Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi erect chest film ___ at 06 : 29 is submitted .
    OUTPUT:
    
There is slight elevation of the right hemidiaphragm of uncertain significance . Subtle patchy opacity at the right medial lung base likely reflects atelectasis , although pneumonia can not be entirely excluded . The left lung is clear . No pleural effusions or pneumothorax . No evidence of pulmonary edema . Overall cardiac and mediastinal contours are within normal limits given portable technique .