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. Author manuscript; available in PMC: 2009 Nov 1.

Published in final edited form as: Magn Reson Imaging Clin N Am. 2008 Nov;16(4):613–viii. doi: 10.1016/j.mric.2008.07.008

(A): Comparison of changes in R₂* in response to water load in 9 young and 9 elderly subjects. (B): Comparison of changes in R₂* in response to water load in 6 young subjects with and without cyclooxygenase inhibition with ibuprofen. Symbols are: () medulla; () cortex. Columns are mean ± SEM. NS implies not significant, * implies p<0.01, and # implies p<0.02‥ (From Prasad PV, Epstein FH. Changes in renal medullary pO₂ during water diuresis as evaluated by blood oxygenation level-dependent magnetic resonance imaging: effects of aging and cyclooxygenase inhibition. Kidney Int. 1999 Jan; 55(1):294-8; with permission.)

Inline graphic — (A): Comparison of changes in R₂* in response to water load in 9 young and 9 elderly subjects. (B): Comparison of changes in R₂* in response to water load in 6 young subjects with and without cyclooxygenase inhibition with ibuprofen. Symbols are: () medulla; () cortex. Columns are mean ± SEM. NS implies not significant, * implies p<0.01, and # implies p<0.02‥ (From Prasad PV, Epstein FH. Changes in renal medullary pO₂ during water diuresis as evaluated by blood oxygenation level-dependent magnetic resonance imaging: effects of aging and cyclooxygenase inhibition. Kidney Int. 1999 Jan; 55(1):294-8; with permission.)