Aug 2026· Medical Physics (Lancaster)· Vol 53· 1 citation· 49 references
Medicine
TL;DR
Direct SAR measurement provides a reliable and quantitative approach for validating RF coil and implant safety, matching the accuracy of conventional scanner‐based thermometry and simulation methods.
Abstract
As MRI continues to advance toward higher field strengths, RF safety assessment has become more complex. Accurate estimation of specific absorption rate (SAR) is essential for evaluating both hardware and implant safety, yet thermometry and simulation‐only approaches face limitations. In addition, these evaluations are typically performed within the MR scanner, where failures or excessive loading can damage the transmit chain and result in costly repairs and scanner downtime. To overcome these challenges, alternative experimental approaches that enable direct and controlled SAR validation outside the MR environment are needed.
A numerical workflow for evaluating radiofrequency (RF) safety for ultra-high field (UHF, 7 T and above) MRI with a local transmit array coil in the presence of conductive objects such as dental retainers is developed.
Egor Berezko, G. Solomakha, N. Avdievich et al.· Magnetic Resonance Imaging· 0 citations
This work presents an open-source, optimized solenoid head coil tailored for the 50 mT open-source scanner (OSII ONE v2.1), set the basis for a fully reliable and reproducible component for the open-source OSII ONE MRI scanner.
Umberto Zanovello, Julia Pfitzer, Ariane Ernst et al.· 1 citation
Background/Objectives: Accurate intraoperative tumour localisation remains challenging in minimally invasive colorectal surgery because tactile palpation is lost and conventional markers can migrate or provide imprecise localisation. Building on a preceding tri-frequency study that identified 13.56 MHz as the preferred...
Bogdan Mocan, M. Mocan, M. Fulea et al.· Italian National Conference...· 0 citations
PURPOSE
To generate accurate EM simulation models of RF coil arrays, improve coil safety validation procedures, and improve RF power management without sacrificing patient safety.
METHODS
A fast, customized RF co-simulation formulation was developed for pTx RF coils, enabling the use of experimentally measured B 1 +...
Mazin M. Mustafa, Ethan Polcyn, Matt Waks et al.· Magnetic Resonance in Medici...· 0 citations
ABSTRACT This work develops and validates a practical method for quantifying the transmit‐power threshold at which passive detuning of inductively coupled wireless resonators becomes reliable in MRI. All experiments were performed using phantoms. A near/far spatial signal ratio is computed from a series of gradient‐ech...
Ming Lu, Xiao-Yu Jiang, Ya-Jun Ma et al.· NMR in Biomedicine· 0 citations
PURPOSE
Detection and offline correction of proton range errors due to incorrect Hounsfield Unit-to-stopping power conversion with minimal (5-10 minute) extension of the patient-facing clinical workflow using a cable-free thermoAcoustic Range Verifier (tARV).
MATERIALS
The accelerator (Mevion Hyperscan) delivered at...
S. Patch, V. Sarkar, Anjali Chiravuri et al.· International Journal of Rad...· 0 citations
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