MSCT胸部血管成像不同扫描方案的应用价值

The value of different scan protocol in the thoracic MSCTA

目的:探讨MSCT胸部血管成像不同扫描方案的应用价值。方法:临床怀疑胸部血管病变需做CTA检查的患者共90例,分成A、B、C三组,每组各30例。A组为肺动脉阈值触发扫描方案。B组为改良肺动脉阈值触发扫描。C组为主动脉阈值触发扫描方案。结果:肺动脉CT值A组和C组、B组和C组差异有统计学意义(P<0.01),A组与B组差异无统计学意义。降主动脉的CT值:A组与B组、A组与C组、B组与C组差异有统计学意义(P<0.01)。结论:A组适用于:咯血,或者无咯血,但肺部平扫大片实变段以上蜂窝肺的患者;B组适用于:无咯血,肺部平扫两肺无不张实变、无蜂窝肺的患者,用于排除有无肺动脉栓塞;C组适用于咯血、支气管动脉扩张的患者。根据临床提供的病史和检查目的选择正确的扫描方案,能更好地显示病变和提高诊断的准确性。

Objective：To evaluate different scan protocol in the thoracic MSCTA. Methods：90 patients suspected clinically as vascular lesions accepting thoracic CTA scanning were divided equally into A, B, C groups. Group A：the pulmonary artery threshold trigger scanning. Group B：the improvement of pulmonary artery threshold trigger scanning. Group C：the standard of aortic threshold trigger scanning solutions. Results：The difference of pulmonary artery CT values in group A and group C, group B and group C was statistically significant, respectively （ P〈0. 01 ） , but there is no statistically significant in Group A and group B. The descending aorta CT value in Group C was higher than that of group A and B, the differences was statistically significant. The difference of descending aorta CT values in group A and group B, group A and group C, group B and group C, was statistically significant respectively （P〈0.001）. Conclusion：Group A applies to the patients with hemoptysis, no hemoptysis but the lung is scan large pieces of honeycombing and the pulmonary consolidation occur in segmental level or above. Group B applies to the patients with no hemoptysis, no pulmonary consolidation or atelectasis, no honeycomb lung, and exclude pulmonary embolism. Group C is suitable for the patients with hemoptysis or bronchial artery expansion. According to the clinical history and examination, the correct scan protocol can display the lesion better and improve diagnostic accuracy.