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Proposal for local SAR safety margin in pediatric neuro-imaging using 7 T MRI and parallel transmission.
Phys Med Biol
January 2025
CNRS, BAOBAB, CEA, NeuroSpin, Université Paris-Saclay, Gif-sur-Yvette, 91191, FRANCE.
Ultra-high field MRI with parallel transmission (pTx) provides a powerful neuroimaging tool with potential application in paediatrics. The use of pTx, however, necessitates a dedicated local specific absorption rate (SAR) management strategy, able to predict and monitor the peak local SAR (pSAR). In this work, we address the pSARassessment for an in-house built 7 Tesla 16Tx32Rx pediatric head coil, using the concept of Virtual Observation Points (VOPs) for SAR estimation.
View Article and Find Full Text PDFCurrently, available technologies and procedures enable aesthetic dermatologists to provide their patients with beneficial treatment outcomes for a wide variety of skin conditions. These treatments range from laser resurfacing and radiofrequency procedures to chemical peels and microneedling. The concept of integrated skincare is based on the application of adjunct therapies before, during, or after cosmetic medical procedures to promote healing, minimize discomfort, shorten down-time, and enhance overall aesthetic outcomes.
View Article and Find Full Text PDFRenal denervation for hypertension.
Nat Rev Cardiol
January 2025
Division of Cardiology, Columbia University Irving Medical Center, New York, NY, USA.
Innovative therapies for hypertension are desperately needed given the rising prevalence and falling rates of control of hypertension despite an abundance of available medical therapies. Procedural interventions lower blood pressure without depending on adherence to medications, and endovascular renal denervation (RDN) is the interventional procedure with the best evidence base for the treatment of hypertension. After nearly two decades of study, with major refinements to devices, technique and trial design, two different systems for RDN received approval from the FDA in late 2023 for the treatment of hypertension.
View Article and Find Full Text PDFEmerging cancer therapies: targeting physiological networks and cellular bioelectrical differences with non-thermal systemic electromagnetic fields in the human body - a comprehensive review.
Front Netw Physiol
December 2024
Department of Physics, University of Alberta, Edmonton, AB, Canada.
A steadily increasing number of publications support the concept of physiological networks, and how cellular bioelectrical properties drive cell proliferation and cell synchronization. All cells, especially cancer cells, are known to possess characteristic electrical properties critical for physiological behavior, with major differences between normal and cancer cell counterparts. This opportunity can be explored as a novel treatment modality in Oncology.
View Article and Find Full Text PDFOptimized radiofrequency shimming using low-heating B1+-mapping in the presence of deep brain stimulation implants: Proof of concept.
PLoS One
December 2024
Physical Sciences Platform, Sunnybrook Research Institute, Toronto, ON, Canada.
MRI of patients with Deep Brain Stimulation (DBS) implants is constrained due to radiofrequency (RF) heating of the implant lead. However, "RF-shimming" parallel transmission (PTX) has the potential to reduce DBS heating during MRI. As part of using PTX in such a "safe mode", maps of the RF transmission field (B1+) are typically acquired for calibration purposes, with each transmit coil excited individually.
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