胸部计算机放射摄影术与传统胸片在肺癌诊断中的对比研究

目的　研究胸部计算机放射摄影 (CR)术在肺癌诊断中的价值。方法　经手术病理证实的肺癌 5 6例 ,其中中央型肺癌3 4例 ,周围型肺癌 2 2例。 4种胸部CR图像 :平片CR( plainCR)、宽幅高频响应CR(wideCR )、高频响应CR(HE -CR )、低频响应CR (LE -CR) ;2种胸部CR体层摄影 :平片CR体层摄影 (plainCR -TOMO)、高频CR体层摄影 (HE -CR -TOMO) ;分别与传统胸片及传统体层摄影在正常结构及异常阴影的显示进行对比。结果　①正常结构的观测 :除wideCR、HE -CR对右下肺动脉的显示不如常规X线 (CXR)外 ,其余项目的各种CR图像均不同程度地优于CXR。体层摄影 :所有观测项目 ,CR体层摄影均优于CXR体层摄影。②异常阴影的观测 :中央型肺癌 ,PlainCR与LE -CR对所有观测项目的显示均优于CXR ;wideCR对受累支气管的显示优于CXR ,而对肿块内部密度分布及周围血管影的显示与CXR相同 ,对肺门肿块边缘的显示不如CXR。HE -CR所有观测项目均不如CXR。周围型肺癌 ,plainCR、LE -CR对肿块边缘特征及空洞的显示优于CXR ,而对密度分布的显示与CXR相同 ;wideCR对肿块边缘特征的显示不如CXR ;HE -CR对所有观测项目的显示均不如CXR。体层摄影 :PlainCR -TOMO及HE-CR -TOMO均优于CXR体层摄影。结论　通过对胸部正常结构及异常阴影的CR与C

Comparative Study on Computed Radiogram (CR) and Conventional Chest Film in Diagnosing Lung Cancer

Objective To determine the efficacy of computed radiogram (CR) of chest in the diagnosis of pulmonary carcinoma.Methods There were 56 cases of pulmonary carcinoma confirmed by pathology including 34 cases of central pulmonary carcinoma and 22 cases of periphral pulmonary carcinoma in this paper.Four kinds of chest CR images (plain CR,wide CR,HE-CR and LE-CR) and two kinds of chest CR tomogmphic images (plain CR tomogram and HE-CR) were compared with conventional X-ray (CXR) and conventional tomogram (CTomo)respectively in showing normal structures and abnormal shadowes tomogram.Results The normal structure were displayed more clearly by CR than by CXR,except wide CR and HE-CR in showing right inferior pulmonary artery.The central pulmonary carcinoma was displayed more clearly by CR and LE-CR than by CRX in all aspects.The airways were involved displayed much more clearly by wide CR than by CXR.The display of peripheral vessels and inside densiy of neoplasm was similar on wide CR and CXR films,but the mass margins were abscure on wide CR.HE-CR displayed less clearly than CRX in all aspects.In the peripheral lung carcinoma,plain CR and LE-CR played the better in display of neoplasma margin and cavity in tumor than CXR did, but CXR displayed the margin clearly than wide CR did.HE-CR displayed all of the signs less clearly than CXR did. The indexes displayed by CR tomo were all bettre than that done by CXR tomo.Conclusion All kinds of CR (including CR tomo) images of chest have advantages in displaying normal strcture and neoplasma signs, versus CXR and CXR tomo images. Synthesizing the adventages of various CR(including CR tomo) images,the observator can find more signs to improve the accuracy of diagnosis of pulmonary carcinoma.