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- W2004705905 abstract "Dynamic magnetic resonance images of the kidney can be used to acquire separate renograms of the cortex and medulla. A high-quality cortical renogram can be determined directly from a region of interest (ROI) placed in the cortex. Due to partial volume effects, part of the signal from a ROI placed in the medulla is caused by cortical tissue. By subtracting a fraction of the cortical signal from the cortico-medullary signal, a purer medullary renogram can be obtained. A side effect of this subtraction is an increase in noise level. The noise level increases with larger partial volume fractions. Using a matched image filter, it is possible to exclude those areas from the ROI that have a high partial volume content, thus reducing the amount of cortical signal that has to be separated from the medullary signal. Noise reductions of up to 50% have been achieved in the medullary renogram, with an average reduction of 23%. J. Magn. Reson. Imaging 2000;11:149–155. © 2000 Wiley-Liss, Inc." @default.
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- W2004705905 date "2000-02-01" @default.
- W2004705905 modified "2023-10-16" @default.
- W2004705905 title "Reduction of noise in medullary renograms from dynamic MR images" @default.
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- W2004705905 doi "https://doi.org/10.1002/(sici)1522-2586(200002)11:2<149::aid-jmri11>3.0.co;2-3" @default.
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