论文部分内容阅读
观察分析了１１４例患者肺后前（ＰＡ）位相右上纵隔淋巴结肿大的征象与ＣＴ所见的关系。淋巴结正常５８例，增大（直径＞１０ｍｍ）５６例。以下６项指标的准确性分别为：右气管旁线（ＲＰＳ）增宽８１％，其边波浪状６７％，奇静脉球增大６７．７％，上腔静脉（ＳＶＣ）轮廓凸起６８．２％，区密度增高７１．８％，ＳＶＣ外缘至气管内壁的距离增宽（＞２．２ｃｍ）６０．７％。若当上述６个征象中至少一个出现时定为阳性，肺ＰＡ位相发现淋巴结肿大４４例，敏感性最高，为８４．６％，特异性７７．８％，准确性８１．１％。淋巴结肿大组上述征象的阳性率明显高于正常组（ｘ￣２检验，Ｐ＜０．０１）。ＣＴ示肿大淋巴结在气管前、前外、外侧及后方４个位置中，好发于气管前外侧，这可解释肺后前位相的表现。
The relationship between CT findings and the signs of right upper mediastinal lymph nodes in 114 patients with posterior pulmonary artery (PA) phase was observed and analyzed. Normal lymph nodes in 58 cases, increased (diameter> 10mm) in 56 cases. Accuracy of the following six indicators were: 81% widening of right tracheal parataxis (RPS), 67% wavy side, 67.7% increase of azygos vein, 68 contour of superior vena cava (SVC). 2% and the area density increased by 71.8%. The distance from the outer edge of SVC to the tracheal wall was widened (> 2.2cm) 60.7%. If at least one of the above six signs appeared to be positive, 44 cases of lymph node enlargement were found in lung PA phase, with the highest sensitivity of 84.6%, specificity of 77.8% and accuracy of 81.1%. The positive rate of lymph node enlargement group was significantly higher than the normal group (x ~ 2 test, P <0.01). CT showed swollen lymph nodes in the trachea anterior, anterolateral, lateral and posterior 4 locations, occur in the anterolateral trachea, which can explain the performance of the anterior posterior phase of the lung.