Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest demonstrates clear lungs bilaterally with focal opacity worrisome for pneumonia . Allowing for suboptimal technique , heart size appears top normal in size . There is no pneumothorax or pleural effusion , although the right costophrenic angle is incompletely visualized . Osseous structures are without acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality . No focal opacity convincing for pneumonia .