ArticleMagnetic resonance in medicine2020
Individual variation in simulated fetal SAR assessed in multiple body models.
Article in Magnetic resonance in medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
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Who cites it
11 citing papers in PubMed, 18 citations in OpenAlex.
- Quantitative MRI of lipid content for assessing fetal adipose tissue development and brown-to-white fat conversion.Insights into imaging · 2026Article
- Fetal MRI: Radiofrequency Safety Assessment at 3 Tesla.Journal of magnetic resonance imaging : JMRI · 2025Article
- Variable Flip Angle Optimization for Fetal Brain Imaging With Reduced Specific Absorption Rate.NMR in biomedicine · 2025Article
- Local SAR management strategies to use two-channel RF shimming for fetal MRI at 3 T.Magnetic resonance in medicine · 2024Article
- MARIE 2.0: A Perturbation Matrix Based Patient-Specific MRI Field Simulator.IEEE transactions on bio-medical engineering · 2023Article
- Fetal MRI at 3 T: Principles to Optimize Success.Radiographics : a review publication of the Radiological Society of North America, Inc · 2023Article
- Change in T2* measurements of placenta and fetal organs during Braxton Hicks contractions.Placenta · 2022Article
- Safety and imaging performance of two-channel RF shimming for fetal MRI at 3T.Magnetic resonance in medicine · 2021Article
- Fetal Neuroimaging Updates.Magnetic resonance imaging clinics of North America · 2021Review
- Individualized SAR calculations using computer vision-based MR segmentation and a fast electromagnetic solver.Magnetic resonance in medicine · 2021Article
- Image-quality optimization and artifact reduction in fetal magnetic resonance imaging.Pediatric radiology · 2020Review
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 1 country.
Funding
Abstract
purposeWe generate 12 models from 4 pregnant individuals to evaluate individual differences in local specific absorption rate (SAR) for differing body habitus and fetal and maternal positions.
methodsStructural MR images from 4 pregnant subjects (including supine and left-lateral maternal positions) were manually segmented to create 12 body models by rotating the fetus, modifying the fat content, and altering the maternal arm position in 1 of the subjects. Electromagnetic simulations modeled at 3 Tesla determined the average and peak local SAR in the maternal trunk, fetus, fetal brain, and amniotic fluid.
resultsWe observed a significant range of fetal and maternal peak local SAR across the models (maternal trunk: 19.14-44.03 watts/kg, fetus: 9.93-18.79 watts/kg, fetal brain 3.36-10.3 watts/kg). We found that maternal body habitus changes introduced a significant variation in the maternal peak local SAR but not the fetal local SAR. However, the maternal position (either rotating the mother to left-lateral position or altering the arm position) introduced changes in fetal peak local SAR (range: 11.9-17.9 watts/kg). Rotating the fetus also introduced variation in the fetal and fetal brain peak local SAR.
conclusionThe observed variation in SAR emphasizes the need for more anatomical models to enable better safety management of individuals during fetal MRI, including a wider range of gestational ages.
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