Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , lung volumes are lower , causing crowding of bronchovascular structures . Patient is post CABG with intact median sternotomy wires and unchanged mediastinal clips . Mild cardiomegaly is unchanged . Lungs are clear without focal consolidation or pneumothorax . A calcified 1 .1 cm granuloma , as seen on this chest CT , is noted in the right lower lung . Although chest radiograph is not optimal for evaluation after chest trauma , no acute bony abnormality identified .
    OUTPUT:
    
Lower lung volumes , and unchanged mild cardiomegaly . No acute cardiopulmonary process .