心电标记回顾性肺动脉多层螺旋CT血管造影术(附5例肺动脉栓塞)

目的　探讨肺动脉多层螺旋CT(MSCT)心电标记回顾性成像技术及临床应用意义。资料与方法　 4 5例胸痛患者行MSCT检查 ,用心电标记回顾性重建和常规非心电标记后处理 ,比较两者成像效果。结果　心电标记回顾性重建容积重建 (VR)图像较常规重建图像伪影明显减少 ,无伪影和轻度伪影图像占 5 3% ,而常规重建图像仅为 2 0 % ,两者差异有统计学意义 (P <0 .0 1) ;4 0例肺动脉MSCT未见异常 ,5例 (11% )检出肺动脉栓塞 ,其中 2例为中央型 ,3例为周围型。结论　心电标记回顾性肺动脉MSCT血管造影术图像纵向空间分辨率高 ,可作为肺动脉(包括肺栓塞 )检查的首选非创伤性检查方法

Retrospectively ECG-tagged MSCT Pulmonary Angiography:Technique and Clinical Application

Objective To discuss the technique and clinical application of retrospectively ECG tagged multislice CT (MSCT) pulmonary angiography.Materials and Methods MSCT was carried out in 45 patients with chest pain. The images were reconstructed with retrospectively ECG tagged and conventional technique, respectively. The image quality between two techniques was compared. Results Retrospectively ECG tagged images showed less artifacts than conventional images. Images with free or less artifacts in ECG tagged and conventional images accounted for 53% and 20% (P<0.01), respectively. Of 45 patients, normal MSCT pulmonary angiographic finding was seen in 40 and pulmonary embolism was found in 5 (11%), of which central type and peripheral type was respectively seen in 2 and 3. Conclusion Retrospectively ECG tagged MSCT pulmonary angiography provides high longitudinal resolution, thus, it should be regarded as the exam of first choice for pulmonary artery lesions, including pulmonary embolism.