Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is relatively elevated right hemidiaphragm . Linear right basilar opacities may be secondary to atelectasis . A 1 .2 cm left mid lung nodular opacity is noted projecting over the posterior left seventh rib . The lungs are otherwise clear , there is no effusion . Moderate cardiomegaly is noted . Atherosclerotic calcifications seen at the aortic arch . No acute osseous abnormalities . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
Linear right basilar opacities potentially due to atelectasis . Focal nodular opacity in the left mid lung for which a nonurgent dedicated chest CT is suggested , unless older exams available to document stability .