Abstract:The efficacy of colorectal cancer treatment is not very satisfactory. Conventional morphologic imagings are limited in the diagnosis and in the applications of multimodality treatment for colorectal cancer.¹⁸F-fluorodeoxyglucose PET-CT can play a pivotal role in detecting metabolism changes and in the localization of lesions concurrently. It is valuable in the assessment of responses to therapy, prediction of prognosis and selecting modality management and monitoring postoperative recurrence. The rightmoment and proper application of PET-CT can increase the therapeutic efficacy of colorectal cancer.

Key words:Colorectal carcinoma,Multimodality treatment,¹⁸F-FDG PET-CT