Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . AP technique limits evaluation for cardiomegaly , though the heart does appear to be top normal in size . No signs of CHF / pulmonary edema . No large effusion or pneumothorax is seen . No definite signs of pneumonia . A vague nodular opacity projects over the left upper lung which could represents an artifact , though a pulmonary nodule not excluded . Bony structures are intact . Degenerative changes are partially imaged in the T - spine .
    OUTPUT:
    
Limited exam , with top normal heart size . Possible nodule in the left upper lung . Dedicated PA and lateral views may be obtained to better asses .