Search Results - "Ortendahl, D A"

Measuring signal-to-noise ratios in MR imaging by Kaufman, L, Kramer, D M, Crooks, L E, Ortendahl, D A

“…The signal-to-noise ratio (S/N) in magnetic resonance imagining is one of the variables that must be measured when comparing the relative performance of…”
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Magnetic resonance imaging of the TMJ disc in asymptomatic volunteers by Kircos, L T, Ortendahl, D A, Mark, A S, Arakawa, M

“…Forty-two temporomandibular joints (TMJs) in 21 asymptomatic volunteers were visualized by magnetic resonance imaging (MRI). The subjects, 12 males and nine…”
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Partial flip angle MR imaging by Mills, T C, Ortendahl, D A, Hylton, N M, Crooks, L E, Carlson, J W, Kaufman, L

“…Theoretical analysis predicts that performing magnetic resonance (MR) imaging with partial (less than 90 degrees) flip angles can reduce imaging times two- to…”
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Characteristics of partial flip angle and gradient reversal MR imaging by Winkler, M L, Ortendahl, D A, Mills, T C, Crooks, L E, Sheldon, P E, Kaufman, L, Kramer, D M

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Analytical tools for magnetic resonance imaging by Ortendahl, D A, Hylton, N, Kaufman, L, Watts, J C, Crooks, L E, Mills, C M, Stark, D D

“…The response of different magnetic resonance (MR) techniques to tissue parameters - T1, T2, and N(H) - is a determinant of clinical efficacy. The large…”
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Clinical efficiency of nuclear magnetic resonance imaging by Crooks, L E, Ortendahl, D A, Kaufman, L, Hoenninger, J, Arakawa, M, Watts, J, Cannon, C R, Brant-Zawadzki, M, Davis, P L, Margulis, A R

“…Advances in imaging technique have improved the efficiency of clinical nuclear magnetic resonance (NMR) imaging, and will allow total patient examination time…”
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Analysis of hybrid imaging techniques by Ortendahl, D A, Kaufman, L, Kramer, D M

“…Hybrid imaging techniques have been proposed as a means of decreasing imaging time without the cost and technical constraints of echo planar imaging. With this…”
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Whole-body MR imaging and spectroscopy at 4 T: where do we go from here? by Ortendahl, D A

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Nuclear magnetic resonance imaging of the infarcted muscle: a rat model by Herfkens, R J, Sievers, R, Kaufman, L, Sheldon, P E, Ortendahl, D A, Lipton, M J, Crooks, L E, Higgins, C B

“…Eleven Sprague-Dawley rats with experimentally produced infarction of the lower extremities were imaged by nuclear magnetic resonance (NMR) immediately after…”
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Noise and texture characteristics of selective averaging by Ortendahl, D.A.

“…Selective averaging, where different lines in k-space are accumulated with a different number of acquisitions has previously been shown to introduce texture…”
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MRI of blood flow: correlation of image appearance with spin-echo phase shift and signal intensity by Valk, PE, Hale, JD, Crooks, LE, Kaufman, L, Roos, MS, Ortendahl, DA, Higgins, CB

“…Phase-sensitive imaging was used to correlate signal distribution with phase shift and velocity distribution in spin-echo magnetic resonance imaging (MRI)…”
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Characterization of MR spectroscopic imaging of the human head and limb at 2.0 T by Tropp, J S, Sugiura, S, Derby, K A, Suzuki, Y, Hawryszko, C, Yamagata, H, Klein, J E, Ortendahl, D A, Kaufman, L, Acosta, G F

“…Using section-select and phase-encoding gradients, the authors obtained phosphorus chemical shift images of the human head and limb. Phosphorus spectra were…”
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Multiple spin-echo magnetic resonance imaging by Feinberg, D A, Mills, C M, Posin, J P, Ortendahl, D A, Hylton, N M, Crooks, L E, Watts, J C, Kaufman, L, Arakawa, M, Hoenninger, J C

“…Spin-echo magnetic resonance (MR) imaging detects a variety of pathologic states with great sensitivity. A technique for producing multiple spin-echo images in…”
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NMR in experimental cerebral edema: value of T1 and T2 calculations by Brant-Zawadzki, M, Bartkowski, HM, Ortendahl, DA, Pitts, LH, Hylton, NM, Nishimura, MC, Crooks, LE

“…In an experimental investigation, the efficacy of nuclear magnetic resonance (NMR) relaxation times in measuring brain water was studied. Cerebral edema was…”
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Fluoroscopic MR imaging at 0.064 Tesla by Kramer, D.M., Hawryszko, C., Ortendahl, D.A., Minaise, M.

“…The authors developed a system for ultrafast magnetic resonance imaging (MRI) protocols at low field. The system design permits the acquisition of the raw data…”
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Variable magnetic resonance imaging parameters: effect on detection and characterization of lesions by Posin, J P, Ortendahl, D A, Hylton, N M, Kaufman, L, Watts, J C, Crooks, L E, Mills, C M

“…With change in the imaging technique and magnetic field strength used in magnetic resonance imaging, wide variations in the delineation of pathologic features…”
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Real-time interactions in MRI by Ortendahl, Douglas A., Kaufman, Leon

“…With the advent of magnetic resonance fluoroscopic imaging, it is possible to obtain images at a rate which can be considered effectively real-time. Image…”
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Optimal visualization of cerebrospinal fluid on MRI by ORTENDAHL, D. A, POSIN, J. P, HYLTON, N. M, MILLS, C. M

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The utility of principal component analysis for the image display of brain lesions. A preliminary, comparative study by Schmiedl, U, Ortendahl, D A, Mark, A S, Berry, I, Kaufman, L

“…Principal component analysis (PCA), a common tool from multivariate statistical analysis, has been implemented into the computer display system of a MR imaging…”
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Directions in magnetic resonance imaging technology by Ortendahl, D A, Crooks, L E

“…Over the past few years there have been substantial improvements in the performance of magnetic resonance (MR) imagers. As image quality improved it became…”
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