Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse increased opacity at the lung bases is likely secondary to soft tissue attenuation in this obese patient . No pleural effusion is evident on the concurrent CT . There is no pulmonary edema . No confluent opacity is identified . Cardiomediastinal and hilar contours are within normal limits . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary process . No free air .