NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping

Ramos Llordén, Gabriel and Vegas Sánchez-Ferrero, Gonzalo and Björk, Marcus and Vanhevel, Floris and Parizel, Paul M. and San José Estépar, Raúl and Dekker, Arnold J. den and Sijbers, Jan (2018). NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping. "IEEE transactions on medical imaging", v. 37 (n. 11); pp. 2414-2427. ISSN 0278-0062. https://doi.org/10.1109/TMI.2018.2833288.

Description

Title: NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping
Author/s:
  • Ramos Llordén, Gabriel
  • Vegas Sánchez-Ferrero, Gonzalo
  • Björk, Marcus
  • Vanhevel, Floris
  • Parizel, Paul M.
  • San José Estépar, Raúl
  • Dekker, Arnold J. den
  • Sijbers, Jan
Item Type: Article
Título de Revista/Publicación: IEEE transactions on medical imaging
Date: November 2018
ISSN: 0278-0062
Volume: 37
Subjects:
Freetext Keywords: T1 mapping; variable flip angle; SPGR; DESPOT1; relaxometry
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In quantitative magnetic resonance T1 mapping, the variable flip angle (VFA) steady state spoiled gradient recalled echo (SPGR) imaging technique is popular as it provides a series of high resolution T1 weighted images in a clinically feasible time. Fast, linear methods that estimate T1 maps from these weighted images have been proposed, such as DESPOT1 and iterative re-weighted linear least squares. More accurate, non-linear least squares (NLLS) estimators are in play, but these are generally much slower and require careful initialization. In this paper, we present NOVIFAST, a novel NLLS-based algorithm specifically tailored to VFA SPGR T1 mapping. By exploiting the particular structure of the SPGR model, a computationally efficient, yet accurate and precise T1 map estimator is derived. Simulation and in vivo human brain experiments demonstrate a twenty-fold speed gain of NOVIFAST compared with conventional gradient-based NLLS estimators while maintaining a high precision and accuracy. Moreover, NOVIFAST is eight times faster than the efficient implementations of the variable projection (VARPRO) method. Furthermore, NOVIFAST is shown to be robust against initialization.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7291820MVISIONUnspecifiedMVISION

More information

Item ID: 55074
DC Identifier: http://oa.upm.es/55074/
OAI Identifier: oai:oa.upm.es:55074
DOI: 10.1109/TMI.2018.2833288
Official URL: https://ieeexplore.ieee.org/document/8371285
Deposited by: Memoria Investigacion
Deposited on: 27 May 2019 15:02
Last Modified: 27 May 2019 15:02
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