Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 00 :32 is submitted .
    OUTPUT:
    
Tracheostomy tube and right subclavian PICC line unchanged in position . Left retrocardiac mass unchanged . Improving aeration at the bases with residual patchy opacities suggestive of resolving atelectasis . No pulmonary edema . Overall cardiac and mediastinal contours are likely stable given differences in patient positioning between studies . No obvious pneumothorax or large effusions . Apparent curvilinear lucency projecting beneath the right hemidiaphragm and in the epigastric region are felt to more likely be artifactual rather than representing free intraperitoneal air given semi-erect positioning , but this can be better assessed on followup imaging . Multiple old left - sided rib fractures .