摘要
Abstract
Objective To evaluate the clinical value of 18F-FDG PET/CT delayed imaging after diuretic in the diagnosis of pelvic local recurrence of rectal cancer.Methods Clinical data of 54 patients undergoing radical resection of rectal cancer in our hospital from February 2013 to October 2015 were analyzed retrospectively.Patients were given CT scan and PET emission scan.Before the scan,1500 mL of 0.9％ sodium chloride solution was administrated through catheter,followed by injection of furosemide after 20 min of oral glucose and other bladder preparation.CT and PET image reconstruction were performed and the PET images were attenuated and corrected with CT images.CT and PET/CT fusion images were analyzed and the accuracy of 18F-FDG PET/CT and CT in the diagnosis of postoperative recurrence of rectal cancer was evaluated with the pathological findings as the reference.Results 49 out of 54 patients were pathologically confirmed as with pelvic local recurrence.The recurrence rate was 90.74％.The specificity and positive predictive value of delayed 18F-FDG PET/CT scan were 60％,28.57％,respectively and the corresponding figures for CT were 91.43％ and 96.08％,respectively,with no significant difference (P ＞ 0.05).The sensitivity,accuracy and negative predictive value of 18F-FDG PET/CT delayed imaging after diuretic were 100％,96.30％ and 100％ respectively,which were significantly higher than those of CT (P ＜ 0.05).Conclusion 18F-FDG PET/CT delayed imaging after diuretic can accurately diagnose pelvic local recurrence of rectal cancer.The diagnostic accuracy was higher than the traditional enhanced CT,with high application potential.关键词
直肠癌/18F-FDG PET/CT显像/CT/利尿/延迟扫描Key words
rectal cancer/18F-FDG PET/CT imaging/CT/diuretic/delayed scan分类
医药卫生
