bone imaging

Bone imaging can diagnose bone tumors and bone metastases 3 to 6 months earlier than X-ray examination, but it should be noted that this method is highly sensitive and low specific. Basic Information Specialist Category: Oncology Inspection Category: Radionuclide Applicable gender: whether men and women apply fasting: not fasting Tips: Listen to the doctor to drink plenty of water. Adults should drink 500-1000ml within 2 hours after injection of imaging agent. Normal value normal. Clinical significance 1. Find the source of bone metastases for cancer. 2, the patient complained of local bone pain, excluding osteoma and other bone disorders. 3. Observe the blood supply and survival of the graft bone. 4. Determine the irradiation field, amputation range and pre-biopsy location of radiotherapy. 5, to determine the fine fractures difficult to find on the X-ray, and to distinguish between old or new compression vertebral fractures. 6, early diagnosis of osteomyelitis, bone and joint disease and certain metabolic bone diseases. 7. Exclude bone lesions in patients with unexplained serum alkaline or acid phosphatase. 8. Follow-up of femoral head blood supply after femoral neck fracture and diagnosis of juvenile deformable chondritis. 9. Diagnosis of normal ossified tissues or lesions (such as ectopic bone and ossifying myositis). Precautions Preparation before inspection: no special preparation is required. But drain the urine, taking care not to let the urine contaminate the patient's clothing and body. At the time of examination: listen to the doctor to drink plenty of water, adults should drink 500~1000ml within 2h after injection of imaging agent. Inspection process Inspection process: Conventional bone imaging: refers to systemic or localized static bone imaging 2-3 hours after intravenous injection of bone imaging agent. The intravenous imaging agent was waited for 2-3 hours. At this time, most of the imaging agents that did not enter the bone tissue were excreted from the kidneys, and the radioactivity in the blood was significantly reduced as the background, and the bone imaging was clear. Since the bone imaging agent is unevenly distributed in the body bone of normal people, the method of comparing the radioactivity of the left and right sides of the symmetrical portion is used to identify the lesion site and the normal bone tissue. Dynamic bone imaging: refers to the three-phase bone imaging technique. The three-phase imaging technique is to perform multiple imaging at different times after intravenous injection of bone imaging agent to collect blood flow, blood pool and delay ( Static) Bone imaging data, Tc-MDP "shot" intravenous injection immediately after a one-second frame speed for one minute, to obtain the lesion site and its symmetrical part of the arterial perfusion series of images, at this time visible aorta and two The arteries were successively imaged, and the soft tissue contours were gradually displayed. Not suitable for the crowd There are no obvious contraindications. Adverse reactions and risks May cause an infection.