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TR-3D-CE-MRA with a high diagnostic confidence index for the vascular study. In comparison with the CCA, the findings were the following: artifacts, none; arterial-to-venous separation, excellent; vascular visibility: ophthalmic artery, 2/2; PICA, 2/2; occipital artery, 2/2; ISS, 2/2; AUC, 12,606. Note a small occipital AVM. A and B, Sagittal views with early arterial and intermediate arterial phases (note a very faint venous signal intensity). C, Sagittal view with a venous phase.
