Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates at the junction of the SVC and right atrium . Lung volumes remain low . Heart size is moderately enlarged , unchanged . Mediastinal and hilar contours are similar . Crowding of bronchovascular structures due to low lung volumes is present without overt pulmonary edema . Patchy opacity in the right lung base is slightly worse compared to the previous chest radiograph . The left lung is clear . No pneumothorax or large pleural effusion is identified .
    OUTPUT:
    
Increased patchy opacification in the right lung base could reflect worsening atelectasis however infection is not excluded in the correct clinical setting .