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Fig. 10A Traumatic pseudoaneurysm in subclavian artery of 38-year-old
man. Coronal unenhanced (A) and axial enhanced (B) T2-weighted
images show mass (arrows) in region of right subclavian artery
compressing brachial plexus. Note concentric rings of varying signal
intensities due to clot that forms walls of this pseudoaneurysm.