Figure 3. CT pulmonary angiogram (a) at the level of the aortic arch, showing enlarged upper lobe arteries, and (b) at the level of the left pulmonary artery, where no filling defect is seen in the central pulmonary arteries.
Figure 3. CT pulmonary angiogram (a) at the level of the aortic arch, showing enlarged upper lobe arteries, and (b) at the level of the left pulmonary artery, where no filling defect is seen in the central pulmonary arteries.