Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left sided pacemaker is in appropriate position . A small right pleural effusion is either unchanged or slightly decreased compared to chest CT on ___ . Previously seen sub 3 mm pulmonary nodules on prior CT are not well seen on this radiograph . Opacity in the right lower lobe likely corresponds to rounded atelectasis seen on prior CT . Calcified pleural plaques are known bilaterally . There is a moderate right apical pneumothorax . The cardiomediastinal and hilar contours are normal .
    OUTPUT:
    
Small right pleural effusion is either unchanged or slightly decreased compared to chest CT on ___ . Right lower lobe opacity likely corresponds to rounded atelectasis seen on prior CT . Moderate right apical pnuemothorax .