Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the prior study . The lungs are clear without focal consolidation , pulmonary edema , pleural effusion or pneumothorax . Normal cardiac and mediastinal contours .
    OUTPUT:
    
Normal chest radiograph without findings to explain the patient 's shortness of breath and chest heaviness .