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Fig. 1A 46-year-old woman with breast carcinoma and facial swelling.
Axial true fast imaging with steady-state precession image (TR/TE, 4.8/2.3;
flip angle, 70°; matrix, 134 x 256; slice thickness, 5 mm) at level
of mid chest shows low-signal-intensity filling defect in superior vena cava
(SVC) (arrow). Small area of high signal intensity in medial aspect
of SVC (arrowhead) is consistent with patent lumen.