Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views were obtained of the chest . The lungs are well expanded and clear . There is no pleural effusion or pneumothorax . The heart is stably enlarged with changes of prior valve repair and coronary bypass demonstrated . Previously described right sided nodule is not evident on the current examination .
    OUTPUT:
    
No acute intrathoracic process .