Abstract
Introduction
This study was conducted in order to evaluate the value of time-resolved contrast-enhanced magnetic resonance angiography (TR-CE-MRA) with a 3.0-T magnetic field compared to digital subtraction angiography (DSA) as the reference standard for the diagnosis of brain arteriovenous malformation (bAVM).
Methods
Nineteen patients with 19 angiographically confirmed untreated bAVM were investigated with both DSA and TR-CE-MRA for the initial diagnosis. Examinations were compared by two independent readers. Interobserver agreement and intermodality agreement with respect to nidus size, arterial feeders, and venous drainage were determined using the K statistic test. Also, the quality of the TR-CE-MRA images was evaluated.
Results
Seventeen of the 19 bAVM (89.5%) detected with DSA were diagnosed with TR-CE-MRA. Interobserver agreement for TR-CE-MRA was good for nidus size, venous drainage, and arterial feeders (K = 0.75, 95% CI 0.50–1.00; K = 0.77, 95% CI 0.54–1.00; and K = 0.80, 95% CI 0.59–1.00 respectively). Intermodality agreement was good for nidus size and venous drainage (K = 0.75, 95% CI 0.49–1.00 and K = 0.77, 95% CI 0.54–1.00, respectively) and moderate for arterial feeders (K = 0.44, 95% CI 0.17–0.70).
Conclusion
TR-CE-MRA at 3.0 T has a good sensitivity for bAVM detection and good agreement with DSA for determining nidus size and the type of venous drainage, suggesting that TR-CE-MRA is potentially a reliable tool for the diagnosis and assessment of bAVMs. However, it still suffers from low spatial resolution and vessel superposition, making differentiation of the arterial feeders of the nidus difficult at times.
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Abbreviations
- 2D:
-
Two-dimensional
- 3D:
-
Three-dimensional
- 4D:
-
Four-dimensional
- ACA:
-
Anterior cerebral artery
- bAVM:
-
Brain arteriovenous malformation
- BG:
-
Basal ganglia
- CENTRA:
-
Contrast-enhanced robust-timing angiography
- CT:
-
Computerized tomography
- DSA:
-
Digital subtraction angiography
- Embo:
-
Embolization
- F:
-
Female
- FOV:
-
Field of view
- GK:
-
Gamma knife
- L:
-
Left
- M:
-
Male
- MCA:
-
Medium cerebral artery
- MIP:
-
Maximum intensity projection
- MRA:
-
Magnetic resonance angiography
- MRI:
-
Magnetic resonance imaging
- PCA:
-
Posterior cerebral artery
- PICA:
-
Posterior inferior cerebellar artery
- R:
-
Right
- SENSE:
-
Sensitivity encoding
- TR-CE-MRA:
-
Time-resolved contrast-enhanced magnetic resonance angiography
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Machet, A., Portefaix, C., Kadziolka, K. et al. Brain arteriovenous malformation diagnosis: value of time-resolved contrast-enhanced MR angiography at 3.0T compared to DSA. Neuroradiology 54, 1099–1108 (2012). https://doi.org/10.1007/s00234-012-1024-x
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DOI: https://doi.org/10.1007/s00234-012-1024-x