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

Out-
      side
 



 
 'Phase Encoding' 
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 'Phase Encoding' found in 7 terms [] and 67 definitions []
previous     26 - 30 (of 74)     next
Result Pages : [1 2]  [3 4 5 6 7 8 9 10 11 12 13 14 15]
Searchterm 'Phase Encoding' was also found in the following service: 
spacer
Forum  (5)  
 
Simultaneous Acquisition of Spatial Harmonics
 
(SMASH) Several lines of data are acquired for each phase encoding step, which is also referred to as a k-space trajectory.
SMASH imaging with a four-element array coil is four times faster and can be used to achieve almost real-time imaging. The maximum reduction in acquisition time is determined by the number of array coil elements. Thus, the heart can be scanned with higher temporal resolution and increased spatial resolution.
SMASH and SENSE differ from other techniques in which only one line of k-space data is acquired for each phase encoding gradient step.

See Sensitivity encoding.
spacer
MRI Resources 
MR Guided Interventions - Hospitals - Pediatric and Fetal MRI - Spectroscopy - Shielding - Pathology
 
2 Dimensional Fourier Transformation Imaging
 
(2D FT) A form of sequential plane imaging using Fourier transformation imaging. In 2D FT, a line of data corresponds to the digitized NMR signal at a particular phase encoding level. The Fourier transformation process reconstructs the detected frequency and phase encoded image information (which are rotated 90° from each other) into a usable image.
spacer

• View the DATABASE results for '2 Dimensional Fourier Transformation Imaging' (2).Open this link in a new window

 
Further Reading:
  Basics:
Fourier Transform Imaging of Spin Vortex Eigenmodes
Friday, 13 August 2004   by www.physik.uni-regensburg.de    
MRI Resources 
Service and Support - Pregnancy - Developers - Used and Refurbished MRI Equipment - Pathology - Intraoperative MRI
 
3 Dimensional Acquisition
 
Scanning of a volume instead of scanning single slices. The phase encoding gradient is used for two directions.
spacer
 
Further Reading:
  Basics:
3-D VOLUMETRIC IMAGING FOR STEREOTACTIC LESIONAL AND DEEP BRAIN STIMULATION SURGERY
3D Software to Model the Whole Human Body
Thursday, 12 November 2009   by news.softpedia.com    
  News & More:
A 100-hour MRI scan captured the most detailed look yet at a whole human brain
Monday, 8 July 2019   by www.sciencenews.or    
First 3D MRI scans of unborn babies
Monday, 30 November 2009   by news.bbc.co.uk    
Scans show how HIV attacks brain
Tuesday, 11 October 2005   by news.bbc.co.uk    
Cutting Edge Imaging of THE Spine
February 2007   by www.pubmedcentral.nih.gov    
Searchterm 'Phase Encoding' was also found in the following service: 
spacer
Forum  (5)  
 
Acquisition Matrix
 
The total number of independent data samples in the frequency and phase directions (number of pixels in the frequency encoding - and phase encoding direction).
spacer

• View the DATABASE results for 'Acquisition Matrix' (12).Open this link in a new window

MRI Resources 
MR Guided Interventions - Implant and Prosthesis pool - Health - MRI Technician and Technologist Jobs - MRI Accidents - Pregnancy
 
Aliasing
 
If the receiving RF coil is sensitive to tissue signal arising from outside the desired FOV, this undesired signal may be incorrectly mapped to a location within the image, a phenomenon known as aliasing. This is a consequence of the acquired k-space frequencies not being sampled densely enough, whereby portions of the object outside of the desired FOV get mapped to an incorrect location inside the FOV. The sampling frequency should be at least twice the frequency being sampled. The maximum measurable frequency is therefore equal to half the sampling frequency. This is the so-called Nyquist limit. When the frequency is higher than the Nyquist limit, aliasing occurs.
A similar problem occurs in the phase encoding direction, where the phases of signal-bearing tissues outside of the FOV in the y-direction are a replication of the phases that are encoded within the FOV. This signal will be mapped, or wrapped back into the image at incorrect locations, and is seen as artifact.

See also Aliasing Artifact.
spacer

• View the DATABASE results for 'Aliasing' (19).Open this link in a new window

 
Further Reading:
  News & More:
The Effects of Breathing Motion on DCE-MRI Images: Phantom Studies Simulating Respiratory Motion to Compare CAIPIRINHA-VIBE, Radial-VIBE, and Conventional VIBE
Tuesday, 7 February 2017   by www.kjronline.org    
MRI Resources 
Artifacts - Brain MRI - Journals - Jobs pool - RIS - Software
 
previous      26 - 30 (of 74)     next
Result Pages : [1 2]  [3 4 5 6 7 8 9 10 11 12 13 14 15]
 Random Page
 
Share This Page
FacebookTwitterLinkedIn

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



How AI will impact MRI :
only diagnostics 
saving time 
reducing cost 
makes planning obsolete 
reduce human knowledge 
not 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 • Medical-Ultrasound-Imaging • 
Copyright © 2003 - 2024 SoftWays. All rights reserved. [ 28 March 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]