Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . There is no focal consolidation , effusion , or pneumothorax . 2 discrete nodular opacities are seen projecting over the left mid lung adjacent to the left heart border likely representing prominent costochondral calcification . However , pulmonary nodules difficult to exclude . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact .
    OUTPUT:
    
No evidence of pneumonia or edema . Nodular structures in the left mid lung likely prominent costochondral calcification though difficult to exclude pulmonary nodule . If there are elevated risk factors , consider nonemergent chest CT to further assess .