Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an opacity at the right lung base , and an additional subtle opacity in the right upper lobe which is seen only on frontal view . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Right lower lobe pneumonia , and possible right upper lobe pneumonia . Recommend follow - up radiographs in 4 weeks to evaluate for resolution .