The physics of MRI safety

LP Panych, B Madore - Journal of Magnetic Resonance …, 2018 - Wiley Online Library
The main risks associated with magnetic resonance imaging (MRI) have been extensively
reported and studied; for example, everyday objects may turn into projectiles, energy …

Parallel transmission for ultrahigh‐field imaging

F Padormo, A Beqiri, JV Hajnal, SJ Malik - NMR in Biomedicine, 2016 - Wiley Online Library
The development of MRI systems operating at or above 7 T has provided researchers with a
new window into the human body, yielding improved imaging speed, resolution and signal …

SAR simulations & safety

TM Fiedler, ME Ladd, AK Bitz - NeuroImage, 2018 - Elsevier
At ultra-high fields, the assessment of radiofrequency (RF) safety presents several new
challenges compared to low-field systems. Multi-channel RF transmit coils in combination …

Quantitative sodium MR imaging at 7 T: initial results and comparison with diffusion-weighted imaging in patients with breast tumors

O Zaric, K Pinker, S Zbyn, B Strasser, S Robinson… - Radiology, 2016 - pubs.rsna.org
Purpose To investigate the clinical feasibility of a quantitative sodium 23 (23Na) magnetic
resonance (MR) imaging protocol developed for breast tumor assessment and to compare it …

Local specific absorption rate (SAR), global SAR, transmitter power, and excitation accuracy trade‐offs in low flip‐angle parallel transmit pulse design

B Guérin, M Gebhardt, S Cauley… - Magnetic resonance …, 2014 - Wiley Online Library
Purpose We propose a constrained optimization approach for designing parallel transmit
(pTx) pulses satisfying all regulatory and hardware limits. We study the trade‐offs between …

On the way to routine cardiac MRI at 7 Tesla-a pilot study on consecutive 84 examinations

T Reiter, D Lohr, M Hock, MJ Ankenbrand… - PLoS …, 2021 - journals.plos.org
Introduction Cardiac magnetic resonance (CMR) at ultrahigh field (UHF) offers the potential
of high resolution and fast image acquisition. Both technical and physiological challenges …

Interventional CMR: clinical applications and future directions

T Rogers, RJ Lederman - Current cardiology reports, 2015 - Springer
Interventional cardiovascular magnetic resonance (iCMR) promises to enable radiation-free
catheterization procedures and to enhance contemporary image guidance for structural …

MR performance in the presence of a radio frequency-penetrable positron emission tomography (PET) insert for simultaneous PET/MRI

BJ Lee, AM Grant, CM Chang… - IEEE transactions on …, 2018 - ieeexplore.ieee.org
Despite the great promise of integrated positron emission tomography (PET)/magnetic
resonance (MR) imaging to add molecular information to anatomical and functional MR, its …

Fast design of local N‐gram‐specific absorption rate–optimized radiofrequency pulses for parallel transmit systems

A Sbrizzi, H Hoogduin, JJ Lagendijk… - Magnetic …, 2012 - Wiley Online Library
Designing multidimensional radiofrequency pulses for clinical application must take into
account the local specific absorption rate (SAR) as controlling the global SAR does not …

Dynamic contrast-enhanced magnetic resonance imaging of breast tumors at 3 and 7 T: a comparison

S Gruber, K Pinker, O Zaric, L Minarikova… - Investigative …, 2014 - journals.lww.com
Objectives The objective of this study was to compare the image quality, contrast
enhancement behavior, and diagnostic value of bilateral 3-dimensional dynamic contrast …