open-discussion > RE: SPECT
Apr 21, 2019  05:04 PM | Larry Olson - Emory University
RE: SPECT
I added the "alpha" command line tools For ISAS_HN to my Matlab script. This works really well.
-I specify the ictal and interictal files
-Reorient if needed
then they automatically:
-create the TMAP
-I do a linear registration to the T1 (since they are coregistered to the interictal at this stage now)
-Then I threshold the TMAP to intenisities >=2 and/or >=4 (sort of a arbitrary guess for now- see below)
-Then they overlay and display on the T1 or any file other in my pipeline. Outstanding.
No user input or supervision other than specifying the files.

The question I have for you is this:
If I remember correctly from BIS legacy, in the help menu there was a t-distribution "table" showing the critical points of the t-distribution interchangeably as T-values, Z-scores, or P-values. I am speculating here that there were 14 normal SPECT pairs, and to interchange them this would suggest df=13? Then a 2 tailed t-test p=0.001 would need T-values >=4.2, and p=0.01 would need T-values >=3.0, p=0.05 would need T-values >2.2?
Is this reasonable?

I would like to correct this point in my pipeline.
It adds an important additional analysis tool to the presurgical evaluations and makes it extremely easy for users.

Threaded View

TitleAuthorDate
Larry Olson Jan 26, 2019
Xenophon Papademetris Jan 28, 2019
Larry Olson Jan 29, 2019
Xenophon Papademetris Jan 29, 2019
Larry Olson Feb 15, 2019
Xenophon Papademetris Mar 20, 2019
Larry Olson Apr 2, 2019
Xenophon Papademetris Apr 5, 2019
RE: SPECT
Larry Olson Apr 21, 2019
Larry Olson Apr 5, 2019
Xenophon Papademetris Apr 5, 2019
Larry Olson Apr 17, 2019
Xenophon Papademetris Feb 18, 2019