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Keywords:
Vascular, MR-Angiography, MR, Embolisation
Authors:
N. K. Majewska, A. Kociemba, M. Pyda, M. Wykretowicz, M. Stajgis, K. Katulska; Poznan/PL
DOI:
10.1594/ecr2016/C-2297
Conclusion
MRI is the established method of choice for the imaging of vascular malformations.
In addition to morphological findings on T1- and T2-weighted imaging,
3D time-resolved angiography can improve diagnosis.
However,
the criteria used to classify malformations as high-flow or low-flow lesions vary considerably between studies.
In the present study we evaluated previously described methods of classification,
as well as a new method based on the slope of the enhancement curve.
The results indicate that none of the previously described methods allowed for the discrimination of high-flow from low-flow malformations with 100% specificity and sensitivity.
Determination of the slope of the enhancement curve is a new method for the classification of lesions as high or low flow.
In the present study,
a slope of 921 s-1 was established as a cut-off point to classify malformations as low-flow lesions.
In conclusion,
the slope of the enhancement curve is useful in distinguishing between high- and low-flow vascular malformations.
Nevertheless implementation of this method for routine diagnosis requires more research on a larger number of patients.