Skip to content

Commit

Permalink
Update ASL_Techniques.rst
Browse files Browse the repository at this point in the history
  • Loading branch information
andrewjahn committed Apr 2, 2019
1 parent d2a2d11 commit 636a2d2
Showing 1 changed file with 6 additions and 0 deletions.
6 changes: 6 additions & 0 deletions docs/ASL/ASL_Techniques.rst
Original file line number Diff line number Diff line change
Expand Up @@ -41,3 +41,9 @@ How do the results obtained from ASL experiments differ from those obtained with
The top row shows 2-coil CASL images and the bottom one shows BOLD images. We used the same TR (4 seconds) and spiral acquisition in both ASL and BOLD. The left column of images were averaged over 4 minutes of rest. The middle column of images were averaged over four minutes of finger tapping. The right column is simply the difference of the other two columns - No modeling, filtering, regressing, or anything. Just subtraction.

As you can see, ASL images are intrinsically a lot noisier, in fact, they look awful, you can barely see the white mater... but the change in ASL signal that results from activation is huge (we observe 50%, or even more).


Next Steps
---------

Now that you've become familiar with different approaches to ASL analysis, click on the Next button to learn how to download ASL software and a sample dataset to analyze.

0 comments on commit 636a2d2

Please sign in to comment.