Comparison between 11 C-methionine and 18F-FDG PET/CT in diagnosing residual or recurrent glioma
10.3760/cma.j.issn.0253-9780.2011.04.007
- VernacularTitle:11C-MET和18F-FDG PET/CT诊断胶质瘤术后残余或复发的比较
- Author:
Dong-li, LI
;
Yi-kai, XU
;
Quan-shi, WANG
;
Hu-bing, WU
;
Hong-sheng, LI
;
Qiao-yu, WANG
- Publication Type:Journal Article
- Keywords:
Glioma;
Neoplasm recurrence,local;
Tomography,emission-computed;
Tomography,X-ray computed;
Methionine;
Deoxyglucose
- From:Chinese Journal of Nuclear Medicine
2011;31(4):233-236
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the value of 11 C-methionine (MET) PET/CT for the diagnosis of residual or recurrent glioma in comparison to 18 F-FDG PET/CT. Methods Forty-six patients suspected of residual or recurrent glioma underwent both 11 C-MET and 18 F-FDG PET/CT within 5-day interval. The glioma was considered as positive on PET/CT images based on ( 1 ) visual judgment of higher tracer uptake compared with the normal gray matter; (2) semiquantitative analysis of tumor to contralateral normal gray matter (T/G) and contralateral normal white matter (T/W) ratios. The diagnosis was confirmed by stereotsctic biopsy or radiological findings of MRI or CT and clinical follow-up ( ＞6 months). The Chi-square test and paired t test were used for statistical analysis. Results Residual or recurrent glioma was confirmed in 36 patients. The sensitivity, specificity, accuracy of 11C-MET and 18F-FDG PET/CT were 94.4% (34/36) vs 47.2% (17/36), 90.0% (9/10) vs 100% (10/10), 93.5% (43/46) va 58.7% (27/46) (x2 =19. 429, 1. 053, 15. 294, P ＜0.001, ＞0.05, ＜0.001 ), respectively. The T/G and T/W ratios of residual/recurrent giloma by 11 C-MET were significantly higher than those by 18 F-FDG (T/G ratio: 1.68 ± 0.23 vs 1.13 ±0.51, t = 5. 877, P ＜ 0. 001; T/W ratio: 2.52 ± 0.28 vs 1.42 ± 0. 57, t = 10. 470, P ＜0. 001 ). Conclusion 11 C-MET PET/CT is more sensitive and accurate than 18 F-FDG PET/CT for the detection of residual or recurrent glioma.
