| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Radiology, Gasthuisberg University Hospital, Catholic University
of Leuven, Herestraat 49, B-3000 Leuven, Belgium.
2 ESAT-PSI, Gasthuisberg University Hospital, Catholic University of Leuven,
Herestraat 49, B-3000 Leuven, Belgium.
3 Philips Medical Systems, Veenpluis 4-6, 5680 DA Best, The Netherlands.
OBJECTIVE. The goal of our study was to evaluate a new three-dimensional real-time navigator MR coronary angiography sequence to noninvasively visualize the coronary arteries.
SUBJECTS AND METHODS. Fifteen healthy volunteers underwent MR coronary angiography with a new balanced turbo field-echo sequence in comparison with the standard turbo field-echo sequence. Signal-to-noise, blood-to-myocardium, blood-to-fat, and blood-to-pericardial fluid contrast ratios of the left and right coronary artery systems were measured. Image quality was graded, the length and diameter of the coronary arteries were measured, and the number of visible side branches was assessed.
RESULTS. The balanced turbo field-echo images yielded a higher blood-to-myocardium and blood-to-pericardial fluid contrast ratio, a similar blood-to-fat contrast ratio, and a lower signal-to-noise ratio than the turbo field-echo images. On a 5-point grading scale (1, nondiagnostic or unreadable; 2, poor; 3, moderate; 4, good; 5, excellent), image quality was rated significantly better for the balanced turbo field-echo sequence than for the turbo field-echo sequence (left coronary artery, 4.0 ± 0.6 vs 3.6 ± 0.5 [p = 0.015]; right coronary artery, 4.4 ± 0.4 vs 3.6 ± 0.4 [p < 0.0001], respectively), resulting in a significantly longer segment of the three major coronary arteries visualized (left anterior descending coronary artery, 92 ± 21 mm vs 79 ± 24 mm; left circumflex coronary artery, 70 ± 7 mm vs 60 ± 18 mm; right coronary artery, 112 ± 28 mm vs 95 ± 27 mm) and a significantly higher number of side branches visualized (left anterior descending coronary artery, 2.9 ± 1.3 vs 1.5 ± 1.3; left circumflex coronary artery, 2.1 ± 1.7 vs 1.0 ± 1.2; right coronary artery, 3.7 ± 1.7 vs 2.6 ± 1.5). Mean imaging time per coronary artery was significantly shorter for the balanced turbo field-echo sequence (5.7 ± 1.0 min) than for the turbo field-echo sequence (8.4 ± 1.4 min) (p < 0.0001).
CONCLUSION. Compared with standard turbo field-echo MR coronary angiography, optimized balanced turbo field-echo MR coronary angiography improves the visualization of the coronary arteries and their side branches within a significantly shorter imaging time.
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati What's this?
This article has been cited by other articles:
|
|
 |
|
  M. Ozgun, A. Hoffmeier, M. Kouwenhoven, R. M. Botnar, M. Stuber, H. H. Scheld, W. J. Manning, W. Heindel, and D. Maintz Comparison of 3D Segmented Gradient-Echo and Steady-State Free Precession Coronary MRI Sequences in Patients with Coronary Artery Disease Am. J. Roentgenol., July 1, 2005; 185(1): 103 - 109. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. Jahnke, I. Paetsch, B. Schnackenburg, A. Bornstedt, R. Gebker, E. Fleck, and E. Nagel Coronary MR Angiography with Steady-State Free Precession: Individually Adapted Breath-hold Technique versus Free-breathing Technique Radiology, September 1, 2004; 232(3): 669 - 676. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Spuentrup, M. Katoh, A. Buecker, W. J. Manning, T. Schaeffter, T.-H. Nguyen, H. P. Kuhl, M. Stuber, R. M. Botnar, and R. W. Gunther Free-breathing 3D Steady-State Free Precession Coronary MR Angiography with Radial k-Space Sampling: Comparison with Cartesian k-Space Sampling and Cartesian Gradient-Echo Coronary MR Angiography--Pilot Study Radiology, May 1, 2004; 231(2): 581 - 586. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
