Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings are seen in the mid to lower lung fields bilaterally may be due to chronic interstitial pulmonary disease although an acute component is not excluded in the absence of priors for comparison . No pleural effusion or pneumothorax is seen . The patient is status post median sternotomy . The aorta is calcified and tortuous . The cardiac silhouette is top - normal . Degenerative changes are not well evaluated along the spine .
    OUTPUT:
    
Increased interstitial markings are seen in the mid to lower lung fields bilaterally may be due to chronic interstitial pulmonary disease although an acute component is not excluded in the absence of priors for comparison . No evidence of pneumothorax .