There are many benefits of a Whole Body Bone Scan, which is a technique in which radionuclides injected into the patient’s body are absorbed in the body and then imaged outside the body to clarify the condition of the entire skeleton in a single visit, without the patient having to receive too much radiation. The radionuclide can accurately show changes in the lesion and also the molecular metabolism level of the diseased cells, revealing the disease more accurately. Whole-body bone scan overcomes the limitations of other imaging tests. For patients with tumors such as lung cancer, breast cancer, prostate cancer, etc., whole-body bone scan should be done every six months regardless of whether they have symptoms or not. Especially before and after the initial diagnosis and treatment, whole-body bone scan will make accurate assessment of the patient. There was a patient who had hip pain and limitation of walking in lower limbs, and the cause was not identified after several examinations, so he underwent whole-body bone scanning, and the image showed that there were multiple radiological concentrations in his pelvis and sacrum, and combined with blood tests, it was confirmed that the patient had bone metastasis of prostate cancer, and the whole-body bone scanning technology could make a clear diagnosis for him.