Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . There has been interval removal of the previously seen left PICC . Relative left retrocardiac opacity may relate to atelectasis , although an early consolidation can not be excluded in the appropriate clinical setting . The right lung is clear . There are low lung volumes . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable , with calcified tortuous aorta again seen and the cardiac silhouette not enlarged .
    OUTPUT:
    
Left base retrocardiac opacity could relate to atelectasis , although consolidation can not be excluded in the appropriate clinical setting .