Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . No pleural effusion is seen . No focal consolidation . Heart size is within normal limits . Mediastinal prominence reflect 's an unfolded thoracic aorta in this patient with known type B aortic dissection . Imaged bony structures are intact .
    OUTPUT:
    
In this patient with known type B aortic dissection , no acute findings are evident on chest radiograph .