Thank you Bruce! Good! So, at least it doesn't seem an impossible thing to achieve!! Best, Markus
2014-03-12 13:21 GMT+01:00 Bruce Fischl <fis...@nmr.mgh.harvard.edu>: > Hi Markus > > there is no way to know until you try it. There are many possible sources > of variance depending on e.g. how uniformly they are calibrated, but you > have to try and see. > > cheers > Bruce > > On Wed, 12 Mar 2014, Markus Gschwind wrote: > > Dear all, >> I am planning to create a "local cortical thickness normal template" in >> order to test single patients against it. >> >> For that purpose I was planning to use 50-100 MPRAGE scans of healthy >> subjects (balanced for age range and sex). >> >> My question is, if I should worry about the scanner where the data comes >> form. We have three Siemens Trios, the MPRAGES are more or less the same >> protocols. >> >> - when the created template with standart deviation map comes from all >> three >> scanners, can I test patients coming from all three scanners? Will it >> reduce >> sensitivity? >> >> - when the created template comes from only one scanner, it is clear that >> I >> will not be able to compare patients coming from another scanner against >> it. >> >> Thank you! >> >> Markus >> >> >> >> >> > > The information in this e-mail is intended only for the person to whom it > is > addressed. If you believe this e-mail was sent to you in error and the > e-mail > contains patient information, please contact the Partners Compliance > HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. >
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