English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  The influence of flow and motion in MRI of diffusion using a modified CE-FAST sequence.

Merboldt, K. D., Hänicke, W., Gyngell, M., Frahm, J., & Bruhn, H. (1989). The influence of flow and motion in MRI of diffusion using a modified CE-FAST sequence. Magnetic Resonance in Medicine, 12(2), 198-208. doi:10.1002/mrm.1910120206.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-29A0-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-109E-2
Genre: Journal Article

Files

show Files
hide Files
:
2376697.pdf (Publisher version), 650KB
Name:
2376697.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Merboldt, K. D.1, Author              
Hänicke, W.1, Author              
Gyngell, M.L.1, Author              
Frahm, J.1, Author              
Bruhn, H.1, Author              
Affiliations:
1Research Group of Biomedical NMR, MPI for Biophysical Chemistry, Max Planck Society, ou_578633              

Content

show
hide
Free keywords: -
 Abstract: Severe motion and flow artifacts are a problem in MRI of diffusion in vivo due to the application of strong magnetic field gradients. Here it is shown that image artifacts can be removed by using a modified fast-scan MRI sequence (CE-FAST) in conjunction with averaging of diffusion-weighted images. In phantom studies slow (coherent) flow (<1 mm s-1) in the presence of strong diffusion gradients is shown to cause signal losses in diffusion-weighted images that depend on the relative orientations of the flow direction and the diffusion gradient. On the other hand, pulsatile motions of macroscopic dimensions (e.g. 1 mm, 1 Hz, in-plane) lead to smearing and ghosting of signal intensities along the phase-encoding direction of the images. In both phantoms and rabbit brains in vivo motion artifacts were found to be reducible by averaging 8-16 images. Unfortunately. the resulting image contrast no longer represents a “true” diffusion contrast but is affected by additional signal losses due to motion averaging. All experiments were performed on a 40-cm-borc 2.35-T Bruker Medspee system.

Details

show
hide
Language(s): eng - English
 Dates: 1989-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1002/mrm.1910120206
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Magnetic Resonance in Medicine
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 12 (2) Sequence Number: - Start / End Page: 198 - 208 Identifier: -