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. Author manuscript; available in PMC: 2019 Feb 7.
Published in final edited form as: Magn Reson Med. 2014 Feb;71(2):486–505. doi: 10.1002/mrm.24729

FIG. 15.

FIG. 15.

Time sequence of tagged images in dog with emphysema in the right lung only (right side of each image) (adapted from Ref. 116). The images have a tagging wavelength of 3 cm and were acquired 0 to 4.1 s after tagging, in equal increments of 1.36 s. The images presented are all from the same slice, out of a total of 10 slices. The LRADC map at lower right is calculated from the decay rate of the fractional modulation on a pixel-by-pixel basis, and shows a substantial difference in LRADC between the two lungs. The fast diffusion is evident from the rapid disappearance of the modulation in the right lung. An ADC map of short-range diffusion is also shown for comparison; note the different scales for LRADC and ADC.