Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the mid SVC . The cardiac , mediastinal and hilar contours are within normal limits and unchanged . Mild atherosclerotic calcifications are demonstrated within the aortic knob . The pulmonary vasculature is normal . Patchy opacities in the lung bases are noted , more pronounced than on the prior radiograph . No pleural effusion , focal consolidation or pneumothorax is identified . No acute osseous abnormalities visualized .
    OUTPUT:
    
Patchy bibasilar airspace opacities may reflect atelectasis though peribronchial infection is not excluded as this was seen on the previous CT .