摘要
目的:研究MSCT三期增强扫描对孤立性肺结节的诊断价值。方法:前瞻性对102例孤立性肺结节行 MSCT三期增强扫描。其中肺癌71例,良性病变31例。先进行对比剂预注射扫描,测得肺动脉和主动脉的对比剂峰值时间以确定肺动脉期和主动脉期的扫描延迟时间,延迟期时间定为3 min。5 mm层厚的图像用于CT值测量,1．25 mm层厚的图像用于多平面重组或容积再现重组以观察病灶血管。测量病灶的平扫CT值和三期增强扫描时CT净增值,观察各时相内病灶血管的显示情况。结果:良、恶性结节的肺动脉期、主动脉期和延迟期CT净增值比较,差异均有显著性意义 (F值分别为14．793、4．495和56．141,P值分别为<0．001、0．036和<0．001)。结论:多层螺旋CT三期增强扫描CT净增值协同肿瘤血管有助于良恶性孤立性肺结节的鉴别诊断。
Objective：To study the value of three-phase enhanced technique by multi-slice CT （MSCT） in the diagno sis of solitary pulmonary nodules（SPN）. Methods： A prospective study of three-phase enhanced technique by multi slice CT （MSCT） was undertaken in 102 patients with SPN. There were 71 cases with pulmonary carcinoma and 31 cases with be nign lesions proved by surgery and pathology. The peak density time of pulmonary artery and aorta was used as the delayed time for pulmonary phase and aortic phase, the delayed time was 3 min. Using 5 mm as the slice thickness to measure the CT value of the SPN; 1. 25 mm as the thickness collimation for multi planar reformation or volume rendering to display the tumor vessels. The CT value of the SPN in CT without enhancement as well as that in three-phase enhanced technique were measured,also the tumor vessels in different phases were studied. Results： The difference of net CT value between lung cancer and benign nodules in these three different phases were statistically significant（F= 14. 793,4. 495 and 56. 141, respectively ; P = 0. 000,0. 036 and 0. 000, respectively） . Conclusion ： Three-phase enhanced MSCT technique is helpful for the diagnosis and differential diagnosis of SPN.
出处
《放射学实践》
2006年第1期40-43,共4页
Radiologic Practice
关键词
体层摄影术
X线计算机
肺肿瘤
新生血管化
病理性
Tomography, X-ray computed
Pulmonary neoplasms
Neovascularization, pathologic
