Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes contribute to crowding of vascular structures . With this in mind , there is no evidence of focal consolidation concerning for pneumonia . There is no pleural effusion . There is known pneumothorax . There is no pulmonary edema . The heart size is normal .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .