Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph ___ at 14 :01 is submitted .
    OUTPUT:
    
Cardiac and mediastinal contours are within normal limits given portable technique . Slightly diminished lung volumes with right basilar patchy opacity most likely reflecting atelectasis , although pneumonia or aspiration can not be entirely excluded . No pleural effusions . No pulmonary edema . No pneumothorax , although the sensitivity to detect pneumothorax is diminished given supine technique .