Abstract
Objective: We aimed to improve diagnostic accuracy of 18F- fluoro-2-deoxyglucose (FDG) PET/CT for gastric cancer with water gastric inflation. Materials and methods: 44 gastric cancer patients (M:F = 30:14, age ± std = 62.1 ± 14.5y) were enrolled before surgery. Fifty minutes after injection of FDG (0.14 mCi/kg body weight), whole body PET/CT was performed first and then regional PET/CT over gastric area was obtained 80 min post FDG injection after water gastric inflation. Diagnostic accuracies for loco-regional lesions were compared between whole body and regional PET/CT. Results: 48 primary tumors (23 EGC and 25 AGC) and 348 LN stations (61 metastatic and 287 benign) in 44 patients were investigated. Primary tumor sensitivity of whole body PET/CT (50% = 24/48) was significantly improved by regional PET/CT (75% = 36/48, p < 0.005). Sensitivity of whole body PET/CT (24.6% = 15/61) for LN metastasis was also significantly improved by regional PET/CT (36.1% = 22/61, p < 0.01), whereas specificity of whole body PET/CT (99.3% = 285/287) was not compromised by regional PET/CT (98.3% = 282/287, p > 0.05). Higher primary tumor FDG uptake in regional PET/CT indicated shorter progress-free survival (p = 0.0003). Conclusion: Diagnostic accuracy of whole body PET/CT for loco-regional disease of gastric cancer could be significantly improved by regional PET/CT after water gastric inflation and prognosis could be effectively predicted by primary tumor FDG uptake in regional PET/CT.
Original language | English |
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Pages (from-to) | 935-942 |
Number of pages | 8 |
Journal | European Journal of Radiology |
Volume | 82 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2013 |
Bibliographical note
Funding Information:This study was supported in part by a grant of the Korea Healthcare Technology R&D Project , Ministry of Health and Welfare ( A111627 ), and by grants from the National Research Foundation (NRF) , Ministry of Education, Science and Technology (MEST), ( 2012M2B2A9A02029612 and Basic Science Research Program 2012R1A1A2001060 ), Republic of Korea.
Keywords
- FDG
- Gastric cancer
- PET/CT
- Staging