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A, a 3.7-French (F) scanning fiber endoscope (SFE) used in this study exiting from a 5-F Envoy guide catheter, demonstrating the 8-mm radiopaque tip. Scale bar = 5 mm. B, the SFE deployed in combination with a 9-F coaxial balloon guide catheter and 2.5-F microcatheter for imaging of mechanical thrombectomy with a stent retriever.
