螺旋CT多平面重组和三维成像技术在腹膜后原发肿瘤诊断中的应用

目的　评价螺旋CT对腹膜后原发肿瘤的诊断价值。方法　对 3 3例经病理证实的腹膜后原发肿瘤螺旋CT平扫、增强及多平面重组和 3D成像资料进行研究。结果　 3 3例腹膜后原发肿瘤螺旋CT定位正确 3 1例 (93 .9% ) ,区分良、恶性正确 2 7例(81.8% ) ,组织类型估计正确 11例 (3 3 .3 % )。MPR和 3D成像显示肿瘤和周围器官的空间关系及对周围器官的侵犯较直观、准确。结论　螺旋CT对腹膜后原发肿瘤定位诊断有较高价值 ,对定性诊断有较大帮助 ,对病理类型估计有一定限度 ,MPR和 3D成像对评价肿瘤对周围器官的侵犯及其可切除性有较大应用价值

The Application of Multiplanar Reformation(MPR) and Three Dimensional Reconstruction(3D) of Spiral CT in Diagnosis of Primary Retroperitoneal Neoplasms

Objective To evaluate the diagnostic value of primary retroperitoneal neoplasm (PRN) with spiral computed tomography.Methods The spiral CT appearances including pre-and postcontrast scans,multiplanar reformation(MPR)and three dimensional reconstruction(3D) in 33 cases with paimany retroperitoneal neoplasms confirmed by pathology were analysed.Results Of 33 cases,the lesions localized by SCT was correctly in 31(93.9%).The nature of malignant and benign tumors were correctly diagnosed with SCT in 27(81.8%) while the histologic types of tumor were correctly evaluated in 11(33.3%).MPR and 3D contributed to the preoperative evaluation.Conclusion SCT is reliable for localization of PRN and useful for the diagnosis of the natare of tumors but limited for the evaluation of histologic types.MPR and 3D are helpful for preoperative evaluation.