摘要
目的探讨直径>3cm周围型肺癌螺旋CT动态增强扫描的血流动力学特点。材料与方法 63例直径>3cm胸部孤立性病灶(其中50例肺癌、10例炎性病灶及3例胸腺瘤病例)行定点层面螺旋CT动态增强扫描,绘出病灶增强时间-密度曲线(TAC),计算病灶最大增强线性斜率(SS)及血流灌注量(BP)。结果直径>3cm肺癌TAC表现为起始阶段曲线逐步上升,约60秒上升至峰值,然后缓慢下降。肺炎性病灶TAC表现为曲线起始段即呈快速上升,然后在上升至峰值的过程中出现少许的波动,120秒达峰值,然后下降。良性胸腺瘤的动态扫描密度变化较小,曲线较平稳。肺癌的平均SS及BP分别为4.91±4.68%/s,1.18±0.74ml/min.ml。肺炎性病灶的平均SS及BP分别为7.92±6.77%/s,1.90±0.97ml/min.ml,良性胸腺瘤的平均SS及BP分别为1.19±0.85%/s,BP为0.19±0.07ml/min.ml。结论螺旋CT动态增强扫描能反映直径>3cm周围型肺癌血流动力学特点,对其诊断与鉴别诊断有较大的临床价值。
Objective To discuss the feature of hemodynamics of peripheral pulmonary carcinoma （diamete〉3cm） by contrast enhanced spiral CT.Meterials and Methods 63 cases with single focuses in lung（diameter〉3cm,50 cases with lung cancer,10 cases with inflammatory lesions and 3 cases with thymus tumor） were performed with contrast enhanced spiral CT.The patterns of time-attenuation curve（TAC）ere darwn,Steeps slope（SS） and blood perfusion（BP） wre caluated.Results The main pattern of TAC of pulmonary carcinoma shoewd a slowed rise ta the beginning and rise to the peal heeghi at about 60s, and then fell slowly The main pattern of TAC of pulmonary inflammatoy nodluls shoeed a rapid rise at the beginng and a little fulutatao during the rise to peal smioot.The AA ,BoP of pulmonaty carcinoma ere 4.91±4.68% and 1.185±0.74%ml/min.ml.The SS,BP of inflammatory nodules erer7.92%±6.77%/s and 1.90±0.97%ml/min.ml Conclusion Contarast enhanced sporal VT could provide hemodynamic information of peripheral pulmonary carcinoma（diameter3cm） adn has important clinical value in the diagnosis and treatment of pulmonary carcinoma.
出处
《中国CT和MRI杂志》
2014年第2期52-55,共4页
Chinese Journal of CT and MRI
关键词
肺癌
血流
螺旋CT
动态增强
Puhnonary Carcinoma Blood Flow Sporal CT Dynamic Contrast Enhancement
