Inclusion of internal zScore into output reports

[mharms]

Hi, This isn't an "issue" per se. I thought it would potentially be very useful if the QCReport output included the z-scores that are calculated internally as part of SliceChecker and InterlaceChecker for deciding if a frame should be excluded. That way, one can quickly see how close a given frame was to exclusion, and more readily calibrate an appropriate set of thresholds to use for a given set of data.

So, I've implemented the changes necessary in the SliceChecker and InterlaceChecker code to store those z-scores while they are computed, and then later output them into the QCReport.

I'm not familiar with how to formally use GitHub for this sort of thing, so I haven't forked the code and created a pull request. But I'm mentioning this because if a DTIPrep developer is interested in incorporating these features, I'm more than happy to share the code.

cheers, -Mike H.