多层螺旋CT后重组技术在肺隔离症诊断中的应用

Application of MSCT Postprocessing Techniques in the Diagnosis of Pulmonary Sequestration

目的探讨多层螺旋CT后重组技术在肺隔离症诊断中的应用价值。方法13例肺隔离症患者均行CT平扫及增强扫描,扫描后数据重组方法为容积再现(VR)、最大密度投影(MIP)、薄层最大密度投影(TSMIP),观察血管情况及肿块与供血动脉的关系。结果 13例肺隔离症患者12例为叶内型,1例为叶外型,左肺下叶后基底段10例,右肺下叶后基底段3例。囊性肿块6例,囊实质性肿块4例,实质性肿块2例,局部肺气肿、肺血管增多紊乱1例。13例患者共发现14支供血动脉,均发自胸主动脉(10支)、腹主动脉上段(2支)、腹腔干(1支)及肺动脉(1支),静脉引流均为肺静脉。多层螺旋CT重组技术可清楚显示肺隔离症肿块形态、血管及周围组织的关系。结论多层螺旋CT后重组技术可清楚显示肺隔离症肿块形态、血管及周围组织的关系,为肺隔离症术前评估提供重要的资料,可在临床推广应用。

Objective To assess the clinical value of MSCT postprocessing techniques in the diagnosis of pulmonary sequestration. Methods A total of 13 patients who had pulmonary sequestration underwent dual-phase CTA.All CT data were reconstructed with the postprocessing techniques including volume rendering（VR）,maximum intensity. projection（MIP） and thin-slice maxinmm intensity projection（TSMIP）.The relationship of tumor and feeding arteries as -well as the appearances of blood vessels were studied. ,Results Of the 13 patients with pulmonary sequestration, 14 aberrant supply arteriaes were found, which origined from the descending thoracic aorta in 10, superior segment of abdominal aorta in 2, celiac trunk in 1 and pulmonary artery in 1.All the anomalous venous were drainaged to the pulmonary venous system. MSCT postprocessing techniques can clearly show the tumor shape in various location, the relationship of the tumor with blood vessels and adjacent tissues and structures. Conclusion MSCT postprocessing techniques provided important information for the pre-operation evaluation of pulmonary sequestration, which worth recommending in clinical practice.