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

Out-
      side
 

Next big thing in MRI will be :
AI 
remote operator 
personalized protocols 
helium-free 
molecular MRI 
portable MRI 
 
MRI Forum: Gradient modes
SEARCH FORUM FOR   
Forum Overview

  Category:  Applications and Examinations		 Reply to this thread
(login or register first)		What is - 'Forum Notification Service'?  
Angela Hoskinson

Thu. 22 Jan.09,
03:19
Gradient modes
Does changing the gradient mode from "fast" to "whisper" have an effect on the image quality? I just did a PD FS on a knee and compared two sequences that were exactly the same except for one was "fast" and the other was "whisper", which also changed the TR and TE very slightly (TR from 1970 - 2100 and TE from 29 - 31). The whisper sequence was noticeably lower quality and I can't figure out why.
Sue Wong

Wed. 28 Jan.09,
20:03
 You pay for the noise reduction; the parameter 'whisper' reduces the gradient performance. Db/dt (and the noise of the scanner is depended on db/dt) is directly proportional to the gradient performance (slew rate).
Related Threads
 • MRI Pulse Sequence Design
 • ZIP512
 • MRI Registry
 • hi
 • T1 & T2 map vs T1W & T2W
 • Hear MRI
 • MRI Applications!
 • Building 3d Volumes from MRI DICOM
 • MR assesment liver iron
 • Shoulder orientation
 • Neuro vascular array does not perform DWI
 • how to fill holes and gaps in rough sensitivity map?
 • What is THIS ?
 • Muscle shading in 3T Images
 • Dynamic Imaging
 • diffusion MRi
 • Protocol Exchange
 • How to fill the K-space?
 • angio
 • Second contrast dosage on COW MRA
Forum Overview

  Category:  Applications and Examinations		 Reply to this thread
(login or register first)		What is - 'Forum Notification Service'?  
Remember not only to say the right thing in the right place, but far more difficult still, to leave unsaid the wrong thing at the tempting moment.
- Benjamin Franklin
 
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. [ 18 April 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]