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(FRAME-INFO (STRING "MRI Composite. \(Scans compliments of Dr. K. Maravilla, Dept. of Radiology, University of Washington\). Four serial MRI slices at close intervals are shown. The upper left slice \(A\) is the ventralmost, passing through the pons, cerebellum and temporal poles. Find the basilar artery in the midline and the internal carotid arteries medial to the temporal lobes. The upper right slice \(B\) is slightly more dorsal and passes through the pituitary fossa. Find the internal carotid arteries near the fossa, the basilar artery at the anterior surface of the brainstem, and the posterior communicating arteries angled \(45 degrees\) between the brainstem and temporal lobes. The lower left slice \(C\) passes through the midbrain. Note the posterior cerebral artery adjacent to the midbrain. The lower right slice \(D\) is the dorsalmost of this series, and is the same as seen on the previous frame; it passes through the hypothalamus. Note the optic tracts lateral to the hypothalamus. Find the anterior cerebral artery in the longitudinal fissure between the frontal lobes, the middle cerebral artery in the lateral fissure, and the posterior cerebral artery between the midbrain and temporal lobe. "))
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(REGION (TYPE "STRUCT")
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(REGION (TYPE "STRUCT")
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(REGION (TYPE "STRUCT")
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