Work

Radio-Frequency Energy-Induced Heating for hot spots with the same SAR averaged over 0.1 gram without perfusion

Year: 2024

Type: conference-paper

Abstract: Motivation: Evaluating induced temperature rise (ΔT) in human tissue at a hot spot. Goal(s): Comprehensive analysis of ΔT by examining cases where SAR0.1 g (SAR, specifically averaged over a mass of 0.1 gram of human tissue) remains constant but the spatial distribution of SAR inside and outside the averaging volume is different. Approach: Analytical solutions were obtained for estimating ΔT as a result of the SAR distribution exhibiting spherical symmetry with both uniform and Gaussian distributions. Results: Using SAR0.1g without consideration of the distribution of SAR within and outside the enclosed volume cannot be a reliable tool for estimation of ΔT. Impact: We have obtained analytical results on the effect of the SAR distribution on the conservatively estimated ΔT in different RF exposure scenarios.

Source: Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition

DOI: 10.58530/2024/3732

Authors: Mikhail Kozlov, Nicolas Boulant

Language: English

Topic: Electromagnetic Fields and Biological Effects

Subfield: Biophysics

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: green

Funder: European Commission

Award: Accurate, Reliable and Optimized functional MAgnetic resonance imaging at unprecedented field strength for unique exploration of the human brain