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. Author manuscript; available in PMC: 2015 Mar 17.
Published in final edited form as: Eur Radiol. 2014 May 28;24(8):1942–1949. doi: 10.1007/s00330-014-3219-5

Fig. 4. 42-year old woman with confirmed PE.

Fig. 4

Arterial-phase MRA (A), delayed-phase MRA (B) and corresponding CT (C). The central signal drop in a left lower lobe segmental pulmonary artery (arrow) corresponded to a true pulmonary embolus as confirmed by CT. Signal dropout was 57% and 52% at arterial-phase and delayed-phase MRA, respectively. Of note, this embolus was the only one that was detected in this patient and could easily have been mistaken for a truncation artifact due to its central location within the vessel and relatively small signal intensity drop.