Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Mild prominence of the interstitial markings bilaterally is similar compared to the prior study may indicate mild interstitial edema which may be chronic . Patchy right basilar opacity is stable to possibly slightly increased compared to the prior study , may relate to atelectasis and edema ; however , early / mild infectious process is not excluded . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Increased interstitial markings bilaterally suggesting interstitial edema , chronic . Slight increase in patchy opacity at the right lung base is nonspecific and could relate to atelectasis ; however , infectious process not excluded .