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| Imaging modality | Ratio of modality usage |
|---|---|
| Conventional angiography | 30/56 (53.6%) |
| Computed tomography | 29/56 (51.8%) |
| Magnetic resonance imaging | 28/56 (50.0%) |
| Digital Subtraction Angiography | 9/56 (16.1%) |
| Doppler-Ultrasound | 5/56 (8.9%) |
| Other * | 2/56 (3.6%) |
* Scintigraphy and Time-Of-Flight-MRI.
