No. 1 Relationship Between Producer Services Developing Level and Urban Hierarchy ZHONG Yun, YAN Xiaopei Empirical Analysis of Xinjiang's Bilateral Trade: Gravity Model Approach CHEN Xuegang, YANG Zhaoping, LIU X...No. 1 Relationship Between Producer Services Developing Level and Urban Hierarchy ZHONG Yun, YAN Xiaopei Empirical Analysis of Xinjiang's Bilateral Trade: Gravity Model Approach CHEN Xuegang, YANG Zhaoping, LIU Xuling Rural-urban Migration, Rural Household Income and Local Geographical Contexts YANG Chunyue, LU Qi, XIE Lishuang Spatial Pattern and Influencing Factor of County-level Industrial Development in Liaoning Province of China GAO Xiaona, MA展开更多
Background: The PET/CT imaging studies have two doses components the dose from the PET radiopharmaceutical and the other from the low dose CT used for PET images attenuation correction. We have one PET/CT scanner at o...Background: The PET/CT imaging studies have two doses components the dose from the PET radiopharmaceutical and the other from the low dose CT used for PET images attenuation correction. We have one PET/CT scanner at our institution a Philips Time of Flight scanner. Our local patient’s radiation protection rules requires continuous assessment of radiation doses delivered to our patients. Purposes: The objectives of this study are to develop a weight- based facility DRLs for paediatric F-18-FDG PET-CT imaging for oncology in a large tertiary hospital and to determine whether the calculated DRLs compares with internationally published DRLs. Materials & Methods: Radiation dose data and patient demographics of two-hundreds and sixteen paediatric PET-CT oncology patients imaging procedures from one large tertiary hospital were selected and analysed in order to establish a facility paediatric DRLs. Statistical analysis was performed. Results: The PET dose reference levels ranged between [62 - 525] MBq of injected activity for a range of pediatric age groups. The CTDI<sub>vol</sub> values were between 3.5 and 16.5 mGy for all age groups. Comparison with current EANM and SNMMI recommendations of patient’s dose are discussed. Conclusion: Our pediatric PET/CT reference levels are higher than the ones reported internationally with notable variations. .展开更多
文摘No. 1 Relationship Between Producer Services Developing Level and Urban Hierarchy ZHONG Yun, YAN Xiaopei Empirical Analysis of Xinjiang's Bilateral Trade: Gravity Model Approach CHEN Xuegang, YANG Zhaoping, LIU Xuling Rural-urban Migration, Rural Household Income and Local Geographical Contexts YANG Chunyue, LU Qi, XIE Lishuang Spatial Pattern and Influencing Factor of County-level Industrial Development in Liaoning Province of China GAO Xiaona, MA
文摘Background: The PET/CT imaging studies have two doses components the dose from the PET radiopharmaceutical and the other from the low dose CT used for PET images attenuation correction. We have one PET/CT scanner at our institution a Philips Time of Flight scanner. Our local patient’s radiation protection rules requires continuous assessment of radiation doses delivered to our patients. Purposes: The objectives of this study are to develop a weight- based facility DRLs for paediatric F-18-FDG PET-CT imaging for oncology in a large tertiary hospital and to determine whether the calculated DRLs compares with internationally published DRLs. Materials & Methods: Radiation dose data and patient demographics of two-hundreds and sixteen paediatric PET-CT oncology patients imaging procedures from one large tertiary hospital were selected and analysed in order to establish a facility paediatric DRLs. Statistical analysis was performed. Results: The PET dose reference levels ranged between [62 - 525] MBq of injected activity for a range of pediatric age groups. The CTDI<sub>vol</sub> values were between 3.5 and 16.5 mGy for all age groups. Comparison with current EANM and SNMMI recommendations of patient’s dose are discussed. Conclusion: Our pediatric PET/CT reference levels are higher than the ones reported internationally with notable variations. .
