Asymmetries of the balanced SSFP profile. Part I: theory and observation

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Karla L Miller

Abstract

The signal in balanced steady-state free precession has a strong sensitivity to off-resonance, which is typically described in terms of a signal "profile" over a range of frequencies. This profile has a well-known form for homogeneous media with a single T(1), T(2), and resonance frequency, which is symmetric about the on-resonance frequency. However, a straightforward extension to this established signal model predicts that the profile may become asymmetric in the presence of inhomogeneous frequency content, as would be expected to happen in tissue due to microstructural boundaries, compartments, and chemical shift. The presence of asymmetries in the balanced steady-state free precession profile may therefore provide a marker of tissue integrity. This manuscript describes the theory behind balanced steady-state free precession asymmetries, a method for detecting these effects, and the first measurements of balanced steady-state free precession asymmetries in tissue. Asymmetries are found in gray matter, white matter, and muscle, with excellent reproducibility. A companion paper considers the large white matter asymmetries in more detail.

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Citations

Dec 14, 2011·Topics in Magnetic Resonance Imaging : TMRI·Michael M ZeinehRoland Bammer
Feb 11, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Sarah LarmourRichard B Thompson
Jan 31, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Thomas BenkertFelix A Breuer
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Sep 9, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Damien Nguyen, Oliver Bieri
Jul 25, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Tom HilbertOliver Bieri
Jun 13, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jakob AssländerMartijn A Cloos
Jul 19, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yulia ShcherbakovaLambertus W Bartels
Sep 5, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Soraya GavazziAstrid L H M W van Lier
Dec 25, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Tobias C WoodShaihan J Malik
Jun 2, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Rahel HeuleKlaus Scheffler
Oct 29, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Gopal VarmaAaron K Grant
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Aug 28, 2021·Scientific Reports·Gyula KotekJuan A Hernandez-Tamames
Nov 15, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jessica SchäperOliver Bieri

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