AJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Yao, L.
Right arrow Articles by Thomasson, D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Yao, L.
Right arrow Articles by Thomasson, D.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?

Magnetization Transfer Contrast in Rapid Three-Dimensional MR Imaging Using Segmented Radiofrequency Prepulses

Lawrence Yao1 and Dave Thomasson2

1 Department of Radiology, National Institutes of Health, Bldg. 10, Rm. 1C-640, 10 Center Dr., MSC 1182, Bethesda, MD 20892-1182.
2 Siemens Corporation, Iselin, NJ 08830.



View larger version (141K):

[in a new window]
  		Fig. 1A. —MR images of brain of 29-year-old healthy male volunteer. This axial three-dimensional (3D) gradient-echo MR image was obtained without prepulses (44 sections reconstructed at 2.5-mm thickness; scanning duration, 25 sec). Signal-to-noise ratio in white matter is 24.

 


View larger version (133K):

[in a new window]
  		Fig. 1B. —MR images of brain of 29-year-old healthy male volunteer. Axial 3D gradient-echo MR image obtained with segmented magnetization transfer prepulses at same level as A (scanning duration, 27 sec) shows magnetization transfer contrast is manifested by diminished contrast between gray and white matter. Signal-to-noise ratio in white matter is 20.

 


View larger version (137K):

[in a new window]
  		Fig. 2A. —MR arthrograms of shoulder in 32-year-old man with suspected gleno-humeral instability. Axial three-dimensional (3D) gradient-echo MR image obtained using fat saturation and magnetization transfer prepulses (64 sections reconstructed at 1.1-mm section thickness) shows bright injected fluid delineating anatomy of gleno-humeral capsule. Signal-to-noise ratio of injected material is 44. Magnetization transfer contrast increases contrast-to-noise ratio between injected fluid and muscle from 11.6 to 19.7

 


View larger version (145K):

[in a new window]
  		Fig. 2B. —MR arthrograms of shoulder in 32-year-old man with suspected gleno-humeral instability. Axial 3D gradient-echo MR image obtained using parametric magnetization transfer pulses at same level as A reveals no discernible magnetization transfer contrast in injected fluid or in fatty marrow spaces, whereas degree of magnetization transfer contrast varies in skeletal muscle, cartilage, and capsular supporting structures (color scale = 0-100%).

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?



HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2002 by the American Roentgen Ray Society.