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首页> 外文期刊>Radiology >Detection of recurrent nasopharyngeal carcinoma: MR imaging versus CT.
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Detection of recurrent nasopharyngeal carcinoma: MR imaging versus CT.

机译：复发性鼻咽癌的检测：MR成像与CT对比。

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摘要

PURPOSE: To compare the use of magnetic resonance (MR) imaging and computed tomography (CT) in detection of recurrent nasopharyngeal carcinoma. MATERIALS AND METHODS: Forty-five sets of CT and MR images were obtained in 34 patients. The images were placed in three categories: (a) clinically or radiologically abnormal findings in patients who underwent biopsy (n = 16), (b) clinically normal and radiologically borderline findings in patients who were followed up clinically and radiologically (n = 10), and (c) clinically and radiologically normal findings in patients who were monitored only clinically (n = 19). All images were read by two observers independently. RESULTS: There were nine positive and seven negative biopsy results. All patients in the latter two categories had normal findings at followup. CT had a sensitivity of 45% and 67% and a specificity of 64% and 70% for each of the two observers. MR imaging had a sensitivity of 56% (for both observers) and a specificity of 78% and 83%. The kappa test for interobserver concordance was 0.53 for CT and 0.66 for MR imaging. CONCLUSION: Both modalities have relatively low sensitivity and moderate specificity in detection of tumor recurrence and in distinguishing recurrence from post-radiation therapy changes.
机译：目的：比较磁共振成像（MR）和计算机断层扫描（CT）在检测复发性鼻咽癌中的应用。材料与方法：在34例患者中获得了45套CT和MR图像。这些图像分为三类：（a）接受活检的患者的临床或放射学异常发现（n = 16），（b）接受临床和放射学的随访患者（n = 10）的临床正常和放射学边界发现。 ，以及（c）仅接受临床监测的患者（n = 19）的临床和放射学正常发现。所有图像均由两名观察员独立读取。结果：活检有9例阳性和7例阴性。后两类所有患者的随访均正常。对于两个观察者，CT的敏感性分别为45％和67％，特异性为64％和70％。 MR成像的灵敏度为56％（对于两个观察者而言），特异性为78％和83％。观察者间一致性的kappa检验CT值为0.53，MR成像值为0.66。结论：这两种方式在检测肿瘤复发以及从放射治疗后的变化中区分出复发方面均具有相对较低的敏感性和中等特异性。

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