目的:初步探讨螺旋CT增强双期扫描技术在胸部疾病诊断中的应用价值。方法:对100例胸部疾病患者行螺旋CT增强双期扫描(以2～4ml/s的速度注入对比剂),分别在23～28s(血管期)及90~120s(延迟期)行胸部螺旋扫描,观察病变与血管及病变强化情况。结果:血管期能清晰显示病变与血管的关系,延迟期能准确显示病变强化情况。结论:在胸部CT增强扫描中推荐采用双期扫描技术。 Objective: To investigate the value of dual-phase spiral CT in the diagnosis of chest diseases. Methods: One hundred patients with thoracic disease underwent spiral CT enhanced double-phase scanning (2 ~ 4ml / s injection of contrast agent), respectively, in 23 ~ 28s (vascular) and 90 ~ 120s , Observe the lesion and vascular and lesion enhancement. Results: The vascular stage can clearly show the relationship between the lesion and the blood vessel. The delay period can accurately show the enhancement of the lesion. Conclusion: Dual-phase scanning technique is recommended in chest CT scan.