Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and prosthetic cardiac valve again noted . There is subtle opacity projecting over the bilateral lung apices on knee frontal view which likely represents prominent costochondral junction calcification though difficult to exclude an underlying lesion . Otherwise the lungs appear clear . No pleural effusion , pneumothorax or signs of edema . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen . Right hemidiaphragm remains mildly elevated . Surgical anchors project over the right humeral head .
    OUTPUT:
    
Vague opacity in the upper lungs likely represent prominent costochondral junction calcification - recommend apical lordotic view to better assess . Otherwise unremarkable exam .