Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is limited secondary to portable technique , relatively low lung volumes and patient body habitus . That said , there increased interstitial markings throughout the lungs bilaterally , similar compared to prior . This could be due to pulmonary edema or chronic interstitial process and is not significantly changed from prior . Blunting of the costophrenic angles bilaterally may be due to atelectasis or effusions . Cardiomediastinal silhouette is not significantly changed especially in light of rotation to the right .
    OUTPUT:
    
Increased interstitial markings despite limitations of technique which could represent edema although chronic underlying interstitial process or combination both is possible .