Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low inspiratory volumes . The heart is probably slightly enlarged . Aorta is prominently unfolded . There is platelike patchy opacity at the right lung base . The differential diagnosis includes platelike atelectasis , or a pneumonic infiltrate . The appearance is in keeping with findings on the outside ___ chest CT . There is some increased retrocardiac density , which could reflect collapse / consolidation and left base . Otherwise , no focal infiltrate is identified . No gross effusion . There is upper zone redistribution , without overt CHF . Note is made of surgical clips surrounding the trachea , seen immediately above the level of the clavicular heads . Incidental note is made of degenerative change involving the AC and glenohumeral joints and the visualized portion of the lower cervical spine .
    OUTPUT:
    
Patchy focally dense opacity at the right lung base , similar findings on the ___ chest CT . The radiographic appearance is compatible with either platelike atelectasis or a focal pneumonic infiltrate . Increased retrocardiac density , consistent with left lower lobe collapse and / or consolidation . Upper zone redistribution without overt CHF . Mild cardiomegaly . Prominently unfolded aorta . No evidence of thoracic aortic dissection on the ___ chest CT .