Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph was provided . A left PICC continues to be within the lower right atrium and should be retracted for better positioning . Nasogastric tube courses below the diaphragm and terminates in the stomach . Lungs are clear without focal consolidation , pleural effusion or pneumothorax . The heart is mildly enlarged , likely projectional . Bones are intact . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
Left PICC continues to be in the low right atrium . Recommend retracting 3 - 4 cm for better positioning .