Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild transverse cardiomegaly . Pulmonary vascular congestion with mild interstitial thickening . Small left - sided pleural effusion . Left lower lobe atelectasis . Unfolded aortic arch and rotation contribute to a widened mediastinum . Degenerative bony changes .
    OUTPUT:
    
Pulmonary vascular congestion with associated interstitial edema and a small left - sided pleural effusions suggest fluid overload / cardiac decompensation . Left lower lobe atelectasis . Unfolded aortic arch and rotation are most likely responsible for the widened mediastinum , but correlation with a PA erect , non rotated radiograph is advised .