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Enhanced Application of 18F-FDG PET/CT in Bladder Cancer by Adding Early Dynamic Acquisition to a Standard Delayed PET Protocol
- Enhanced Application of 18F-FDG PET/CT in Bladder Cancer by Adding Early Dynamic Acquisition to a Standard Delayed PET Protocol
- Yoon H.-J.; Yoo J.; Kim Y.; Lee D.H.; Kim B.S.
- Ewha Authors
- 이동현; 김범산; 윤혜전
- SCOPUS Author ID
- 이동현; 김범산; 윤혜전
- Issue Date
- Journal Title
- Clinical Nuclear Medicine
- vol. 42, no. 10, pp. 749 - 755
- 18F-FDG; bladder cancer; early dynamic PET/CT; tumor blood flow; urine activity
- SCIE; SCOPUS
- Purpose We investigated the value of early dynamic (ED) PET for the detection and characterization of bladder cancer. Methods Fifty-Two bladder cancer patients were prospectively enrolled. The study protocol was composed of ED, whole-body (WB, 60 minutes after injection), and additional delayed (AD, 120 minutes after injection) PET acquisition. Early dynamic PET was acquired for 10 minutes and reconstructed as 5 frames at 2-minute intervals. A focal radiotracer accumulation confined to the bladder wall was considered as PET positive and referred for further quantitative measurement. SUVmax on ED (1fSUVmax, 2fSUVmax, 3fSUVmax, 4fSUVmax, and 5fSUVmax for 5 frames), WB (WBSUVmax), and AD PET (ADSUVmax) were measured. PET results were correlated with bladder cancer pathology variables. Results The sensitivities of ED, WB, and AD PET for bladder cancer were 84.6%, 57.7%, and 61.2%, respectively. The sensitivity of ED PET was significantly higher than that of WB (P = 0.002) and AD PET (P = 0.008). On ED PET, 2fSUVmax was significantly correlated with muscle invasiveness, histological grade, and pathological tumor size (P = 0.018, P = 0.030, and P = 0.030). On WB and AD PET, only pathological tumor size showed significant positive correlation with WBSUVmax and ADSUVmax (P = 0.043 and P = 0.007). Conclusions Early dynamic PET can help to detect and characterize bladder cancer. © Wolters Kluwer Health, Inc. All rights reserved.
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