Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . On the frontal view , there is increased opacity at the right lung base medially , similar to prior . This could represent residual atelectasis or scarring given perisistence although infection is not entirely excluded . The left lung is grossly clear . The cardiomediastinal silhouette is unchanged . Mid thoracic dextroscoliosis may be positional .
    OUTPUT:
    
Persistent right basilar opacity seen medially potentially due to persistent atelectasis , or scarring . Infection is not entirely excluded .