Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary vascular cephalization is chronic . Moderate loculated right pleural effusion going into the fissure is stable . 22 mm opacity projects at the left lung base unchanged since ___ , but could not be clearly seen before that . Mild - to - moderate cardiomegaly is unchanged . The patient is status post fusion with posterior screws at T6 through T9 levels .
    OUTPUT:
    
Left lower lung opacity could either be a focal area of atelectasis or even a lung nodule . It could not be seen before the chest x-ray of ___ . If warranted , CT scan could be done to assess this abnormality . There is no significant change since ___ in chronic pulmonary vessel cephalization and loculated pleural effusion on the right . The results have been posted to Radiology dashboard for direct notification to referring physician .