Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right internal jugular Swan - Ganz catheter terminates in proximal right pulmonary artery . The IABP terminates at the level of carina . There is no pulmonary edema . There is mild platelike atelectasis in the left lung base . There is no pleural effusion , or pneumothorax . Lung volume is low . Cardiomediastinal silhouette is upper limits of normal and unchanged . Right midclavicular deformity is likely a healed prior fracture .
    OUTPUT:
    
There is mild platelike atelectasis at left lung base , otherwise no notable change .