Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is difficult to evaluate , but there is suggestion of a left ventricular configuration and possibly mild - to - moderate cardiac enlargement . There is mild relative elevation of the right hemidiaphragm compared to the left , and lung volumes are low overall . Patchy opacity obscures the left cardiac border and left costophrenic angle . In addition , there is diffuse mildly increased prominence of the pulmonary vascularity , including indistinct upper zone redistribution . There is no definite pleural effusion or pneumothorax , although a small pleural effusion is difficult to exclude .
    OUTPUT:
    
Patchy opacity projecting over the left lower lateral chest , suggesting pneumonia in the appropriate setting ; findings also suggestive of mild vascular congestion .