Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable chest radiograph is provided . The lungs are clear . No pneumothorax is identified . Cardiomediastinal contours are within normal limits for technique . No pleural effusions are present . Right clavicular displacement has improved although the right clavicle still appears slightly lower than the left at the sternocleidal junction . This is not ideally assessed on a portable CXR and could be more fully evaluated on standard clavicle radiographs when the patient 's condition permits .
    OUTPUT:
    
No evidence of pneumothorax .