Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight asymmetric lucency overlying the right lung base with a deep sulcus sign likely reflects the small right pneumothorax seen on CT and appears similar compared to the previous chest radiograph . Lung volumes remain low with patchy opacities in the lung bases , compatible with atelectasis on the left and contusion with atelectasis on the right . Cardiac , mediastinal and hilar contours are within normal limits . No evidence of mediastinal shift . There is no pulmonary edema . Multiple right - sided rib fractures are better assessed on the recent CT . Right humeral head remains anteriorly dislocated and a right scapular fracture is incompletely imaged .
    OUTPUT:
    
Small right pneumothorax is likely not substantially changed allowing for differences in technique .