Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views of the chest are obtained . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are stable and unremarkable . Again seen is a left retrocardiac rounded opacity , which corresponds to Bochdalek hernia as seen on multiple priors , including CT from ___ .
    OUTPUT:
    
No acute cardiopulmonary process .