ArticleMagnetic resonance in medicine2019
A simulation study on the effect of optimized high permittivity materials on fetal imaging at 3T.
Article in Magnetic resonance in medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Improving Image Quality and Decreasing SAR With High Dielectric Constant Pads in 3 T Fetal MRI.Journal of magnetic resonance imaging : JMRI · 2025Article
- Improved Fetal Magnetic Resonance Imaging Using a Flexible Metasurface.NMR in biomedicine · 2025Article
- Novel materials in magnetic resonance imaging: high permittivity ceramics, metamaterials, metasurfaces and artificial dielectrics.Magma (New York, N.Y.) · 2022Review
- Parallel transmission 2D RARE imaging at 7T with transmit field inhomogeneity mitigation and local SAR control.Magnetic resonance imaging · 2022Article
- A simulation study on the effect of optimized high permittivity materials on fetal imaging at 3T.Magnetic resonance in medicine · 2019Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeOne of the main concerns in fetal MRI is the radiofrequency power that is absorbed both by the mother and the fetus. Passive shimming using high permittivity materials in the form of "dielectric pads" has previously been shown to increase the
methodsPregnant models in the 3rd, 7th, and 9th months of gestation were used for simulations in a birdcage coil at 3T. Dielectric pads were optimized regions of interest (ROI) using previously developed methods for
resultsThe optimized dielectric pads increased the transmit efficiency up to 55% and increased the
conclusionSimulations have shown that optimized high permittivity pads can reduce SAR in pregnant subjects at the 3rd, 7th, and 9th month of gestation, while improving the transmit field homogeneity in the fetus. However, significantly more work is required to demonstrate that fetal imaging is safe under standard operating conditions.
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