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Fig. 3C 43-year-old man with pulmonary embolism. Coronal curved reconstructions from coronal 3D fat-saturated T1-weighted gradient-echo acquisition (4.2/1.7; flip angle, 25°; matrix, 160 x 256; slice thickness, 2 mm after interpolation) obtained 40 sec after arterial peak of biphasic injection of double dose of gadolinium (0.1 mL/kg body weight at 2 mL/sec followed by 0.1 mL/kg body weight at 0.8 mL/sec) shows normal enhancement of both right (B) and left (C) external iliac and common femoral veins (arrowheads). Nonocclusive thrombus is seen in left common iliac vein (arrow, C). Filling defects shown on true FISP image (A) are likely related to turbulent flow, pulsation artifact, or both. Doppler sonography examination (not shown) depicted no thrombus in common femoral veins. Follow-up MR examination (not shown) showed resolution of nonocclusive thrombus in left iliac vein after anticoagulation therapy.