Radiopaedia.org

There is a Type B aortic dissection extending from the distal aortic arch into the left common iliac artery associated with a large aneurysm of the proximal descending thoracic aorta. There is no active contrast leak identified. 

As already noted in the prior chest radiograph, there is a large left-sided pleural effusion with nearly complete collapse and consolidation of the left lung. This is highly likely to be secondary to rupture/leaking of the aneurysm. 

The major mesenteric vessels are noted to originate from the true lumen. The left renal artery shows reduced contrast filling and the left kidney is ischaemic.