Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes have decreased since the prior exam . Central bronchovascular congestion persists despite low volumes . Opacity in the right lower lobe persists . No large pleural effusion or pneumothorax . Cardiomegaly is moderate . Prominence of the pulmonary artery is are better assessed on the prior CT . Left cardiac pacer defibrillator is unchanged . Median sternotomy wires and mediastinal are also unchanged .
    OUTPUT:
    
1 . Persistent right lower lobe opacity , thought to be pneumonia on CT . Recommend follow - up imaging 6 weeks after treatment to ensure resolution and exclude underlying lesion . 2 . Lower lung volumes .