Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . Areas of mild left base linear atelectasis are seen . Particularly over left mid lung , between the posterior left seventh and eighth ribs , is a 7 - mm nodular opacity , which may represent overlapping structures , however pulmonary nodule is not excluded and further evaluation with oblique chest radiographs is recommended . The remainder of the lungs appear clear . No pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are unremarkable . Degenerative changes are seen in the right acromioclavicular joint .
    OUTPUT:
    
7 - mm nodular opacity at the left mid lung for which further evaluation with oblique radiographs recommended .