authors and funding
3 authors.
Funding
Abstract
purposeTo illustrate the potential for high permittivity materials to be used in decreasing peak local SAR associated with implants when the imaging region is far from the implant.
methodsWe performed numerical simulations of a human subject with a pacemaker in a body-sized birdcage coil driven at 128 MHz with and without a thin (5 mm) shell of material of high electric permittivity around the head.
resultsFor a shell with relative permittivity of 600, the maximum specific energy absorption rate averaged over any 1 g of tissue near the pacemaker was reduced by 73.5% for a given B
conclusionAlthough further study is required, initial simulations indicate that strategic use of high permittivity materials may broaden the conditions under which patients with certain implants can be imaged safely. Magn Reson Med 78:383-386, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
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