Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided cardiac generator pack projects leads into the right ventricle and atrium . Coarse widespread reticular opacities across both lungs are again seen . A previously seen right basilar opacity on the ___ chest radiograph appears improved . There is no pneumothorax or pleural effusion . Linear bibasilar densities likely reflect atelectasis .
    OUTPUT:
    
Chronic - appearing widespread reticular opacities . No superimposed acute process .