Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation is seen . There is slight blunting of the left costophrenic angle on the frontal view , not well substantiated on the lateral view , may be due to pleural thickening or a very trace pleural effusion . There is no pneumothorax . The aorta is calcified . The cardiac silhouette is not enlarged . Degenerative changes are seen along the spine .
    OUTPUT:
    
No focal consolidation . Slight blunting of the left costophrenic angle on the frontal view , not well substantiated on the lateral view , of indeterminate age , could be due to mild pleural thickening , although a trace pleural effusion is not excluded .