Magnetic Resonance - Technology Information Portal Welcome to MRI Technology•
Info
  Sheets

Out-
      side
 

MRI is trending to low field magnets :
reduced costs will lead to this change 
AI will close the gap to high field 
only in remote areas 
is only temporary 
never 
 
MRI Forum: fmri, block design: length o ...
SEARCH FORUM FOR   
Forum Overview

  Category:  Funktional MRI		 Reply to this thread
(login or register first)		What is - 'Forum Notification Service'?  
Rudolfo Marques

Fri. 19 Aug.11,
12:03
fmri, block design: length of "On" and "Off" periodes ?
Hello,
I'm planning some fmri research and I wonder why often the blocks of stimulation and nothing (or called base level or resting state) have the same length

If I let -maybe- a flickering checkerboard about 16 seconds on, as my "ON" period... then I should not need further 16 seconds resting state? DO I?

The BOLD-related effects should be away after about 2 seconds?

Thanks
Rudolfo
Related Threads
 • echo spacing
 • Dynamic data of MRI
 • Re: Calculation of Resolution and Tr
 • Contrast in GRE
 • Flip angle
 • usmarine2tim2
 • MIC 2005
 • Recommended Reading
 • SAR, Magnetic field and exitation frequency
 • fMRI frequency range
 • Muscle shading in 3T Images
 • MR750: ASSET Artifact or 32 Channel coil?
 • RF shimming
 • intracranial cavity volume
 • Regarding recovery and decay [basic phycisc]
 • breast MRI dataset
 • new job in MRI
 • How to fill the K-space?
 • why there is T2* but not T1*
 • Chronic insufficiency of the PCL is suspected.
Forum Overview

  Category:  Funktional MRI		 Reply to this thread
(login or register first)		What is - 'Forum Notification Service'?  
As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
- Albert Einstein
 
Share This Page
FacebookTwitterLinkedIn

MR-TIP    
Community   
User
Pass
Forgot your UserID/Password ?    



Look
      Ups




MR-TIP.com uses cookies! By browsing MR-TIP.com, you agree to our use of cookies.

Magnetic Resonance - Technology Information Portal
Member of SoftWays' Medical Imaging Group - MR-TIP • Radiology-TIP • Medical-Ultrasound-Imaging • 
Copyright © 2003 - 2024 SoftWays. All rights reserved. [ 27 April 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]