Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest show decreased lung volumes . There is no focal opacity , pleural effusion or pneumothorax . Elevation of the right hemidiaphragm is unchanged . Mild cardiomegaly is stable .
    OUTPUT:
    
No acute cardiopulmonary process . Mild cardiomegaly unchanged since ___ .