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| Study on the Required Theoretical Amounts of 18F-FDG when Different Grouping Methods were Applied During PET-CT Examination |
| ZHANG Hong-yu1, ZHANG Zhong-tai1, LI Ying-xin2, XU Shu-wei1, CUI Jie1, GUO Fang1 |
1. PET/CT centre of Shanxi Province Tumor Hospital, Taiyuan 030013 China;
2. Institute of Biomedical Engineering, Chinese Academy of Medical Science-Peking Union Medical College, Tianjin 300192 China |
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Abstract Objective To explore one grouping method which can reduce the amount of radiopharmaceutical 18F-FDG, when PET-CT examinations were performed without image losses of diagnostic utility. Methods 12 patients were divided into 12, 6, 4, 3 groups by method A, B, C, D. The required theoretical amounts of 18F-FDG for every patient were calculated and analyzed. Results The experiments showed that the required theoretical amounts for method A (1 patient in each group, injection interval, 20 minutes) was at maximum, method D was at least. Compared with method A, the required theoretical amounts for method B (2 patients in each group, injection interval, 40 minutes), C (3 patients in each group, injection interval, 60 minutes), D (4 patients in each group, injection interval, 80 minutes) decreased 5.0%, 9.4%, 14.0%, respectively. Conclusion The results showed that Method C is the best choice when PET-CT examinations were performed without image losses of diagnostic utility, and it can reduce the operating cost and operator radiation, so it was recommended in practical application.
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Received: 24 March 2013
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