Talk:Contrast resolution

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I'm not sure it's appropriate to state with such authority that the equation presented here is correct "by definition" for MRI. There are several definitions of CNR used in MRI (another being CNR=SNRa-SNRb). See for example http://www.phys.cwru.edu/courses/p431/notes-2003/node123.html — Preceding unsigned comment added by 129.137.218.82 (talk • contribs) 14 November 2008 (UTC)