Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy with tracheostomy tube in unchanged position . Left main stem bronchial stent remains in unchanged position with narrowing of the stent proximally . Lung volumes remain low . Heart size is accentuated due to low lung volumes but appears mildly enlarged . Mediastinal contours are unchanged . Bronchovascular crowding is re - demonstrated as a result of low lung volumes . Patchy opacities are seen within the right lung base . Additional hazy opacity within the left upper lung field appears new compared to the previous study , concerning for an area of infection . Small bilateral pleural effusions are noted . No pneumothorax is seen . Left lateral pleural thickening is again demonstrated . No acute osseous abnormality is detected .
    OUTPUT:
    
1 . Ill - defined hazy opacity in the left upper lung field as well as patchy opacity within the right lung base . Findings are concerning for areas of multifocal pneumonia . 2 . Small bilateral pleural effusions . 3 . Left main stem bronchial stent in unchanged position , though the proximal aspect appears narrowed , new compared to the prior study .