Search Results - "Pipe, J G"

Motion correction with PROPELLER MRI: Application to head motion and free-breathing cardiac imaging by Pipe, James G.

“…A method for motion correction, involving both data collection and reconstruction, is presented. The PROPELLER MRI method collects data in concentric…”
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Sampling density compensation in MRI: Rationale and an iterative numerical solution by Pipe, James G., Menon, Padmanabhan

“…Data collection of MRI which is sampled nonuniformly in k‐space is often interpolated onto a Cartesian grid for fast reconstruction. The collected data must be…”
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Reconstructing MR images from undersampled data: Data-weighting considerations by Pipe, James G.

“…Data which are sampled more densely than the Nyquist limit in k‐space are weighted prior to reconstruction by the inverse of the local sampling density. This…”
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In vivo MR determination of water diffusion coefficients and diffusion anisotropy: correlation with structural alteration in gliomas of the cerebral hemispheres [published erratum appears in AJNR Am J Neuroradiol 1995 Jun-Jul;16(6):1384] by Brunberg, JA, Chenevert, TL, McKeever, PE, Ross, DA, Junck, LR, Muraszko, KM, Dauser, R, Pipe, JG, Betley, AT

“…To determine whether a relationship exists between water diffusion coefficients or diffusion anisotropy and MR-defined regions of normal or abnormal brain…”
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Pulse waveform analysis of arterial compliance: relation to other techniques, age, and metabolic variables by Resnick, Lawrence M, Militianu, Daniela, Cunnings, Amy J, Pipe, James G, Evelhoch, Jeffrey L, Soulen, Renata L, Lester, Melvin A

“…T o assess the physiologic and clinical relevance of newer noninvasive measures of vascular compliance, computerized arterial pulse waveform analysis (CAPWA)…”
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Evidence for Cytotoxic Edema in the Pathogenesis of Cerebral Venous Infarction by Forbes, Kirsten P.N, Pipe, James G, Heiserman, Joseph E

“…The pathogenesis of cerebral venous infarction (CVI) remains controversial, with uncertainty over whether cytotoxic edema plays a role. Recent animal studies…”
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A Spiral Spin-Echo MR Imaging Technique for Improved Flow Artifact Suppression in T1-Weighted Postcontrast Brain Imaging: A Comparison with Cartesian Turbo Spin-Echo by Li, Z, Hu, H H, Miller, J H, Karis, J P, Cornejo, P, Wang, D, Pipe, J G

“…A challenge with the T1-weighted postcontrast Cartesian spin-echo and turbo spin-echo brain MR imaging is the presence of flow artifacts. Our aim was to…”
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Neonatal Hypoxic-ischemic Encephalopathy: Detection with Diffusion-weighted MR Imaging by Forbes, Kirsten P. N, Pipe, James G, Bird, Roger

“…Although diffusion-weighted imaging has been shown to be highly sensitive in detecting acute cerebral infarction in adults, its use in detecting neonatal…”
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Direct Magnetic Resonance Determination of Aortic Distensibility in Essential Hypertension: Relation to Age, Abdominal Visceral Fat, and In Situ Intracellular Free Magnesium by Resnick, Lawrence M, Militianu, Daniela, Cunnings, Amy J, Pipe, James G, Evelhoch, Jeffrey L, Soulen, Renate L

“…To investigate the contribution of vascular compliance to essential hypertension (EH), we developed magnetic resonance imaging (MRI) techniques to directly…”
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Spiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical Evaluation by Ooi, M B, Li, Z, Robison, R K, Wang, D, Anderson, 3rd, A G, Zwart, N R, Bakhru, A, Nagaraj, S, Mathews, T, Hey, S, Koonen, J J, Dimitrov, I E, Friel, H T, Lu, Q, Obara, M, Saha, I, Wang, H, Wang, Y, Zhao, Y, Temkit, M, Hu, H H, Chenevert, T L, Togao, O, Tkach, J A, Nagaraj, U D, Pinho, M C, Gupta, R K, Small, J E, Kunst, M M, Karis, J P, Andre, J B, Miller, J H, Pinter, N K, Pipe, J G

“…Spiral MR imaging has several advantages compared with Cartesian MR imaging that can be leveraged for added clinical value. A multicenter multireader study was…”
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An optimized center-out k-space trajectory for multishot MRI: Comparison with spiral and projection reconstruction by Pipe, James G.

“…A method for collecting MRI data on a set of rotated trajectories that begin at the center of k‐space is outlined. It is theoretically slightly faster,…”
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Diffusion-weighted imaging provides support for secondary neuronal damage from intraparenchymal hematoma by FORBES, K. P, PIPE, J. G, HEISERMAN, J. E

“…It is controversial whether an intracerebral hematoma (ICH) causes ischemia of surrounding brain. By virtue of its high sensitivity to acute cerebral…”
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Spatial encoding and reconstruction in MRI with quadratic phase profiles by Pipe, J G

“…Application of a slice-selective frequency modulated radiofrequency excitation pulse in a magnetic resonance (MR) imaging experiment creates a quadratic phase…”
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Analysis of localized quadratic encoding and reconstruction by Pipe, J G

“…Localized quadratic (LQ) encoding is a method of collecting multislice MRI data sets with greatly overlapping excited slices in such a way that the slice…”
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Magnetic-resonance imaging techniques for detection of elasticity variation by Fowlkes, J B, Emelianov, S Y, Pipe, J G, Skovoroda, A R, Carson, P L, Adler, R S, Sarvazyan, A P

“…The relative success of manual palpation in the detection of breast cancer would suggest that a method for remote palpation resulting in a measurement of…”
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Effects of interleaf order for spiral MRI of dynamic processes by Pipe, James G., Ahunbay, Ergun, Menon, Padmanabhan

“…The effects of the temporal order in which spiral interleaves are collected are discussed, in the context of artifacts from moving or changing objects…”
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Flow effects in localized quadratic, partial Fourier MRA by Pipe, James G.

“…A pulse sequence for inflow‐enhanced magnetic resonance angiography, including localized quadratic encoding, partial‐Fourier slice selection, and spiral…”
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Analytical resolution and noise characteristics of linearly reconstructed magnetic resonance data with arbitrary k-space sampling by Pipe, J G, Duerk, J L

“…The effects of time-varying readout gradients and data sampling with variable dwell times in magnetic resonance imaging are examined. General reconstruction…”
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Anisotropic diffusion in human white matter: demonstration with MR techniques in vivo by Chenevert, T L, Brunberg, J A, Pipe, J G

“…Quantitative measurements of perfusion and molecular diffusion were made in human white matter in two orientations of the motion-sensitization gradient to…”
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PROPELLER MRI: Clinical testing of a novel technique for quantification and compensation of head motion by Forbes, Kirsten P.N., Pipe, James G., Bird, C. Roger, Heiserman, Joseph E.

“…While head motion is considered a significant problem in magnetic resonance imaging (MRI), there is no data to quantify its extent, severity, or effect on…”
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