Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal and hilar contours are unremarkable . Again seen is the opacity in the left lower lobe measuring approximately 2 .4 x 1 .7 cm , of uncertain etiology . This may be a calcification at the costochondral junction however pulmonary nodule can not be ruled out .
    OUTPUT:
    
No acute cardiopulmonary process . Again seen is nodular opacity in the left lower lobe adjacent to the left heart border . This may be a calcification at the costochondral junction however pulmonary nodule can not be excluded . Consider nonemergent CT chest for further evaluation .