Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a subtle 1 .2 cm nodular opacity projecting over the right mid lung zone , approximately at the level of the anterior right 6th rib , not clearly seen on the prior study . The left lung is clear . There is slight blunting of the posterior left costophrenic angle which may be artifactual but trace pleural effusion is difficult to exclude . No overt pulmonary edema is seen . The cardiac and mediastinal silhouettes are stable and unremarkable .
    OUTPUT:
    
1 .2 cm nodular opacity projecting over the right mid lung , as above . Recommend either oblique radiographs or chest CT for further evaluation . Slight blunting of the posterior left costophrenic angle which may be artifactual but trace pleural effusion is difficult to exclude .