Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are surgical clips in the left upper quadrant . No pneumothorax . Low lung volumes . Heart size is unchanged . The aorta is calcified , indicating atherosclerosis . There is a linear lucency tracking lateral to the trachea . The mediastinal and hilar contours are otherwise normal . The pulmonary vasculature is normal . There is left lower lobe collapse and right lower lung atelectasis . No pleural effusion . There are no acute osseous abnormalities .
    OUTPUT:
    
Left lower lobe collapse and right lower lung atelectasis . No pneumothorax . No evidence of pulmonary edema . There is a linear lucency tracking lateral to the trachea of indeterminate etiology . Recommend follow - up radiograph for further evaluation .