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Venous signal suppression in 3D dynamic Gd‐enhanced carotid artery imaging using the eigenimage filter
Author(s) -
Kaandorp Dave W.,
Kopinga Klaas,
Wijn Pieter F.F.
Publication year - 1999
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/(sici)1522-2594(199908)42:2<307::aid-mrm13>3.0.co;2-#
Subject(s) - signal (programming language) , carotid arteries , filter (signal processing) , medicine , nuclear magnetic resonance , radiology , computer science , physics , computer vision , programming language
A three‐dimensional dynamic gadolinium‐enhanced carotid artery imaging protocol with 10 sec per phase was evaluated with respect to the acquisition of an arterial‐only phase after contrast bolus injection. Subsequently, the eigenimage filter was used to suppress any venous signal based on a difference in arterial and venous temporal enhancement patterns. From 63 consecutive scans of the carotid bifurcation, venous enhancement in the maximal arterial phase was found to be absent in 43%, weak in 19%, and strong in 38% of cases. Our eigenimage filter successfully suppressed the low signal veins in 100% and the high signal veins in 67% of cases. The number of acquired high‐quality arterial‐only images increased from 43% without to 87% with the use of the filter. In conclusion, even when a dynamic scan cannot resolve the short physiological delay between arterial and venous enhancement, the eigenimage filter can effectively be used to suppress the veins. Magn Reson Med 42:307–313, 1999. © 1999 Wiley‐Liss, Inc.