Evaluating quantitative proton‐density‐mapping methods

A Mezer, A Rokem, S Berman, T Hastie, BA Wandell - 2016 - Wiley Online Library
Quantitative magnetic resonance imaging (qMRI) aims to quantify tissue parameters by
eliminating instrumental bias. We describe qMRI theory, simulations, and software designed …

PD: proton density of tissue water

PS Tofts - Quantitative MRI of the brain: Measuring changes …, 2003 - Wiley Online Library
Proton density (PD) refers to the concentration of protons in tissue, protons being the
hydrogen nuclei that resonate and give rise to the NMR signal. Since most visible tissue …

Correction of systematic errors in quantitative proton density mapping

S Volz, U Nöth, R Deichmann - Magnetic Resonance in …, 2012 - Wiley Online Library
Interest in techniques yielding quantitative information about brain tissue proton densities is
increasing. In general, all parameters influencing the signal amplitude are mapped in …

Quantitative proton density mapping: correcting the receiver sensitivity bias via pseudo proton densities

S Volz, U Nöth, A Jurcoane, U Ziemann, E Hattingen… - Neuroimage, 2012 - Elsevier
Most methods for mapping proton densities (PD) in brain tissue are based on measuring all
parameters influencing the signal intensity with subsequent elimination of any weighting not …

Quantitative T1 and proton density mapping with direct calculation of radiofrequency coil transmit and receive profiles from two‐point variable flip angle data

S Baudrexel, SC Reitz, S Hof, RM Gracien… - NMR in …, 2016 - Wiley Online Library
Quantitative T1 mapping of brain tissue is frequently based on the variable flip angle (VFA)
method, acquiring spoiled gradient echo (GE) datasets at different excitation angles …

Primary multiparametric quantitative brain MRI: state-of-the-art relaxometric and proton density mapping techniques

H Jara, O Sakai, E Farrher, AM Oros-Peusquens… - Radiology, 2022 - pubs.rsna.org
This review on brain multiparametric quantitative MRI (MP-qMRI) focuses on the primary
subset of quantitative MRI (qMRI) parameters that represent the mobile (“free”) and bound …

Quantitative spectroscopic imaging with in situ measurements of tissue water T1, T2, and density

C Gasparovic, H Neeb, DL Feis… - … in Medicine: An …, 2009 - Wiley Online Library
The use of tissue water as a concentration standard in proton magnetic resonance
spectroscopy (1H‐MRS) of the brain requires that the water proton signal be adjusted for …

The role of gray and white matter segmentation in quantitative proton MR spectroscopic imaging

A Tal, II Kirov, RI Grossman, O Gonen - NMR in Biomedicine, 2012 - Wiley Online Library
Since the brain's gray matter (GM) and white matter (WM) metabolite concentrations differ,
their partial volumes can vary the voxel's 1H MR spectroscopy (1H‐MRS) signal, reducing …

[HTML][HTML] How stable is quantitative MRI?–Assessment of intra-and inter-scanner-model reproducibility using identical acquisition sequences and data analysis …

RM Gracien, M Maiworm, N Brüche, M Shrestha… - Neuroimage, 2020 - Elsevier
Abstract Background Quantitative MRI (qMRI) techniques allow assessing cerebral tissue
properties. However, previous studies on the accuracy of quantitative T1 and T2 mapping …

Quantitative magnetic resonance imaging of brain anatomy and in vivo histology

N Weiskopf, LJ Edwards, G Helms… - Nature Reviews …, 2021 - nature.com
Quantitative magnetic resonance imaging (qMRI) goes beyond conventional MRI, which
aims primarily at local image contrast. It provides specific physical parameters related to the …