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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Magn Reson Med. 2015 Jun 16;75(5):1967–1977. doi: 10.1002/mrm.25793

Figure 4.

Figure 4

The effect of sampling rate on K-CNR for the Patlak model depends on the effect adjusting the sampling interval has on the SNR of the scan, two different scenarios are considered. A) Lengthened sampling interval increases the SNR, as would happen by adding averages or increasing the matrix size and field of view together. Only small differences are seen between sampling intervals shorter than 60 seconds, while sampling intervals longer than 60 seconds lead to significant K-CNR loss. B) Changing the sampling interval has no effect on SNR (SNR is held constant), as would happen by adding or removing slices in a 2D scan. In this case longer sampling intervals lead to a consistent and significant decrease in the K-CNR.