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[Untitled]

Authors :
A. de Roos
Martin N. J. M. Wasser
J.H.C. Reiber
R.J. van der Geest
J.J.M. Westenberg
Peter M. T. Pattynama
J. Vanderschoot
Source :
The International Journal of Cardiac Imaging. 15:161-173
Publication Year :
1999
Publisher :
Springer Science and Business Media LLC, 1999.

Abstract

In this study, a scanning protocol was developed to image the arterial bed of the pelvis and both legs along their entire length in patients with peripheral arterial disease, using standard hard-and software. Three adjacent stations are acquired consecutively, with some small overlap; per station; one Gadolinium contrast bolus is administered. The scanning protocol was optimized in an in vitro phantom study. The optimal flip angle was found to be 50°. Also, the optimal scan delay was chosen to be equal to the arrival time of the contrast bolus thereby minimizing artifacts. Three contrast bolus injections showed sufficient enhancement of the vessels after image subtraction. Finally, stenosis quantification by manual caliper was performed by five observers in the MRA images and correlated with the percent diameter reduction determined by quantitative angiography from corresponding X-ray images. The results of the MRA measurements were reproducible and intra- and inter-observer variabilities were statistically non-significant (p = 0.54 and p = 0.12, respectively). Stenosis quantification performed by four observers showed a good correlation with the X-ray derived values (r p > 0.90, p < 0.02); the results from one observer were not significantly correlated. Five patients with proven peripheral disease were investigated with this new MRA scanning protocol. The images were of good quality which allowed adequate clinical evaluation; the original diagnoses obtained from X-ray examinations, were confirmed with MRA. In conclusion, peripheral arterial disease can be evaluated adequately with this MR scanning protocol.

Details

ISSN :
01679899
Volume :
15
Database :
OpenAIRE
Journal :
The International Journal of Cardiac Imaging
Accession number :
edsair.doi...........e5ab28f34ba3b8551f82f86441f2fdce
Full Text :
https://doi.org/10.1023/a:1006166330001