【摘要】 目的：比较分析Ｘ线平片、ＣＴ、发射计算体层摄影（ＥＣＴ）诊断骨转移瘤。材料与方法：５０例骨转移瘤均经手术病理证实，所有病例均先后作了Ｘ线摄影， ＣＴ及ＥＣＴ全身骨扫描。所用仪器为东芝５００ｍＡ Ｘ线机，东芝Ｌ３０００ ＣＴ扫描机及法国Ｓｏｐｈａ公司ＳＤＸ型发射计算体层摄影仪。结果：诊断转移性骨肿瘤灵敏度： ＥＣＴ（９７．２％）高于ＣＴ（６９．７％）、Ｘ线平片（５８．３％）；精确度： ＥＣＴ（８８．０％）亦高于ＣＴ（７８．０％）、Ｘ线平片（６８．０％）；假阴性率： ＥＣＴ比Ｘ线平片、ＣＴ均低的多；特异性：ＥＣＴ（６４．３％）明显低于ＣＴ（９４．１％）及Ｘ线平片（９２． ９％）；假阳性率：ＥＣＴ均比ＣＴ及Ｘ线平片高。ＥＣＴ的阴性预测值较高，而Ｘ线平片及ＣＴ扫描的阳性预测值较高。结论：ＥＣＴ能更早显示出病灶，是骨转移瘤较好的筛选方法。Ｘ线平片、ＣＴ检查特异性较强是骨转移瘤最基本的检查方法，三种方法具有互补作用。更多还原

【Abstract】 Objective: To Compare of X - ray, CT(Computed Tomography) and ECT(Emission Computed Tomography) in detecting metastases. Materials and Methods: Fifty patients with metastases who were verified by pathology had examinations of X - ray, CT scan and ECT whole - body - bone imaging. Toshiba 500mA X - ray machine, Toshiba L3000 CT and Sopha SDX SPECT were used. Results: The sensitivity of detecting metastases by ECT(97. 2% ) was higher than CT (69. 7% ) and X - ray(58. 3% ); the accuracy of ECT (88. 0% ) was higher than CT (78. 0% ) and X - ray(68. 0% ); the false negative of ECT was much lower than X - ray and CT; the specificity of ECT (64. 3% ) was significantly lower than CT(94.1% ) and X - ray(92. 9% ); the false positive of ECT was higher than CT and X - ray. The negative predictive value of ECT was higher; the positive predictive values of X -ray and CT scan were high- er. Conclusion: ECT can detect the early stage of metastases lesions and is a good routine screening method. X - ray and CT scan are of higher specificity and are the essential examination modality for detecting metastases. Three methods are complemented each other.更多还原