ArticleMagnetic resonance in medicine2021
Specific absorption rate and temperature in neonate models resulting from exposure to a 7T head coil.
Article in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed.
- A size-adaptive RF coil for MRI of the pediatric human brain at 7 T.Magnetic resonance in medicine · 2025Article
- Precision functional imaging in infants using multi-echo fMRI at 7T.bioRxiv : the preprint server for biology · 2025Article
- 7 Tesla fMRI characterisation of the cortical-depth-dependent BOLD response in early human development.bioRxiv : the preprint server for biology · 2025Article
- A closer look: pediatric neuroimaging at 7T.Pediatric radiology · 2025Review
- TMagnetic resonance in medicine · 2025Article
- Functional organization of the neonatal thalamus across development depicted by functional MRI.Imaging neuroscience (Cambridge, Mass.) · 2025Article
- Introduction of ultra-high-field MR brain imaging in infants: vital parameters, temperature and comfort.Neuroimage. Reports · 2023Article
- Actual patient position versus safety models: Specific Absorption Rate implications of initial head position for Ultrahigh Field Magnetic Resonance Imaging.NMR in biomedicine · 2023Article
- A high-resolution pediatric female whole-body numerical model with comparison to a male model.Physics in medicine and biology · 2023Article
- High resolution and contrast 7 tesla MR brain imaging of the neonate.Frontiers in radiology · 2023Article
- A New Combination of Radio-Frequency Coil Configurations Using High-Permittivity Materials and Inductively Coupled Structures for Ultrahigh-Field Magnetic Resonance Imaging.Sensors (Basel, Switzerland) · 2022Article
- Safety for Human MR Scanners at 7T.Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine · 2022Article
- Towards an integrated neonatal brain and cardiac examination capability at 7 T: electromagnetic field simulations and early phantom experiments using an 8-channel dipole array.Magma (New York, N.Y.) · 2022Article
- Evaluation of specific absorption rate and heating in children exposed to a 7T MRI head coil.Magnetic resonance in medicine · 2022Article
- 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
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Authors and funding
5 authors.
Funding
Abstract
purposeTo investigate safe limits for neonatal imaging using a 7T head coil, including both specific absorption rate (SAR) and temperature predictions.
methodsHead-centered neonate models were simulated using finite-difference time domain-based electromagnetic and thermal solvers. The effects of higher water content of neonatal tissues compared with adults, position shifts, and thermal insulation were also considered. An adult model was simulated for comparison.
resultsMaximum and average SAR are both elevated in the neonate when compared with an adult model. When normalized to
conclusionThis study of two neonate models cannot quantify the variability expected within a larger population. Likewise, the use of age-adjusted dielectric properties have a significant effect, but while their use is well motivated by literature, there is uncertainty in the true dielectric properties of neonatal tissue. Nevertheless, the main finding is that unlike at lower field strengths, operational limits for 7T neonatal MRI using an adult head coil should be more conservative than limits for use on adults.
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