Automated patient-specific optimization of three-dimensional double-inversion recovery magnetic resonance imaging

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Refaat E GabrPonnada A Narayana

Abstract

To automatically optimize three-dimensional double-inversion recovery (3D-DIR) MRI of the brain on a patient-by-patient basis. DIR is a powerful MRI technique that allows simultaneous suppression of white matter (WM) and cerebrospinal fluid (CSF) in brain imaging. Unfortunately, the tissue suppression is not always consistent across patients. We propose patient-specific optimization of WM suppression for improved gray matter (GM)-WM contrast. Relaxation times were measured in the same scan session, and through real time processing were used for calculating DIR inversion times for maximum tissue contrast. Signal evolution during the variable-flip-angle turbo-spin-echo readout was calculated using the extended phase graph algorithm. Patient-specific optimization was examined in five healthy volunteers and two multiple sclerosis patients. Two volunteers were scanned twice for reproducibility. The contrast ratios, GM signal-to-noise ratio (SNR), and image histogram were used to assess the performance of this patient-specific approach. Automated optimization of 3D-DIR was successfully completed in all experiments with processing time of ∼1 min. GM-WM contrast ratio tripled with the optimized DIR sequence, with only a 19% decrease in...Continue Reading

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Citations

Feb 5, 2016·Magnetic Resonance in Medical Sciences : MRMS : an Official Journal of Japan Society of Magnetic Resonance in Medicine·Koichiro FutatsuyaYukunori Korogi
Apr 30, 2016·Journal of Magnetic Resonance Imaging : JMRI·Refaat E GabrPonnada A Narayana
Nov 1, 2016·International Journal of Computer Assisted Radiology and Surgery·Refaat E GabrPonnada A Narayana
Nov 22, 2016·Journal of Magnetic Resonance Imaging : JMRI·Refaat E GabrPonnada A Narayana
Dec 10, 2016·AJNR. American Journal of Neuroradiology·A HagiwaraS Aoki
Mar 6, 2018·IEEE Journal of Biomedical and Health Informatics·William J AllenPonnada A Narayana
Sep 19, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hyunyeol LeeJaeseok Park

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