Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate low lung volumes likely secondary to poor inspiration . There has been interval removal of a right IJ central line and the chest tube overlying the heart shadow . There is no pneumothorax or other complication seen . Pigtail chest tube remains in appropriate position in the left chest . Right PICC line is unchanged from prior exam . There is interval improvement in the left pleural effusion . The lungs are otherwise clear . Cardiac silhouette is unchanged in size .
    OUTPUT:
    
Improved left pleural effusion . Cardiac shadow size unchanged . Otherwise essentially unchanged chest radiograph .