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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: NMR Biomed. 2013 Oct 16;27(2):116–128. doi: 10.1002/nbm.3040

Figure 1.

Figure 1

(a) The Arterial Input Function (AIF) for continuous ASL is characterized by the lengthening of ATT with the duration τ; (b) The Impulse Response Function (IRF) is compared between the proposed 3-parameter model (3p), which assumes a monoexponential decay function characterized with T1,eff, and the more sophisticated 4-parameter (4p) and 5-parameter models (5p) (Appendix); (c) The perfusion-weighted kinetic curves are the convolutions of AIF (a) with IRFs of the each model (b), respectively.