Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right sided dialysis catheter tip terminates in the low SVC . Lung volumes are low . Heart size is normal . The mediastinal and hilar contours are unchanged . There is crowding of the bronchovascular structures , but no frank pulmonary edema is present . Previously noted patchy opacities in the right upper lobe have improved . There is worsening ill - defined opacification within the left lung base . No large pleural effusion or pneumothorax is demonstrated . Bronchial wall thickening is most pronounced within the left lung base and likely reflective of bronchitis . Areas of callus formation are noted involving multiple bilateral ribs . Partially imaged is fusion hardware within the cervical and thoracic spine .
    OUTPUT:
    
1 . Worsening opacification in the left lung base with associated bronchial wall thickening concerning for infection . 2 . Slight interval improvement in previously noted airspace disease within the right upper lobe . 3 . No definite pulmonary edema .