<prompt> A lady with CA ovary in follow-up with raised CA125 level nextstep;CTPETMRIClinical exam and serial follow up of CA 125  <response>: - positron emission tomography is a functional diagnostic imaging technique, taking note of the fact that malignant cells have a greater glycolysis as ccompared to normal tissue. - it helps in staging , management and follow up of cancer growth. - it is now used in diagnosis of cancer in its early stage, detect its extent and severity. Reference : Shaw;s textbook of gynaecology,16th edition, pg no: 120 p 