Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight blunting of the right costophrenic angle may be due to a trace pleural effusion versus pleural thickening . Mild right base atelectasis is seen . There is no focal consolidation . No evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . There is no pulmonary edema . Chronic appearing rib deformity at the lateral left ninth rib .
    OUTPUT:
    
Blunting of the right costophrenic angle could be due to a trace pleural effusion versus pleural thickening . No focal consolidation to suggest pneumonia .