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. Author manuscript; available in PMC: 2019 Oct 11.
Published in final edited form as: AJNR Am J Neuroradiol. 2018 Mar 15;39(4):669–677. doi: 10.3174/ajnr.A5570

Figure 2.

Figure 2

Figure 2

Figure 2

False positive venous ASL signal in two patients. A. ASL signal in the A3 branches of the anterior cerebral arteries (white arrow heads) was mistaken for venous ASL signal in a 15 year-old male patient who presented with a right parietal parenchymal hematoma. B. T2-weighted images show localization of this signal to the anterior cerebral arteries (black arrow heads). C. ASL signal in the anterior aspect of the superior sagittal sinus in a 70 year-old male with subarachnoid hemorrhage (white arrow). This patient had no evidence of a dAVF or shunting on DSA.