After drawbacks and shortages of using conventional kV or MV imaging mode were analyzed, this study proposes a new position verification mode with using the energy larger than 15 MeV or nominal accelerating potential ...After drawbacks and shortages of using conventional kV or MV imaging mode were analyzed, this study proposes a new position verification mode with using the energy larger than 15 MeV or nominal accelerating potential greater than 25 MV X-Ray. The new position verification mode is named HMV imaging mode. Along with the comparison of theoretical analyses, phantom experiments and clinical results to the original imaging modes, this report is going to demonstrate the HMV imaging mode is superior to traditional kV and MV imaging modes. This report first theoretically analyzed three main effects of X-ray interacting with medium by numerous equations and compared their mass attenuation coefficient with different types of tissue. X-ray irradiated on a “Catphan 500” cylinder phantom with different energies to verify these theoretical results. Furthermore, based on phantom experiments’ results, we have done numerous clinical trials and comparisons with patient’s clinical results. The theoretical and experimental results illustrate that the scanned images from HMV mode have a good quality and have ability to identify different tissue components clearly. HMV imaging mode overcomes drawbacks of position verification from both kV and MV level imaging mode as well as keeping advantages of kV and MV imaging mode. The result indicates that HMV is a good position verification mode in radiotherapy.展开更多
目的探讨妊娠合并急性胰腺炎(acute pancreatitis in pregnancy,APIP)对妊娠结局的影响因素。方法回顾分析2001年1月至2017年1月于中山大学附属第一医院确诊的34例APIP患者的临床资料,并根据分级标准将其分为轻度急性胰腺炎(MAP组23例)...目的探讨妊娠合并急性胰腺炎(acute pancreatitis in pregnancy,APIP)对妊娠结局的影响因素。方法回顾分析2001年1月至2017年1月于中山大学附属第一医院确诊的34例APIP患者的临床资料,并根据分级标准将其分为轻度急性胰腺炎(MAP组23例)和重度急性胰腺炎(SAP组11例),比较两组患者的一般资料、临床表现、诊疗措施及妊娠结局。结果两组患者中高脂血症[SAP组(7/11例)和MAP组(4/23例),P=0.016],新生儿窒息发生率[SAP组(4/11例)和MAP组(1/23例),P=0.038)],分娩孕周[SAP组(32.7±5.6)周和MAP组(37.0±3.8)周,P=0.035];两组患者其余指标未发现统计学差异。结论甘油三酯或胆固醇增高与SAP有关,SAP病情危重,严重损害母胎健康,因此妊娠期应加强对血脂水平的监控。展开更多
基金supported by the National Natural Science Foundation of China(U22A20561 and 41922005)the Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0202)+3 种基金the National Key Research and Development Program of China(2022YFC3204100)the Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences Foundation(E1SL002)supported by the Tübitak Program BIDEB2232(Project 118C250)supported by a UK Research and Innovation(UKRI)Natural Environment Research Council(NERC)Independent Research Fellowship(NE/T011246/1)。
基金supported by the National Natural Science Foundation of China (U22A20561 and 41922005)the Tibetan Plateau Scientific Expedition and Research Program (2019QZKK0202)+4 种基金the Foundation of Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences (E1SL002)the Water Resource Science and Technology Project in Jiangsu Province (2020057)the Key Research and Development Program of Jiangsu Province (Social Development) (BE2022857)the TüBITAK BIDEB2232 Program (118C250)the UKRI Natural Environment Research Council (NERC) Independent Research Fellowship (NE/T011246/1)。
文摘After drawbacks and shortages of using conventional kV or MV imaging mode were analyzed, this study proposes a new position verification mode with using the energy larger than 15 MeV or nominal accelerating potential greater than 25 MV X-Ray. The new position verification mode is named HMV imaging mode. Along with the comparison of theoretical analyses, phantom experiments and clinical results to the original imaging modes, this report is going to demonstrate the HMV imaging mode is superior to traditional kV and MV imaging modes. This report first theoretically analyzed three main effects of X-ray interacting with medium by numerous equations and compared their mass attenuation coefficient with different types of tissue. X-ray irradiated on a “Catphan 500” cylinder phantom with different energies to verify these theoretical results. Furthermore, based on phantom experiments’ results, we have done numerous clinical trials and comparisons with patient’s clinical results. The theoretical and experimental results illustrate that the scanned images from HMV mode have a good quality and have ability to identify different tissue components clearly. HMV imaging mode overcomes drawbacks of position verification from both kV and MV level imaging mode as well as keeping advantages of kV and MV imaging mode. The result indicates that HMV is a good position verification mode in radiotherapy.
文摘目的探讨妊娠合并急性胰腺炎(acute pancreatitis in pregnancy,APIP)对妊娠结局的影响因素。方法回顾分析2001年1月至2017年1月于中山大学附属第一医院确诊的34例APIP患者的临床资料,并根据分级标准将其分为轻度急性胰腺炎(MAP组23例)和重度急性胰腺炎(SAP组11例),比较两组患者的一般资料、临床表现、诊疗措施及妊娠结局。结果两组患者中高脂血症[SAP组(7/11例)和MAP组(4/23例),P=0.016],新生儿窒息发生率[SAP组(4/11例)和MAP组(1/23例),P=0.038)],分娩孕周[SAP组(32.7±5.6)周和MAP组(37.0±3.8)周,P=0.035];两组患者其余指标未发现统计学差异。结论甘油三酯或胆固醇增高与SAP有关,SAP病情危重,严重损害母胎健康,因此妊娠期应加强对血脂水平的监控。
