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. Author manuscript; available in PMC: 2009 Jun 26.
Published in final edited form as: J Cereb Blood Flow Metab. 2006 Feb;26(2):274–282. doi: 10.1038/sj.jcbfm.9600185

Figure 2.

Figure 2

Example of ROI data (symbols) and best fit to equation (1) (lines) for CASL difference signal (control image – labeled image) as a function of postlabeling delay in the normal rat brain. The peak height of the curves is proportional to CBF and the point of inflexion indicates the arterial transit time (δa).