A CT image obtained at the level of the aortic arch (Panel B) showed a disparity in the pulmonary vasculature, with more visible pulmonary-artery branches in the left lung (arrows) than in the right.

• 这可与急性肺动脉血栓栓塞导致的肺动脉的充盈缺损影通常为中心型的相鉴别。此病人与大多数慢性肺动脉高压病人一样，血液高凝的原因不明。