Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There are midline sternotomy wires and mediastinal clips again noted . A nodular opacity in the left mid lung is less conspicuous than on prior exam and could represent a focus of scarring , though a CT may be obtained to further characterize if it is not completely resolved on followup exams . There are bibasilar opacities , most compatible with bronchovascular crowding given the low lung volumes . No large effusion or pneumothorax . The heart size is top normal . The mediastinal contour is stable , reflective of a somewhat unfolded thoracic aorta . The bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Low lung volumes with lower lung opacities most compatible with bronchovascular crowding . Left mid lung nodular opacity is less conspicuous . Recommend continued followup to resolution . If this opacity does not resolve , a CT should be obtained .