Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is slight blunting of the right costophrenic angle and a trace pleural effusion with overlying atelectasis is not excluded . The left lung is clear . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . The aortic knob is calcified .
    OUTPUT:
    
Slight blunting of the right costophrenic angle with subtle linear opacity at the right costophrenic angle , could be due to a very trace pleural effusion with overlying atelectasis .