Safety
Digital Poster
Physics & Engineering
Tuesday, 12 May 2026
Understanding the safety implications of new hardware and software is essential to developing applications. This session describes advances in RF and gradient safety prediction and ways to measure key safety parameters.
Skill Level: Intermediate
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468-05-001.
Predicting cardiac magnetostimulation thresholds in 56 realistic body models and 13 clinical gradient systems
Impact: Our comprehensive simulations of cardiac
stimulation (CS) in 56 body models and 13 gradient coils indicate that the
gradient amplitude associated with a 10-ppb probability of CS is at least 5.7X higher
than the current IEC CS limit.
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468-05-002.
Mitigation of artefacts from Transceive Phase Assumption improves image-based local SAR estimation
Impact: Today’s model-based
SAR assessments require safety margins which hinder to drive MR sequences with
the full capacity provided by the MR system used. Patient-individual SAR
assessments might reduce these safety margins, thus increasing the freedom for
MR sequence design.
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468-05-003.
Development of Bone-mimicking Phantom for MR-Safety Testing of Orthopedic Implants
Impact: Bone-mimicking phantom testing may help improve MR-safety
assessment of orthopedic implants, including partially bone-touching devices.
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468-05-004.
Adverse Cardiac Effects from Non-ionizing RF Radiation reported in Widely-cited NTP Study: Nonthermal or Thermal?
Impact: Basic consideration of RF energy deposition and thermoregulatory mechanisms of the rat show that cardiac effects reported in the NIH NTP study of exposure to nonionizing RF radiation should be thermal effects, not nonthermal effects as purported in the study.
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468-05-005.
Parallel-Transmit EEG-fMRI at 7T — A simulation safety study
Impact: This study represents a step toward enabling safe EEG-fMRI at 7T with parallel-transmit technology. It highlights cap design strategies that minimize RF interactions, guiding future ultra-high-field multimodal neuroimaging and supporting broader adoption of high-resolution EEG-fMRI in research and clinical applications.
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468-05-006.
Deep Learning-Based Local SAR Assessment in 3T Body MRI: Enhanced Hot Spots Prediction and Analysis of Underlying Mechanisms
Impact: This approach provides more reliable local SAR
assessment and greater sensitivity to safety-critical configurations. Additional
studies into the physical mechanisms underlying skin-to-skin SAR hotspots provide
better understanding of their origins thereby facilitating the prevention of
such hotspots.
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468-05-007.
In Vivo Tissue Heating During 5 T Liver MRI Quantified by Interleaved PRFS Thermometry
Impact: 5T liver MRI now carries real-time PRFS thermometry, revealing a +2°C transient rise inside the magnet while SAR stays legal; protocols can be tuned on-the-fly to protect every future patient.
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468-05-008.
VOP-enabled transmit safety characterisation of a flexible 10Tx/30Rx body array at 7 T
Impact: This work characterises the SAR performance of a conformal 10Tx/30Rx body array at 7 T using Virtual Observation Points (VOPs), demonstrating subject- and anatomy-specific SAR behaviour and paving the way for efficient multi-anatomy pTx imaging and real-time safety optimisation.
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468-05-009.
Towards Practical Systematically Safe MRI for DBS Patients using pTx and GRE-Based Current Estimation
Impact: This work demonstrates that implant-friendly parallel transmit modes can enable safe, accurate MRI of patients with deep brain stimulation electrodes without extra safety margins, potentially transforming post-implant imaging access and safety for the growing DBS patient population.
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468-05-010.
RF noise from within: An active implanted medical device as source of RF noise image artifact
Impact: Image quality deficits during clinical exams can trigger a cascade of MR system troubleshooting, delaying or preventing timely patient care. Recognizing that an RF noise artifact may originate from within the patient can prevent care delays and MR system downtime.
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468-05-011.
Improving RF Safety for Infants Using a High Permittivity Material Helmet at 3T
Impact: The results of this abstract can be used to improve the safety and imaging performance of infant MR scans using whole-body coils at 3T.
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468-05-012.
Feasibility Study of UTE-Image-based SAR Estimation Without B1 mapping at 3T
Impact: This work introduces a rapid UTE-based SAR estimation method that eliminates explicit $|B_1^+|$ mapping, demonstrating strong potential for efficient subject-specific RF safety monitoring from a single short acquisition and paving the way toward clinically practical, image-based SAR assessment at 3T.
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468-05-013.
Modeling and Measurement of Peripheral Nerve Stimulation in the Leg Between 300 Hz and 46 kHz
Impact: Accurate,
validated PNS modeling across a large frequency range is important for the
design and safety assessment of MRI gradient and magnetic particle imaging
(MPI) drive coils and may help the development of novel therapeutic interventions.
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468-05-014.
Switchable Mirrored Box Antenna for Tunable B₁⁺ Field Control and SAR Optimization in an 8-Channel Array at 7T MRI
Impact: The mirrored box approach enables spatially adaptive B₁⁺ control through
switchable hardware states, offering a compact optimization or alternative to
pTx.
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468-05-015.
Application of voxel-wise SAR efficiency as a metric to assess compatibility of novel materials in pTx systems.
Impact: This study
introduces voxel-wise SAR efficiency as a metric to effectively assesses passive materials in
pTx system, revealing their context-specific effects and demonstrating that these
materials can be positively integrated in different pTx
setups to enhance performance.
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468-05-016.
Performance and safety of 7T MRI using patient specific human models
Impact: SAR calculations in real-time using patient
specific human models will allow performing 7T MRI
studies that can advance scientific understanding of the human brain without
compromising safety or regulatory compliance.
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