CT pulmonary angiogram (CTPA) is requested by the clinical team to exclude a pulmonary embolus.
On the standard soft tissue windows (1st stack), the pulmonary arteries enhance normally with no filling defects. On re-windowing to vascular windows (2nd stack), linear high density abnormalities are seen in the right main pulmonary artery and its segmental branches. Further abnormalities in the left pulmonary artery segmental branches.