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64层螺旋 CT 三期增强扫描对胃癌转移性淋巴结的诊断价值

Journal of Practical Radiology(2014)

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Abstract
目的:探讨64层螺旋 CT(64-MSCT)三期增强扫描对胃癌转移性淋巴结的诊断价值。方法对30例胃癌患者行64-MSCT 平扫及三期增强扫描,分析胃周转移性淋巴结相关参数。结果判断胃周淋巴结是否转移的参数为:①淋巴结短径≥6 mm;②淋巴结短长径比≥0.6;③淋巴结门脉期 CT 值≥65 HU;④淋巴结门脉期与平扫期 CT 值差≥35 HU。①、②2项参数联合诊断的灵敏度为90.5%,特异度为29.0%;①、②、③3项参数联合诊断的灵敏度为98.2%,特异度为19.4%;4项参数联合诊断的灵敏度为99.7%,特异度为13.2%。另外,淋巴结的形态符合环形强化或粘连成团之一者,亦考虑为转移性淋巴结。结论64-MSCT 三期增强扫描综合应用淋巴结的各项参数,可对胃癌周围淋巴结是否转移做出比较可靠的诊断,具有快速、无创伤、灵敏度较高的特点。
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Key words
computed tomography,gastric cancer,lymph nodes
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