Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Lower lung volumes are seen on the current exam , particularly on the frontal view . Relatively linear left basilar opacity is likely due to atelectasis as it is not seen on the lateral view . Elsewhere , the lungs are clear . There is no effusion or pulmonary vascular congestion . Degree of cardiomegaly is unchanged , given lower inspiratory volumes . No acute osseous abnormality is identified . Gaseous distention of the colon seen below the left hemidiaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .