<prompt> Kerley B lines seen inPulmonary embolismPulmonary edemaCarcinoma bronchusLung abscess  <response>: In pulmonary edema,the vascularity of the lung fields becomes more prominent,and the right and left pulmonary aeries dilate.Subsequently,interstitial edema causes thickened interlobular septa and dilated lymphatics.These are evident as horizontal lines in the costophrenic anglesseptal or Kerley B lines. 