Comparison of matched-filtered two-dimensional projection and elliptical centric-ordered three-dimensional contrast-enhanced magnetic resonance angiography

✍ Scribed by Yuexi Huang; Naeem Merchant; Graham A. Wright

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 421 KB
• Volume: 20
• Category: Article
• ISSN: 1053-1807
• DOI: 10.1002/jmri.20139

✦ Synopsis

Abstract

Purpose

To compare the image quality of matched‐filtered two‐dimensional projection magnetic resonance angiography (MRA) and elliptical centric‐ordered (EC) three‐dimensional MRA.

Materials and Methods

Signal‐to‐noise ratios (SNRs) of matched‐filtered two‐dimensional projection and EC three‐dimensional MRA are developed theoretically and compared by clinical studies, in which 10–20 mL of gadolinium (Gd) was injected at 1.5 mL/second. The artery‐vein contrast in two‐dimensional projection MRA was managed by manually selecting specific templates for the matched filters.

Results

The SNR of matched‐filtered two‐dimensional projection MRA is superior to that of EC three‐dimensional MRA for vessels wider than one pixel due to the integral effect. The artery–vein contrast can be managed flexibly in two‐dimensional projection MRA by choosing different templates for the matched filter, while the artery–vein contrast in EC three‐dimensional MRA is solely determined by the timing to start the acquisition.

Conclusion

Matched‐filtered two‐dimensional projection MRA provides comparable image quality and is a flexible alternative to EC three‐dimensional MRA in applications where contrast timing is difficult and temporal information is of interest. J. Magn. Reson. Imaging 2004;20:435–442. © 2004 Wiley‐Liss, Inc.