目的探讨脑功能区胶质瘤切除术应用术中磁共振成像(intraoperative magnetic resonance imaging,iMRI)联合神经电生理监测对脑功能区的保护作用。方法2022年6-12月吉林大学第一医院诊治脑功能区胶质瘤患者26例,均行手术治疗。术前行多模...目的探讨脑功能区胶质瘤切除术应用术中磁共振成像(intraoperative magnetic resonance imaging,iMRI)联合神经电生理监测对脑功能区的保护作用。方法2022年6-12月吉林大学第一医院诊治脑功能区胶质瘤患者26例,均行手术治疗。术前行多模态MRI检查,图像融合后导入神经导航系统,拟定手术切口及入路。全身麻醉下开颅,术中唤醒麻醉行皮层/皮层下直接电刺激定位运动、语言和感觉区皮层及皮下通路后切除肿瘤,肿瘤切除满意、脑移位明显、肿瘤边缘达到电生理预警(<5 mm)时恢复全身麻醉行iMRI检查判断肿瘤残留情况。如发现肿瘤残留,将残留肿瘤重新标记并投射在显微镜下切除残留肿瘤至满意,然后再次行皮层下电刺激确定弓状束、锥体束的完整性。术后常规给予降颅压、营养神经及对症治疗,术后组织病理证实高级别胶质瘤患者于术后2~3周行替莫唑胺同步放化疗。记录术中iMRI显示的肿瘤全切除、次全切除率;记录术后并发症发生情况;比较术前及术后1、3个月KPS评分;随访至2023年4月,行MRI检查观察肿瘤复发情况。结果(1)26例中首次iMRI显示肿瘤全切20例,6例肿瘤残留者二次切除,再次iMRI显示4例肿瘤全切、2例肿瘤次全切除,首次肿瘤全切率为76.9%(20/26),再次肿瘤全切率为92.3%(24/26)。(2)术后发生一过性语言加重3例,运动障碍加重5例,癫痫发作2例,给予尼莫地平、甲泼尼龙、甘露醇及丙戊酸钠治疗后逐渐恢复,无感染、颅内出血、癫痫持续状态及死亡发生。(3)随访至2023年4月,26例肿瘤均未复发。术前[(83.02±4.76)分]及术后1、3个月KPS评分[(90.31±5.76)、(95.23±6.71)分]比较差异有统计学意义(F=4.845,P=0.010),术后1、3个月KPS评分均高于术前(t=4.975,P<0.001;t=7.568,P<0.001)。结论脑功能区胶质瘤切除术应用iMRI联合神经电生理监测可在保护神经功能的前提下最大化切除肿瘤,高级别胶质瘤患者展开更多
High-quality large 1T phase of TiX_(2)(X = Te, Se, and S) single crystals have been grown by chemical vapor transport using iodine as a transport agent. The samples are characterized by compositional and structural an...High-quality large 1T phase of TiX_(2)(X = Te, Se, and S) single crystals have been grown by chemical vapor transport using iodine as a transport agent. The samples are characterized by compositional and structural analyses, and their properties are investigated by Raman spectroscopy. Several phonon modes have been observed, including the widely reported A_(1g) and E_(8) modes, the rarely reported E_(u) mode(-83 cm^(-1) for TiTe_(2), and -185 cm^(-1)for TiS_(2)), and even the unexpected K mode(-85 cm^(-1)) of TiTe_(2). Most phonons harden with the decrease of temperature, except that the K mode of TiTe_(2) and the E_(u) and “A_(2u)/Sh” modes of TiS_(2) soften with the decrease of temperature. In addition, we also found phonon changes in TiSe_(2) that may be related to charge density wave phase transition. Our results on TiX_(2) phonons will help to understand their charge density wave and superconductivity.展开更多
We systemically investigate the nature of Ce 4f electrons in structurally layered heavy-fermion compounds Ce_(m)M_(n)In_(3m+2n)(with M=Co,Rh,Ir,and Pt,m=1,2,n=0–2),at low temperature using on-resonance angle-resolved...We systemically investigate the nature of Ce 4f electrons in structurally layered heavy-fermion compounds Ce_(m)M_(n)In_(3m+2n)(with M=Co,Rh,Ir,and Pt,m=1,2,n=0–2),at low temperature using on-resonance angle-resolved photoemission spectroscopy.Three heavy quasiparticle bands f^(0),f^(1/7/2)and f^(1/5/2),are observed in all compounds,whereas their intensities and energy locations vary greatly with materials.The strong f0 states imply that the localized electron behavior dominates the Ce 4f states.The Ce 4f electrons are partially hybridized with the conduction electrons,making them have the dual nature of localization and itinerancy.Our quantitative comparison reveals that the f^(1/5/2)–f^(0)intensity ratio is more suitable to reflect the 4f-state hybridization strength.展开更多
文摘目的探讨脑功能区胶质瘤切除术应用术中磁共振成像(intraoperative magnetic resonance imaging,iMRI)联合神经电生理监测对脑功能区的保护作用。方法2022年6-12月吉林大学第一医院诊治脑功能区胶质瘤患者26例,均行手术治疗。术前行多模态MRI检查,图像融合后导入神经导航系统,拟定手术切口及入路。全身麻醉下开颅,术中唤醒麻醉行皮层/皮层下直接电刺激定位运动、语言和感觉区皮层及皮下通路后切除肿瘤,肿瘤切除满意、脑移位明显、肿瘤边缘达到电生理预警(<5 mm)时恢复全身麻醉行iMRI检查判断肿瘤残留情况。如发现肿瘤残留,将残留肿瘤重新标记并投射在显微镜下切除残留肿瘤至满意,然后再次行皮层下电刺激确定弓状束、锥体束的完整性。术后常规给予降颅压、营养神经及对症治疗,术后组织病理证实高级别胶质瘤患者于术后2~3周行替莫唑胺同步放化疗。记录术中iMRI显示的肿瘤全切除、次全切除率;记录术后并发症发生情况;比较术前及术后1、3个月KPS评分;随访至2023年4月,行MRI检查观察肿瘤复发情况。结果(1)26例中首次iMRI显示肿瘤全切20例,6例肿瘤残留者二次切除,再次iMRI显示4例肿瘤全切、2例肿瘤次全切除,首次肿瘤全切率为76.9%(20/26),再次肿瘤全切率为92.3%(24/26)。(2)术后发生一过性语言加重3例,运动障碍加重5例,癫痫发作2例,给予尼莫地平、甲泼尼龙、甘露醇及丙戊酸钠治疗后逐渐恢复,无感染、颅内出血、癫痫持续状态及死亡发生。(3)随访至2023年4月,26例肿瘤均未复发。术前[(83.02±4.76)分]及术后1、3个月KPS评分[(90.31±5.76)、(95.23±6.71)分]比较差异有统计学意义(F=4.845,P=0.010),术后1、3个月KPS评分均高于术前(t=4.975,P<0.001;t=7.568,P<0.001)。结论脑功能区胶质瘤切除术应用iMRI联合神经电生理监测可在保护神经功能的前提下最大化切除肿瘤,高级别胶质瘤患者
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 12074436 and U1930116)the Innovation-driven Plan in Central South University (Grant No. 2016CXS032)。
文摘High-quality large 1T phase of TiX_(2)(X = Te, Se, and S) single crystals have been grown by chemical vapor transport using iodine as a transport agent. The samples are characterized by compositional and structural analyses, and their properties are investigated by Raman spectroscopy. Several phonon modes have been observed, including the widely reported A_(1g) and E_(8) modes, the rarely reported E_(u) mode(-83 cm^(-1) for TiTe_(2), and -185 cm^(-1)for TiS_(2)), and even the unexpected K mode(-85 cm^(-1)) of TiTe_(2). Most phonons harden with the decrease of temperature, except that the K mode of TiTe_(2) and the E_(u) and “A_(2u)/Sh” modes of TiS_(2) soften with the decrease of temperature. In addition, we also found phonon changes in TiSe_(2) that may be related to charge density wave phase transition. Our results on TiX_(2) phonons will help to understand their charge density wave and superconductivity.
基金Supported by the National Natural Science Foundation of China (Grant Nos. 12074436 and 11574402)the Innovation-Driven Plan in Central South University (Grant No. 2016CXS032)+7 种基金support through the Swedish Research Council (VR) and the Swedish National Infrastructure for Computing (SNIC),for computing time on computer cluster Triolith at the NSC center Link?ping (supported by VR Grant No. 2018-05973)the support from the Swedish Research Council (VR) through a Starting Grant (No. Dnr. 2017-05078)support from the Swedish Research Council(VR)the Knut and Alice Wallenberg foundationsupported by a Marie Sklodowska-Curie Action,International Career Grant through the European Commission and Swedish Research Council (VR)(Grant No. INCA-2014-6426)a VR neutron project (Grant No. BIFROST, Dnr. 2016-06955)granted by the Carl Tryggers Foundation for Scientific Research (Grant Nos. CTS-16:324 and CTS-17:325)the auspices of the U.S. Department of Energy,Office of Basic Energy Sciences,Division of Materials Sciences and Engineering
文摘We systemically investigate the nature of Ce 4f electrons in structurally layered heavy-fermion compounds Ce_(m)M_(n)In_(3m+2n)(with M=Co,Rh,Ir,and Pt,m=1,2,n=0–2),at low temperature using on-resonance angle-resolved photoemission spectroscopy.Three heavy quasiparticle bands f^(0),f^(1/7/2)and f^(1/5/2),are observed in all compounds,whereas their intensities and energy locations vary greatly with materials.The strong f0 states imply that the localized electron behavior dominates the Ce 4f states.The Ce 4f electrons are partially hybridized with the conduction electrons,making them have the dual nature of localization and itinerancy.Our quantitative comparison reveals that the f^(1/5/2)–f^(0)intensity ratio is more suitable to reflect the 4f-state hybridization strength.
