Search Results - "Steen, R G"

Measuring Brain Volume by MR Imaging: Impact of Measurement Precision and Natural Variation on Sample Size Requirements by Steen, R.G, Hamer, R.M, Lieberman, J.A

“…To determine the sample size needed to provide adequate statistical power in studies of brain volume by MR imaging, we examined the precision and variability…”
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Systematic Differences between Lean and Obese Adolescents in Brain Spin-Lattice Relaxation Time: A Quantitative Study by CAZETTES, F, TSUI, W. H, JOHNSON, G, STEEN, R. G, CONVIT, A

“…Emerging evidence suggests that obese adolescents show changes in brain structure compared with lean adolescents. In addition, obesity impacts body development…”
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Phenotype of mice lacking functional Deleted in colorectal cancer (Dec) gene by Fazeli, Amin, Dickinson, Stephanie L, Hermiston, Michelle L, Tighe, Robert V, Steen, Robert G, Small, Clayton G, Stoeckli, Esther T, Keino-Masu, Kazuko, Masu, Masayuki, Rayburn, Helen, Simons, Jonathan, Bronson, Roderick T, Gordon, Jeffrey I, Tessier-Lavigne, Marc, Weinberg, Robert A

“…The DCC (Deleted in colorectal cancer) gene was first identified as a candidate for a tumour-suppressor gene on human chromosome 18q. More recently, in vitro…”
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The correlation between phase shifts in gradient-echo MR images and regional brain iron concentration by Ogg, Robert J., Langston, James W., Haacke, E.Mark, Steen, R.Grant, Taylor, June S.

“…The purpose of this study was to investigate the relationship between the magnetic susceptibility of brain tissue and iron concentration. Phase shifts in…”
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A Genetic Linkage Map of the Mouse: Current Applications and Future Prospects by Copeland, Neal G., Jenkins, Nancy A., Gilbert, Debra J., Eppig, Janan T., Maltais, Lois J., Miller, Joyce C., Dietrich, William F., Weaver, Alix, Lincoln, Stephen E., Steen, Robert G., Stein, Lincoln D., Nadeau, Joseph H., Lander, Eric S.

“…Technological advances have made possible the development of high-resolution genetic linkage maps for the mouse. These maps in turn offer exciting prospects…”
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Genetic Mapping of a Murine Locus Controlling Development of T Helper 1/T Helper 2 Type Responses by Gorham, James D., Guler, Mehmet L., Steen, Robert G., Mackey, Aaron J., Daly, Mark J., Frederick, Kathy, Dietrich, William F., Murphy, Kenneth M.

“…Genetic background of the T cell can influence T helper (Th) phenotype development, with some murine strains (e.g., B10.D2) favoring Th1 development and others…”
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Radiation hybrid map of the mouse genome by Lander, Eric S, Hudson, Thomas J, Van Etten, William J, Steen, Robert G, Nguyen, Huy, Castle, Andrew B, Slonim, Donna K, Ge, Bing, Nusbaum, Chad, Schuler, Greg D

“…Radiation hybrid (RH) maps are a useful tool for genome analysis, providing a direct method for localizing genes and anchoring physical maps and genomic…”
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Age-related changes in the pediatric brain: quantitative MR evidence of maturational changes during adolescence by Steen, RG, Ogg, RJ, Reddick, WE, Kingsley, PB

“…To determine whether a quantitative MR imaging method to map spin-lattice relaxation time (T1) can be used to characterize maturational changes in the normal…”
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Subtle brain abnormalities in children with sickle cell disease: Relationship to blood hematocrit by Steen, R. Grant, Xiong, Xioping, Mulhern, Raymond K., Langston, James W., Wang, Winfred C.

“…Our objective was to test a hypothesis that subtle brain abnormality can be present in pediatric sickle cell disease (SCD) patients who are clinically free of…”
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Abnormalities of the central nervous system in very young children with sickle cell anemia by Wang, Winfred C., Langston, James W., Steen, R.Grant, Wynn, Lynn W., Mulhern, Raymond K., Wilimas, Judith A., Kim, Francine M., Figueroa, Ramon E.

“…Objective: To determine whether abnormalities of the CNS are present in very young children with sickle cell anemia. Study design: Thirty-nine children with…”
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When Is A Bone Fracture No Longer “Fresh”? by Scott, RA, Jones, J, Steen, RG

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Age-related changes in brain T1 are correlated with iron concentration by Ogg, R J, Steen, R G

“…Age-related changes in brain T1 from 115 healthy subjects (range, 4.5-71.9 yr) were analyzed in relation to published regional brain iron concentration in…”
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Genetic susceptibility to Leishmania : IL-12 responsiveness in TH1 cell development by GÜLER, M. L, GORHAM, J. D, HSIEH, C.-S, MACKEY, A. J, STEEN, R. G, DIETRICH, W. F, MURPHY, K. M

“…The genetic background of T lymphocytes influences development of the T helper (TH) phenotype, resulting in either resistance or susceptibility of certain…”
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Evidence for facultative heterotrophy in cultured zooxanthellae by STEEN, R. G

“…Using zooxanthellae (Symbiodinium sp.) isolated from the tropical sea anemone Aiptasia pulchella collected from Kaneohe Bay, Hawaii, the effect of various…”
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A genetic map of the mouse with 4,006 simple sequence length polymorphisms by Nahf, Robert, Page, David C, Merchant, Mark, Stein, Lincoln D, Miller, Joyce C, Marquis, Andre, Gross, Alec, Lander, Eric S, Dietrich, William F, Dredge, Robert D, Wessel, Michael, Steen, Robert G, Damron, Deborah, Joyce, Diane C, Goodman, Nathan

“…We have constructed a genetic map of the mouse genome containing 4,006 simple sequence length polymorphisms (SSLPs). The map provides an average spacing of…”
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Establishing norms for age-related changes in proton T1 of human brain tissue in vivo by Cho, Seong, Jones, Dana, Reddick, Wilburn E., Ogg, Robert J., Steen, R.Grant

“…The goal of this study was to determine the expected normal range of variation in spin-lattice relaxation time ( T 1) of brain tissue in vivo, as a function of…”
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Correction of errors caused by imperfect inversion pulses in MR imaging measurement of T1 relaxation times by Kingsley, Peter B., Ogg, Robert J., Reddick, Wilburn E., Steen, R.Grant

“…Spin-lattice ( T 1) relaxation times were measured by an inversion-recovery magnetic resonance imaging method with a slice-selective inversion pulse (SIP), a…”
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More than meets the eye: significant regional heterogeneity in human cortical T1 by Steen, R.Grant, Reddick, Wilburn E, Ogg, Robert J

“…Segmented k-space acquisition of data was used to decrease the acquisition time and to increase the imaging resolution of the precise and accurate inversion…”
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Characterization of tumor hypoxia by 31P MR spectroscopy by Steen, RG

“…Tumor hypoxia is of considerable importance to the oncologist in selecting and optimizing cancer therapy, because hypoxia can determine the effectiveness of…”
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Rapid fluorescence quantitation of plasmid miniprep DNA by Steen, R G, MacDonald, C G, Weaver, A L, Pitt, A M

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