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Columns 1–5 show images of the clinical cases 6–10. Rows 1–4 show the original unfiltered images, after application of the directional filter, bilateral filter, and wavelet thresholding. Image 1 shows a coil within a microcatheter, and images 2–4 show a guidewire and a microcatheter. Image 4 shows a microcatheter filled with contrast agent.
