Quantitative Dynamic Contrast-Enhanced Magnetic Resonance Imaging and Positron Emission Tomography (PET) for Distinguishing Metastatic Lymph Nodes from Nonmetastatic Among Patients with Rectal Cancer: A Systematic Review and Meta-Analysis

定量动态对比增强磁共振成像和正电子发射断层扫描（PET）在区分直肠癌患者转移性淋巴结和非转移性淋巴结中的应用：系统评价和荟萃分析