Duke-UNC Brain Imaging and Analysis Center
BIAC Forums | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Support Forums
 Scanner Support
 inverse spiral versus standard spiral

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

 
Check here to subscribe to this topic.
   

T O P I C    R E V I E W
weissman Posted - Jul 09 2003 : 7:24:08 PM
Dear BIAC Forumers,

Does anyone know whether the inverse spiral sequence is more or less "noisy" than the standard spiral sequence on the 1.5T? That is, whether the inverse spiral images contain more artifact than the standard spiral images?

The reason I ask is that in a less than scientific comparison of time courses from two different studies (involving about 15 subjects per study), the time courses generated using the inverse spiral sequence look worse on average. More quantitatively, the across-subject standard deviation of the BOLD response at each time point of an estimated hemodynamic response is usually higher for the inverse than for the standard spiral sequence.

If anyone has any input on this issue, it would be much appreciated!

Thanks,
Daniel

BIAC Forums © 2000-2010 Brain Imaging and Analysis Center Go To Top Of Page
This page was generated in 0.34 seconds. Snitz Forums 2000