Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low and there is crowding of the bronchovascular structures . There is no pleural effusion , pneumothorax , or acute consolidation . Cardiac silhouette is top - normal in size but likely secondary to technical factors . Asymmetric elevation of the right hemidiaphragm is noted . There is no acute osseous abnormality . There is no free air underneath the bilateral hemidiaphragms . Right ventriculoperitoneal shunt catheter projects over the right hemithorax . Cardiac rhythm recorder is projecting over left lung base .
    OUTPUT:
    
No evidence pneumonia .