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


Out-
      side
 



 
 'Gradient Field Echo' 
SEARCH FOR    
 
  2 3 5 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Result : Searchterm 'Gradient Field Echo' found in 2 terms [] and 2 definitions [], (+ 18 Boolean[] results
1 - 5 (of 22)     next
Result Pages : [1]  [2 3 4 5]
MRI Resources 
Calculation - MRI Technician and Technologist Schools - Diffusion Weighted Imaging - Coils - Implant and Prosthesis - MRCP
 
Gradient Field EchoInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
See Gradient Echo Sequence.
spacer
 
• Share the entry 'Gradient Field Echo':  Facebook  Twitter  LinkedIn  
 
Further Reading:
  News & More:
Principles, Techniques, and Applications of T2*- based MR Imaging and Its Special Applications1
September 2009   by pubs.rsna.org    
MRI Resources 
MRI Training Courses - Corporations - Shielding - MRI Accidents - Pathology - Journals
 
Gradient Field Echo with ContrastInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
(GFEC) A contrast enhanced gradient echo sequence.
See Contrast Enhanced Gradient Echo Sequence and Refocused Gradient Echo Sequence.
spacer

• View the DATABASE results for 'Gradient Field Echo with Contrast' (2).Open this link in a new window

MRI Resources 
RIS - Patient Information - DICOM - Coils - Most Wanted - Education
 
Refocused Gradient Echo SequenceInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
Refocused GRE sequences use a refocusing gradient in the phase encoding direction during the end module to maximize (refocus) remaining xy- (transverse) magnetization at the time when the next excitation is due, while the other two gradients are, in any case, balanced.
When the next excitation pulse is sent into the system with an opposed phase, it tilts the magnetization in the a direction. As a result the z-magnetization is again partly tilted into the xy-plane, while the remaining xy-magnetization is tilted partly into the z-direction.
Companies use different acronyms to describe certain techniques.
Different terms for these gradient echo pulse sequences:
R-GRE Refocused Gradient Echo,
FAST Fourier Acquired Steady State,
FFE Fast Field echo,
FISP Fast Imaging with Steady State Precession,
F-SHORT SHORT Repetition Technique Based on Free Induction Decay,
GFEC Gradient Field Echo with Contrast,
GRASS Gradient Recalled Acquisition in Steady State,
ROAST Resonant Offset Averaging in the Steady State,
SSFP Steady State Free Precession.
STERF Steady State Technique with Refocused FID
In this context, 'contrast' refers to the pulse sequence, it does not mean enhancement with a contrast agent.
spacer

• View the DATABASE results for 'Refocused Gradient Echo Sequence' (9).Open this link in a new window

MRI Resources 
Blood Flow Imaging - Journals - Spectroscopy pool - Bioinformatics - Case Studies - Knee MRI
 
Spoiled Gradient Echo SequenceInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
Spoiled gradient echo sequences use a spoiler gradient on the slice select axis during the end module to destroy any remaining transverse magnetization after the readout gradient, which is the case for short repetition times.
As a result, only z-magnetization remains during a subsequent excitation. This types of sequences use semi-random changes in the phase of radio frequency pulses to produce a spatially independent phase shift.
Companies use different acronyms to describe certain techniques.
Different terms for these gradient echo pulse sequences:
CE-FFE-T1 Contrast Enhanced Fast Field Echo with T1 Weighting,
GFE Gradient Field Echo,
FLASH Fast Low Angle Shot,
PS Partial Saturation,
RF spoiled FAST RF Spoiled Fourier Acquired Steady State Technique,
RSSARGE Radio Frequency Spoiled Steady State Acquisition Rewound Gradient Echo
S-GRE Spoiled Gradient Echo,
SHORT Short Repetition Techniques,
SPGR Spoiled Gradient Recalled (spoiled GRASS),
STAGE T1W T1 weighted Small Tip Angle Gradient Echo,
T1-FAST T1 weighted Fourier Acquired Steady State Technique,
T1-FFE T1 weighted Fast Field Echo.
In this context, 'contrast enhanced' refers to the pulse sequence, it does not mean enhancement with a contrast agent.
spacer

• View the DATABASE results for 'Spoiled Gradient Echo Sequence' (11).Open this link in a new window

 
Further Reading:
  News & More:
3-D VOLUMETRIC IMAGING FOR STEREOTACTIC LESIONAL AND DEEP BRAIN STIMULATION SURGERY
Cutting Edge Imaging of THE Spine
February 2007   by www.pubmedcentral.nih.gov    
MRI Resources 
Spectroscopy - MRI Reimbursement - Calculation - Services and Supplies - Process Analysis - Safety pool
 
Balanced Fast Field EchoInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
(bFFE) A FFE sequence using a balanced gradient waveform. A balanced sequence starts out with a RF pulse of 90° or less and the spins in the steady state. Before the next TR in the slice phase and frequency encoding, gradients are balanced so their net value is zero. Now the spins are prepared to accept the next RF pulse, and their corresponding signal can become part of the new transverse magnetization. Since the balanced gradients maintain the transverse and longitudinal magnetization, the result is, that both T1 and T2 contrast are represented in the image. This pulse sequence produces images with increased signal from fluid, along with retaining T1 weighted tissue contrast. Because this form of sequence is extremely dependent on field homogeneity, it is essential to run a shimming prior the acquisition. A fully balanced (refocused) sequence would yield higher signal, especially for tissues with long T2 relaxation times.
See Steady State Free Precession and Gradient Echo Sequence.

 
Images, Movies, Sliders:
 Cardiac Infarct Short Axis Cine bFFE 1  Open this link in a new window
    
 
spacer

• View the DATABASE results for 'Balanced Fast Field Echo' (3).Open this link in a new window

 
Further Reading:
  News & More:
T1rho-prepared balanced gradient echo for rapid 3D T1rho MRI
Monday, 1 September 2008   by www.ncbi.nlm.nih.gov    
Utility of the FIESTA Pulse Sequence in Body Oncologic Imaging: Review
June 2009   by www.ajronline.org    
MRI Resources 
Hospitals - Musculoskeletal and Joint MRI - Blood Flow Imaging - Examinations - Research Labs - Image Quality
 
     1 - 5 (of 22)     next
Result Pages : [1]  [2 3 4 5]
 Random Page
 
Share This Page
FacebookTwitterLinkedIn

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



The impact of TTIP/TPP on the MRI scanner market will bring :
more variety 
better scanners 
more risk 
less regulation 
cheaper scanners 
Lost in Translation 
no change at all 

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 • US-TIP • 
Copyright © 2003 - 2018 SoftWays. All rights reserved. [ 23 May 2019]
Terms of Use | Privacy Policy | Advertising
 [last update: 2018-03-08 05:11:00]