Search Results - "Fielden, Samuel W"

The effects of the skull on CT imaging of the brain: a skull and brain phantom study by Cauley, Keith A, Yorks, Patrick J, Flora, Sarah, Fielden, Samuel W

“…To investigate the effects of beam hardening by the skull on the measured radiodensity of the brain. To test a hypothesis that these effects of beam hardening…”
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Automated Segmentation of Head Computed Tomography Images Using FSL by Cauley, Keith A, Och, Joe, Yorks, Patrick J, Fielden, Samuel W

“…The aim of this study was to investigate the use of one magnetic resonance image-processing tool, FSL, in its ability to perform automated segmentation of…”
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Automated Estimation of Acute Infarct Volume from Noncontrast Head CT Using Image Intensity Inhomogeneity Correction by Cauley, Keith A., Fielden, Samuel W., Mongelluzzo, Gino J.

“…Identification of early ischemic changes (EIC) on noncontrast head CT scans performed within the first few hours of stroke onset may have important…”
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Editorial for “T1, T2, and Fat Fraction Cardiac Magnetic Resonance Fingerprinting: Preliminary Clinical Evaluation” by Fielden, Samuel W.

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AAPM Task Group Report 325: MRI static magnetic field homogeneity measurement and evaluation procedures – Guidance and resources by Brunnquell, Christina L, Andrews, Trevor J, Fielden, Samuel W, Huff, Kathryn, Jordan, David W, O'Shea, Michael T, Ragan, Dustin K, Tressler, Michael A, Salzillo, Travis C, Och, Joseph

“…Measurement of static magnetic field (B0) homogeneity is an essential component of routine MRI system evaluation. This report summarizes the work of AAPM Task…”
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Rapid 3D dynamic arterial spin labeling with a sparse model-based image reconstruction by Zhao, Li, Fielden, Samuel W., Feng, Xue, Wintermark, Max, Mugler, John P., Meyer, Craig H.

“…Dynamic arterial spin labeling (ASL) MRI measures the perfusion bolus at multiple observation times and yields accurate estimates of cerebral blood flow in the…”
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Correcting image blur in spiral, retraced in/out (RIO) acquisitions using a maximized energy objective by Allen, Steven P., Feng, Xue, Fielden, Samuel W., Meyer, Craig H.

“…Purpose Images acquired with spiral k‐space trajectories can suffer from off‐resonance image blur. Previous work showed that averaging 2 images acquired with a…”
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A simple acquisition strategy to avoid off-resonance blurring in spiral imaging with redundant spiral-in/out k-space trajectories by Fielden, Samuel W., Meyer, Craig H.

“…Purpose The major hurdle to widespread adoption of spiral trajectories has been their poor off‐resonance performance. Here we present a self‐correcting spiral…”
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A spiral‐based volumetric acquisition for MR temperature imaging by Fielden, Samuel W., Feng, Xue, Zhao, Li, Miller, G. Wilson, Geeslin, Matthew, Dallapiazza, Robert F., Elias, W. Jeffrey, Wintermark, Max, Butts Pauly, Kim, Meyer, Craig H.

“…Purpose To develop a rapid pulse sequence for volumetric MR thermometry. Methods Simulations were carried out to assess temperature deviation, focal spot…”
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3D-Encoded DENSE MRI with Zonal Excitation for Quantifying Biventricular Myocardial Strain During a Breath-Hold by Carruth, Eric D., Fielden, Samuel W., Nevius, Christopher D., Fornwalt, Brandon K., Haggerty, Christopher M.

“…Purpose Right ventricular (RV) function is increasingly recognized for its prognostic value in many disease states. As with the left ventricle (LV),…”
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A Radiodensity Histogram Study of the Brain in Multiple Sclerosis by Cauley, Keith A, Fielden, Samuel W

“…Multiple sclerosis (MS) is a progressive neurodegenerative disease, affecting 1 million Americans and 2.5 million people globally. Although the diagnosis is…”
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Typical readout durations in spiral cine DENSE yield blurred images and underestimate cardiac strains at both 3.0 T and 1.5 T by Wehner, Gregory J., Suever, Jonathan D., Fielden, Samuel W., Powell, David K., Hamlet, Sean M., Vandsburger, Moriel H., Haggerty, Christopher M., Zhong, Xiaodong, Fornwalt, Brandon K.

“…Displacement encoding with stimulated echoes (DENSE) is a phase contrast technique that encodes tissue displacement into phase images, which are typically…”
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A new method for the determination of aortic pulse wave velocity using cross-correlation on 2D PCMR velocity data by Fielden, Samuel W., Fornwalt, Brandon K., Jerosch-Herold, Michael, Eisner, Robert L., Stillman, Arthur E., Oshinski, John N.

“…Purpose To evaluate the reproducibility of a new multisite axial pulse wave velocity (PWV) measurement technique that makes use of 2D PCMR data and…”
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Noncontrast peripheral MRA with spiral echo train imaging by Fielden, Samuel W., Mugler III, John P., Hagspiel, Klaus D., Norton, Patrick T., Kramer, Christopher M., Meyer, Craig H.

“…Purpose To develop a spin echo train sequence with spiral readout gradients with improved artery–vein contrast for noncontrast angiography. Theory Venous T2…”
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Spatially-segmented undersampled MRI temperature reconstruction for transcranial MR-guided focused ultrasound by Gaur, Pooja, Werner, Beat, Feng, Xue, Fielden, Samuel W, Meyer, Craig H, Grissom, William A

“…Volumetric thermometry with fine spatiotemporal resolution is desirable to monitor MR-guided focused ultrasound (MRgFUS) procedures in the brain, but requires…”
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Refocused turbo spin-echo for noncontrast peripheral MR angiography by Fielden, Samuel W., Mugler III, John P., Hagspiel, Klaus D., Norton, Patrick T., Kramer, Christopher M., Meyer, Craig H.

“…Purpose To develop and assess a three‐dimensional refocused turbo spin‐echo (rTSE) sequence for generating peripheral angiograms. This sequence combines the…”
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Spatially-segmented undersampled MRI temperature reconstruction for transcranial MR-guided focused ultrasound by Gaur, Pooja, Werner, Beat, Feng, Xue, Fielden, Samuel W., Meyer, Craig H., Grissom, William A.

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Noncontrast peripheral MRA with spiral echo train imaging: Spiral TSE for Noncontrast MRA by Fielden, Samuel W., Mugler, John P., Hagspiel, Klaus D., Norton, Patrick T., Kramer, Christopher M., Meyer, Craig H.

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Refocused turbo spin-echo for noncontrast peripheral MR angiography: Refocused TSE for Noncontrast MRA by Fielden, Samuel W., Mugler, John P., Hagspiel, Klaus D., Norton, Patrick T., Kramer, Christopher M., Meyer, Craig H.

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Refocused turbo spin echo for non-contrast peripheral magnetic resonance angiography by Fielden, Samuel W., Mugler, John P., Hagspiel, Klaus D., Norton, Patrick T., Kramer, Christopher M., Meyer, Craig H.

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