Tan Cher Heng, Iyer Revathy
Cher Heng Tan, Department of Diagnostic Radiology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore.
World J Radiol. 2010 May 28;2(5):151-8. doi: 10.4329/wjr.v2.i5.151.
Computed tomography (CT) plays an important role in the management of colorectal cancer (CRC). The use of CT (colonography) as a screening tool for CRC has been validated and is expected to rise over time. The results of prior studies suggest that CT is suboptimal for assessment of local T stage and moderate for N stage disease. Recent advances in CT technology are expected to lead to some improvement in staging accuracy. At present, the main role of CT in pre-treatment imaging assessment lies in its use for the detection of distant metastases, especially in the liver. In a select group of patients, routine post-treatment surveillance with CT confers survival benefits. The role of CT for post-treatment assessment has been radically altered and improved with the advent of fusion positron emission tomography/CT. Perfusion CT shows promise as another functional imaging modality but further experience with this technique is necessary before it can be applied to routine clinical practice.
计算机断层扫描（CT）在结直肠癌（CRC）的管理中发挥着重要作用。CT（结肠成像）作为CRC筛查工具的应用已得到验证，并且预计随着时间推移其使用会增加。先前研究结果表明，CT在评估局部T分期方面欠佳，在评估N分期疾病方面表现中等。CT技术的最新进展有望在分期准确性方面带来一些改善。目前，CT在治疗前影像评估中的主要作用在于用于检测远处转移，尤其是在肝脏。在一组特定患者中，CT常规治疗后监测可带来生存获益。随着融合正电子发射断层扫描/CT的出现，CT在治疗后评估中的作用已发生根本性改变并得到改善。灌注CT作为另一种功能成像方式显示出前景，但在将该技术应用于常规临床实践之前，还需要更多经验。
