# Magnetic Resonance in Medicine

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*p*O

_{2}) in a single 6‐sec breath hold, for use in human subjects with impaired lung function. Like previously described methods,

*p*O

_{2}values are obtained by measuring the oxygen‐induced

*T*

_{1}relaxation of inhaled hyperpolarized

^{3}He. Unlike other methods, only two

^{3}He images are acquired: one with reverse‐centric...

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*T*

_{2}relaxation time is a promising MRI parameter for the detection of cartilage degeneration in osteoarthritis. However, the accuracy and precision of the measured

*T*

_{2}may be substantially impaired by the low signal‐to‐noise ratio of images available from clinical examinations. The purpose of this work was to assess the accuracy and precision of the traditional fit methods (linear least‐squares regression...

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*k*‐space sampling for nonlinear sparse MRI reconstruction is phrased as a Bayesian experimental design problem. Bayesian inference is approximated by a novel relaxation to standard signal processing primitives, resulting in an efficient optimization algorithm for Cartesian and spiral trajectories. On clinical resolution brain image data from a Siemens 3T scanner, automatically optimized...

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*k*‐space data are consistent. Errors in the navigator information, however, result in residual errors in each

*k*‐space line. This paper presents...

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*R*‐values) of the gadolinium diethylene triamine pentaacetic acid (Gd(DTPA)

^{2−}) ions in a series of skim‐milk solutions at 0–40% milk concentrations were measured using NMR spectroscopy. The

*R*‐value was found to be approximately linearly proportional to the concentration of the solid component in the milk solution. Using the

*R*‐value at 20% solid component (approximately the solid concentration...

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*T*

_{2}(q

*T*

_{2}) analysis involves creating

*T*

_{2}distributions using a regularized algorithm from region‐of‐interest averaged decay data. This study uses q

*T*

_{2}analysis of simulated and experimental decay signals to determine how (a) noise‐type, (b) regularization, and (c) region‐of‐interest versus multivoxel analyses affect

*T*

_{2}distributions. Our simulations indicate that regularization causes...

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