目的　利用核素骶髂关节显像以及骶髂关节与骶骨的核素比值测定方法 ,探讨其在强直性脊柱炎 (AS)治疗监测中的价值。方法　 2 9例临床及CT确诊AS的病人 ,共 5 8个骶髂关节 ,先行核素骶髂关节显像及其核素比值测定 ,然后进行临床药物治疗。治疗后 2周再行同样的核素检查方法 ,观察其变化情况。结果　 5 8个骶髂关节中 ,有 5 1个骶髂关节示放射性核素呈不同程度浓聚 ,骶髂关节与骶骨放射性比值明显高于正常 ;2周后的检查所见其中原有异常的骶髂关节情况明显改善 ,有 5 1个骶髂关节与骶骨比值均有降低 ,其中 4 7个降至正常范围。两组比较差异有显著意义。结论　核素骶髂关节显像及其骶髂关节与骶骨核素比值测定 ,对骶髂关节炎的活动性监测具有重要的应用价值。 Objective To evaluate the value of radionuclide scintigraphy and radionuclide scintigraphy in the treatment of ankylosing spondylitis (AS). Methods Twenty-nine patients with clinical and CT confirmed AS were enrolled in this study. A total of 58 patients with sacroiliac joint, advanced radionuclide and its radionuclide imaging were selected for clinical drug treatment. Two weeks after treatment, the same method of radionuclide examination was used again to observe the changes. Results Among the 58 sacroiliac joints, 51 sacroiliac joints showed radionuclides with different degrees of concentration, and the ratio of sacroiliac joint to sacrum radioactivity was significantly higher than that of normal ones. The abnormalities were found after 2 weeks The condition of sacroiliac joint was obviously improved, and the ratio of 51 sacroiliac joints to sacrum was decreased, of which 47 fell to the normal range. The difference between the two groups was significant. Conclusion Radionuclide sacroiliac joint imaging and its ratio of sacroiliac joint to sacrum radionuclide are of great value in monitoring the activity of sacroiliitis.