定量动态增强MRI在软组织肿瘤诊断中的应用张雨1，季维娜1，安玉芬2，刘雅怡1，张晗1，郝大鹏1*1.青岛大学附属医院放射科，山东青岛266002；2.青岛大学附属医院病理科，山东青岛266002；*通讯作者郝大鹏 haodp__2009@16【基金项目】国家自然科学基金面上项目（81571673）【摘要】目的评估定量动态增强MRI（DCE-MRI）对软组织肿瘤良恶性的诊断价值。
资料与方法分析58例经病理证实的软组织肿瘤患者的DCE-MRI图像，其中良性24例、恶性34例。
选用3.0T磁共振3D VIBE序列。
根据病理诊断结果，将纳入的软组织肿瘤患者分为良性组与恶性组；以肿瘤同层面的正常肌肉组织为对照组。
定量分析使用双室模型，并获得容量转移常数（K trans）、速率常数（K ep）、血管外细胞外间隙容积分数（V e）。
分析定量参数K trans、K ep和V e在不同组间肿瘤组织与肌肉组织的差异；评估3种参数对肿瘤组织良恶性的诊断效能。
结果恶性组患者K trans及K ep均显著高于良性组，差异有统计学意义（P<0.001）；V e亦高于良性组，但差异无统计学意义（P>0.05）。
受试者工作特征曲线分析显示，K trans和K ep均具有鉴别肿瘤组织良恶性的效能，其中K trans的曲线下面积最大（0.852）。
良性组及恶性组肿瘤中，肿瘤组织K trans、K ep和V e与对照组比较，差异均有统计学意义（P<0.001）；肌肉组织与对照组比较，差异均无统计学意义（P>0.05）。
结论DCE-MRI的定量参数K trans、K ep具有区分良性和恶性软组织肿瘤的能力；V e用于诊断软组织肿瘤良恶性的价值有待进一步研究。
【关键词】软组织肿瘤；磁共振成像；图像增强；病理学，外科；诊断，鉴别【中图分类号】R738.6；R730.42 【DOI】10.3969/j.issn.1005-5185.2019.11.009Quantitative Dynamic Enhanced Magnetic Resonance Imaging in Diagnosis of Soft Tissue TumorsZHANG Yu1, JI Weina1, AN Yufen2, LIU Yayi1, ZHANG Han1, HAO Dapeng1*Department of Radiology, the Affiliated Hospital of Qingdao University, Qingdao 266002, China; *Address Correspondence to: HAO Dapeng; E-mail: haodp__2009@【Abstract】Purpose To evaluate the value of the quantitative dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) in diagnosis of benign and malignant soft tissue tumors. Materials and Methods DCE-MRI imaging of 58 patients with pathologically confirmed soft tissue tumors was analyzed, including 24 cases of benign tumors and 34 cases of malignant tumors. 3.0T MRI 3D volumetric interpolated breath-hold examination sequence was selected. Based on the pathological diagnosis results, the included patients with soft tissue tumors were divided into benign tumor group and malignant tumor group. The control group was the normal muscle tissue on the same layer of tumor. Quantitative analysis was conducted with the two-compartment model to obtain the volume transfer constant (K trans), rate constant (K ep) and extravascular extracellular volume fraction (V e). The difference of quantitative parameters of K trans, K ep and V e in tumor tissue and muscle tissue between different groups was analyzed; the diagnostic efficiency of the three parameters for benign and malignant tumor tissues was evaluated. Results The values of K trans and K ep were significantly higher in malignant tumors than in benign tumors and the difference was statistically significant (P<0.001); the values of V e also were higher in malignant tumors than in benign tumors but the difference was not statistically significant (P>0.05). ROC analysis results demonstrated the diagnostic ability of K trans and K ep to differentiate benign and malignant soft tissue tumors, K trans with the largest area under the curve (0.852). In tumors of the benign and malignant groups, the differences of K trans, K ep and V e of tumor tissue and their respective control groups were statistically significant (P<0.001). The differences between the muscle tissue and the control group was not statistically significant (P>0.05). Conclusion The quantitative parameters of DCE-MRI provide the ability to differentiate between benign and malignant soft tissue tumors. The value of V e in diagnosing benign and malignant soft tissue tumors needs further study.【Key words】Soft tissue neoplasms; Magnetic resonance imaging; Image enhancement; Pathology, surgical; Diagnosis, differential Chinese Journal of Medical Imaging, 2019, 27 (11): 834-838软组织肿瘤种类繁多，发病率较低，良性与恶性软组织肿瘤之间缺乏特征性的影像学表现[1-2]。
