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Related Concept Videos

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Related Experiment Video

Updated: Jan 23, 2026

Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
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Parallel Transmission for Ultrahigh Field MRI.

Cem M Deniz1,2

  • 1Center for Advanced Imaging Innovation and Research (CAI2R) and Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY.

Topics in Magnetic Resonance Imaging : TMRI
|June 13, 2019
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Summary

Parallel RF transmission (pTx) overcomes challenges in ultrahigh magnetic field (UHF) MRI, improving radiofrequency (RF) excitation and safety. This review covers pTx pulse design, RF safety, and advanced techniques for UHF applications.

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Area of Science:

  • Medical Imaging
  • Physics
  • Engineering

Background:

  • Ultrahigh magnetic fields (UHF) in MRI offer higher signal-to-noise ratio and spectral resolution.
  • Technological hurdles like RF energy deposition and excitation inhomogeneity limit UHF MRI benefits.
  • Parallel RF transmission (pTx) utilizes multiple, independently controlled RF coils to mitigate these UHF challenges.

Purpose of the Study:

  • To review recent advancements in parallel RF transmission (pTx) for ultrahigh magnetic field (UHF) MRI.
  • To highlight developments in pTx pulse design and radiofrequency (RF) safety protocols.
  • To discuss the application of pTx in simultaneous multislice and inner volume imaging at UHF.

Main Methods:

  • Review of recent literature on pTx pulse design and RF safety.
  • Focus on pTx applications in simultaneous multislice and inner volume imaging at UHF.
  • Exploration of emerging pTx design frameworks, calibration strategies, and calibration-free approaches.

Main Results:

  • pTx effectively reduces RF excitation inhomogeneity and energy deposition in UHF MRI.
  • Advancements in pTx pulse design and calibration-free methods enhance practical implementation.
  • Improved RF safety through intersubject variability analysis and temperature-based monitoring.

Conclusions:

  • pTx is crucial for realizing the full potential of UHF MRI.
  • Ongoing developments in pTx design and safety are expanding its clinical applicability.
  • pTx enables advanced imaging techniques like simultaneous multislice and inner volume imaging at UHF.