Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are unremarkable . Apart from mild atelectasis in the lung bases , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen , although the left apex is somewhat obscured due to the patient 's chin projecting over this region . The pulmonary vascularity is normal . There are no acute osseous abnormalities .
    OUTPUT:
    
No radiographic evidence for pneumonia .