摘要
目的探讨胃癌淋巴结转移的螺旋CT特征。方法分析35例进展期胃癌淋巴结的螺旋CT影像特征,并与术后病理进行对照研究。结果螺旋CT共检出淋巴结379个,其中阳性淋巴结有173个(阳性率45.6%),阴性淋巴结有206个。以长径≥10mm为诊断阳性淋巴结标准,淋巴结阳性率达62.7%,淋巴结不规则的阳性率96.3%,淋巴结强化不均匀者阳性率89.4%,以平扫CT值≥25HU、动脉期CT值≥70HU、静脉期CT值≥80HU为诊断阳性淋巴结标准,淋巴结的阳性率达55.7%、56.3%及67.8%。结论螺旋CT对判断胃癌淋巴结转移有重要作用,采用淋巴结长径为10mm,结合淋巴结形态,密度差有助于提高螺旋CT对胃癌淋巴结转移的诊断水平。
Objective To study the characteristics of spiral computed tomography （SCT） in the diagnosis of lymph nodes metastases in gastric cancer. Methods The characteristics of spiral computed tomography （SCT） of metastatic lymph nodes in 35 gastric cancer patients were analyzed and compared with operation and pathology. Results A total amount of 379 lymph nodes （positive 173, negative 206） were detected by SCT and confirmed by pathology in metastasis-positive or metastasis-negative patients. The positive rate with diameter of lymph nodes≥ 10 mm is 62.7%. The positive rate with irregular shape and uneven enhancement lymph nodes were 96.3% and 89.4%. If the attenuation values, more than or equal to 25 HU in plain scan or 70 HU in arterial phase or 80 HU in venous phase, were used as the threshold to detect the metastasis-positive lymph nodes, the positive rate were 55.7%, 56.3%, 67.8% respectively. Conclusion SCT is valuable in judging the metastasis in gastric cancer. The reference of diameter ≥ 10mm, combining with the shape and the attenuation values can dramatically improve the diagnosis of lymph node metastasis in gastric cancer.
出处
《影像诊断与介入放射学》
2008年第2期62-64,共3页
Diagnostic Imaging & Interventional Radiology
关键词
胃癌
螺旋CT
淋巴结转移
Gastric cancer
Spiral computed tomography
Lymph node metastasis
