Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Patchy opacity in the right lower lobe is new , but preexisting atelectasis in this lobe has partly cleared . Linear opacities in the left lobe most likely represent atelectasis . There are small bilateral pleural effusions . The aortic knob is calcified . There is mild cardiomegaly . Median sternotomy wires and mediastinal clips are from prior CABG . No pneumothorax identified .
    OUTPUT:
    
New patchy right lower lobe opacity concerning for acute aspiration . Short term follow up radiograph may be useful to exclude a developing infectious pneumonia in this region . Linear opacities in the left lung most likely represent atelectasis .