Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 15 :55 is submitted .
    OUTPUT:
    
There is a diffuse parenchymal process throughout most of the left lung which would be concerning for pneumonia rather than edema , especially when correlated with the recent chest CT of ___ . A right pleural effusion with associated patchy airspace opacity is unchanged . Overall cardiac and mediastinal contours are difficult to assess due to patient rotation on the current study . No pneumothorax .