Question

Question Posted 07/06/16:
Is there a way to know the point spread function of different scanners participating in ADNI PET data?
Response posted 07/06/16 by Robert Koeppe:
I would hesitate to give a number for the point-spread function for each of the scanners. The PSF will be dependent on the reconstruction used, so it would be more of an effective PSF. What I could provide is either or both of the following:
1. The effective resolution of each scan given the reconstruction parameters used at that site.
2. The amount of smoothing we apply to the scans to achieve an effective resolution of 8 mm FWHM.
If you would e-mail me (koeppe@umich.edu) with more details with what you are wanting to do with the PSF, I may be able to be more helpful.
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Due to serious data quality concerns, all data with PTIDs containing the format 381_S_10### have been removed from the ADNI data repository. ADNI leadership strongly advises that data with these PTIDs not be used in any data analysis, submission of abstracts, or publications. Furthermore, ADNI leadership requests that any abstracts or papers which have been submitted using this data be appropriately revised due to concerns with data quality. More information click here.

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