Functional Magnetic Resonance Imaging in Acute Kidney Injury: Present Status

Figure 1

Representative mGRE images obtained from a healthy volunteer. (a) An mGRE image with long TE is used to place regions of interest (ROIs) on the medulla and cortex. Regions of cortex appear bright with high signal intensity, whereas medullary pyramids appear darker with a low signal intensity on the mGRE image. (b) The map is from the same slice position, which was scaled from 14 (red) to 150 (blue), representing a range of levels. Larger values correspond to higher levels of hypoxia. In this map, the medulla can be clearly distinguished from the cortex because the medulla has a higher value or a colder color in the map.

(a)

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