Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP chest radiograph was obtained . A moderate right pleural effusion has substantially decreased in size status post thoracentesis . There is no pneumothorax . The left lung volume is low but the lung appears clear . There are no new abnormal cardiac or mediastinal contours . A right chest Port - A - Cath is in stable position .
    OUTPUT:
    
Decreased size of moderate right pleural effusion status post thoracentesis .