在过去20年，肝转移灶切除术逐渐成为改善转移性结肠癌病人预后的一种颇有前景的手段，在部分病例中，还提供了长期治愈的可能。为了使转移病灶切除术的安全性和疗效最大化，适宜的术前影像学检查必不可少。CT、MRI以及PET的发展不仅改善了对隐匿病灶的检出能力，同时也优化了解剖结构的定位。MRI在发现小于厘米级大小的肝转移病灶上更有优势。CT可作为一种筛检手段或在做术前计划中比较有用，例如估算残余肝脏容积或在术前为肝动脉灌注泵的安置确定动脉解剖位置。

Preoperative imaging evaluation for resectable colorectal liver metastasis        ZHONG Yun-shi*, ZENG Meng-su, XU Jian-min. *Institute of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
Corrsponding  author：XU Jian-min，E-mail：xujmin@yahoo.com.cn
Abstract    Over the past two decades, hepatic metastasectomy has emerged as a promising technique for improving survival in patients with metastatic colon cancer and in some cases providing long-term cure. Appropriate preoperative imaging could maximize the safety and efficacy of metastasectomy. Advancements in computed tomography (CT), magnetic resonance imaging (MRI) and positron emission tomography (PET) have led to improved detection of occult lesions and better definition of surgical anatomy. MRI excels at detection of subcentimeter liver metastases compared to CT and FDG-PET. CT may be useful as a screening modality or in preoperative planning such as volumetric estimation of the remnant liver size or in defining preoperative arterial anatomy for hepatic artery infusion pump placement.