Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates left PIC catheter projecting over mid SVC . ___- mm distal end of the catheter appears hyperdense , which is likely due to catheter folding on itself . No pneumothorax . Tracheostomy tube is in place . The patient is status post medial sternotomy . Lung volumes are low . No pleural effusions . The upper lung heterogeneous opacities are unchanged . Increased airspace opacities in the right lung base are noted . Left upper lung is essentially clear with the exception of the left lung base opacities . There is widening of the mediastinum and prominence of descending aorta , which likely relates to patient 's positioning and is more conspicuous since prior .
    OUTPUT:
    
1 . Left PIC catheter projects over mid SVC , however , its distal 10 mm tip appears hyperdense , which is likely due to catheter folding on itself . 2 . Widened mediastinum and prominent descending aorta , more conspicuous since prior , which likely relates to patient positioning . Repeat chest radiograph is recommended with better positioning to assess for possible underlying pathology . 3 . Right lung opacities have been slightly increased since ___ exam , and likely reflect multifocal infection in the appropriate clinical setting . Findings discussed with Dr . ___ at 11 :00 a .m . , ___ by phone at the time of discovery .