99Tcm-MIBI双时相显像对继发性甲状旁腺功能亢进症定位诊断的价值

目的 探讨‰99m锝-甲氧基异丁基异腈(99Tcm-sestamibi,99Tcm-MIBI)双时相法平面显像及SPECT/CT断层显像对继发性甲状旁腺功能亢进症(secondary hyperparathyroidism,SHPT甲旁亢)临床应用价值,初步探讨SPECT/CT断层显像是否可以提高SHPT术前定位诊断的准确性.方法 采用99mTc-MIBI双时相法显像.31例患者中22例行平面显像,9例行平面及SPECT/CT断层显像,全部病例均经手术和病理检查证实.将每一患者延迟显像中甲状旁腺摄取的最高放射性比值(T/NT)与其近期全段甲状旁腺激素(intact parathyroid hormone,iPTH)水平及手术和病理结果 进行对照.结果 患者延迟显像中甲状旁腺摄取的最高T/NT值与其显像前iPTH值呈正相关(r=0.426,P<0.05),与其手术切除的相应甲状旁腺体积呈显著正相关(r=0.352,P<0.01).所有手术切除的甲状旁腺病理结果 均为增生.平面显像在经手术和病理检查证实的106枚功能亢进的甲状旁腺中检出了73枚,准确性为68.9%.SPECT/CT断层显像在经手术和病理检查证实的30枚功能亢进的甲状旁腺中检出了23枚,准确性为76.7%,这些患者的平面显像检出了19枚甲状旁腺,准确性为63.3%.SPECT/CT显像对于继发甲旁亢的增生甲状旁腺检出的准确性较高.结论 99Tcm-MIBl双时相显像能够估测甲状旁腺功能及其增生的程度,也是定位诊断SHPT的有效方法.SPECT/CT断层显像较单纯平面显像能发现更多功能增强的甲状旁腺,结合CT断层对于病灶的解剖定位更加准确,尤其是术后继发甲旁亢持续存在或复发需再次手术者,为手术治疗继发甲旁亢提供更多证据.

Value of dual-phase 99Tcm-MIBI scintigraphy and SPECT/CT in the localization diagnosis of secondary hyperparathyroidism

Objective To discuss the clinical value of dual-phase 99Tcm-sestamibi(99Tcm-MIBI) scintigraphy and SPECT/CT in secondary hyperparathyroidism,and to investigate the possibility of SPECT/CT for the accurate localization diagnosis of secondary hyperparathyroidism preoperatively.Methods Thirty-one patients underwent parathyroid imaging with double-phase 99Tcm-MIBI before surgery for hyperparathyroidism.Planar imaging was conducted in 22 patients,and planar and SPECT/CT imaging in 9 patients.The diagnosis of hyp...