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Question Posted 05/14/19:
Dear Experts. Disambiguation Request ~ re: "ASO" and "_ND". These two abbreviations appear in the field Series Description for many MRI acquisitions, but I cannot deduce their meaning/significance. Are ASO scans "accelerated"? Are "_ND" scans scaled or is something "Not Done"? Any help here would be appreciated.
Response posted 05/20/19 by ADNI MRI:
Thanks for your question to the ADNI MRI Core.

The ASO suffix refers to some ADNI1 scans where the site was asked to turn Auto Shim On (ASO) as it was mistakenly left off.

The _ND suffix is a automated output from some Siemens scanners when distortion correction is applied. The ND stands for No Distortion correction, so they system provides the distortion corrected images and the non corrected images.


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