<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping"^^ . "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."^^ . "2018-11" . . "37" . "11" . . "IEEE"^^ . . . "IEEE transactions on medical imaging"^^ . . . "02780062" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Raúl"^^ . "San José Estépar"^^ . "Raúl San José Estépar"^^ . . "Arnold J. den"^^ . "Dekker"^^ . "Arnold J. den Dekker"^^ . . "Floris"^^ . "Vanhevel"^^ . "Floris Vanhevel"^^ . . "Gabriel"^^ . "Ramos Llordén"^^ . "Gabriel Ramos Llordén"^^ . . "Gonzalo"^^ . "Vegas Sánchez-Ferrero"^^ . "Gonzalo Vegas Sánchez-Ferrero"^^ . . "Paul M."^^ . "Parizel"^^ . "Paul M. Parizel"^^ . . "Jan"^^ . "Sijbers"^^ . "Jan Sijbers"^^ . . "Marcus"^^ . "Björk"^^ . "Marcus Björk"^^ . . . . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (PDF)"^^ . . . "INVE_MEM_2018_299398.pdf"^^ . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (Other)"^^ . . . . . . "preview.jpg"^^ . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (Other)"^^ . . . . . . "medium.jpg"^^ . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (Other)"^^ . . . . . . "small.jpg"^^ . . . "NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #55074 \n\nNOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI T1 Mapping\n\n" . "text/html" . . . "Telecomunicaciones"@es . "Telecommunications"@en . .