Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Normative volumetric growth modeling of the whole fetal body, placenta, and amniotic fluid for three-dimensional T2-weighted magnetic resonance imaging.

Pediatric radiology·2026
Same author

Neonatal brain structure, cognitively stimulating parenting and behavioural outcomes in preschool children with congenital heart disease and controls.

Scientific reports·2026
Same author

Prenatal air pollution exposure is associated with altered neurodevelopmental outcomes in early childhood.

The Journal of physiology·2026
Same author

Associations between neonatal brain structure and neurodevelopmental outcomes following very preterm birth.

Journal of perinatology : official journal of the California Perinatal Association·2026
Same author

From Offline to Inline Without Pain: A Practical Framework for Translating Offline MR Reconstructions to Inline Deployment Using the Gadgetron Platform.

Magnetic resonance in medicine·2026
Same author

Hippocampal morphometry is altered in infants with congenital heart disease.

Brain communications·2026
Same journal

A Comparison of Tissue Property Values Estimated Using Conventional Cardiac MRF and MT-Cardiac MRF.

Magnetic resonance in medicine·2026
Same journal

Dependence of the Extra-Cellular Diffusion Coefficient on the Fractions of Neurites and Cell Bodies in Gray Matter.

Magnetic resonance in medicine·2026
Same journal

Triple-Pulse <sup>23</sup>Na MRI Sequence (TriNa) for Simultaneous Acquisition of Spin-Density-Weighted and Fluid-Attenuated Images.

Magnetic resonance in medicine·2026
Same journal

Evaluation of Phantom Doping Materials in Quantitative Susceptibility Mapping.

Magnetic resonance in medicine·2026
Same journal

Design of an 8-Channel Transmit 32-Channel Receive 11.7T Head Coil and Evaluation of SNR Gains.

Magnetic resonance in medicine·2026
Same journal

The Potential for Absolute Temperature Imaging Based on Brain Metabolites Using an FID-Shifting Approach in Gradient Echo Planar Spectroscopic Imaging (GREPSI).

Magnetic resonance in medicine·2026
See all related articles

Related Experiment Video

Updated: Dec 21, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.2K

Slice profile correction for transmit sensitivity mapping using actual flip angle imaging.

Shaihan J Malik1, Gavin D Kenny, Joseph V Hajnal

  • 1Robert Steiner MRI unit, Imaging Sciences Department, MRC Clinical Sciences Centre, Hammersmith Hospital campus, Imperial College London, London, United Kingdom. shaihan.malik03@imperial.ac.uk

Magnetic Resonance in Medicine
|April 19, 2011
PubMed
Summary
This summary is machine-generated.

Transmit sensitivity (σ) maps are crucial for parallel transmission MRI. This study simulates slice profiles to accurately generate these maps, achieving high precision with specific radiofrequency pulses.

More Related Videos

Conducting Multiple Imaging Modes with One Fluorescence Microscope
08:32

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

10.1K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.7K

Related Experiment Videos

Last Updated: Dec 21, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.2K
Conducting Multiple Imaging Modes with One Fluorescence Microscope
08:32

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

10.1K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.7K

Area of Science:

  • Magnetic Resonance Imaging
  • Medical Physics
  • Biomedical Engineering

Background:

  • Parallel transmission (pTx) technology in MRI requires rapid generation of transmit sensitivity (σ) maps for clinical application.
  • Actual flip angle (AFA) imaging is an efficient technique for mapping, accurate with 3D encoding and nonselective RF pulses.
  • 2D encoding in AFA imaging introduces systematic errors due to slice profile effects, limiting accuracy.

Purpose of the Study:

  • To develop a method for rapid and accurate generation of σ-maps using AFA imaging, addressing limitations of 2D encoding.
  • To compute the relationship between σ and AFA signals by simulating steady-state slice profiles for various RF pulses.
  • To enable fast reconstruction of σ-maps through pulse-specific lookup tables.

Main Methods:

  • Simulated steady-state slice profiles for slice-selective radiofrequency (RF) pulses.
  • Computed the relationship between transmit sensitivity (σ) and signals from the AFA imaging sequence.
  • Developed pulse-specific lookup tables for reconstructing σ-maps.

Main Results:

  • The developed method accurately generates σ-maps by accounting for slice profile effects.
  • Achieved high precision (±3%) in σ-map generation using a 3-lobe sinc pulse.
  • Demonstrated that σ-maps are sensitive to T(1) in a pulse-dependent manner.

Conclusions:

  • The simulation-based approach enables fast and accurate reconstruction of σ-maps for clinical pTx MRI.
  • The method is versatile and applicable to any RF pulse after initial simulation.
  • This technique overcomes systematic errors associated with 2D encoding in AFA imaging.