Objective:To study the diagnostic value of T2*-weighted first-pass perfusion imaging in breast tumors.Methods: We analyzed the magnetic resonance imaging(MRI)information along with the pathological and immunohistochem...Objective:To study the diagnostic value of T2*-weighted first-pass perfusion imaging in breast tumors.Methods: We analyzed the magnetic resonance imaging(MRI)information along with the pathological and immunohistochemistry re- sults.Magnetic resonance imaging was performed in 28 patients with breast tumor.The time to signal intensity curves were generated according to the T2*-weighted first-pass perfusion imaging.The curve’s maximal signal intensity drop rate and maximal signal intensity decrease time were analyzed and compared with the pathological diagnoses after surgery.Results: Malignant breast lesions showed higher maximal signal intensity drop rate(44.69%±17.07 vs.17.22%±7.49,P<0.001) than benign lesions,but there was no significant difference of maximal signal decrease time between those two lesions(23.94 s±4.92 vs.20.02 s±6.83,P>0.05).Conclusion:The T2*-weighted first-pass perfusion imaging has enough sensitivity and specificity in breast tumor diagnosis.展开更多
Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on ...Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York's Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations.展开更多
Your Excellency President Bassirou Diomaye Faye,Your Excellency President Mohamed Ould Cheikh El Ghazouani,Chairperson of the African Union(AU),Your Excellencies Heads of State and Government and Heads of Delegation,Y...Your Excellency President Bassirou Diomaye Faye,Your Excellency President Mohamed Ould Cheikh El Ghazouani,Chairperson of the African Union(AU),Your Excellencies Heads of State and Government and Heads of Delegation,Your Excellency Mr.Antonio Guterres,Secretary General of the United Nations,Your Excellency Mr.Moussa Faki Mahamat,Chairperson of the AUCommission,Friends and Distinguished Guests,Blossoms in spring turn into fruits in autumn,and a bumper harvest is the reward of hard work.In this season of harvest,I am delighted to gather together with so many old and new friends in Beijing to discuss grand plans for China-Africa friendship and cooperation in the new era.On behalf of the Chinese government and people,I extend a warm welcome to you all!展开更多
We,the Heads of State,Government and Delegations of the People's Republic of China and 53 African countries,and the Chairperson of the African Union Commission,gathered in China from September 4 to 6 for the 2024 ...We,the Heads of State,Government and Delegations of the People's Republic of China and 53 African countries,and the Chairperson of the African Union Commission,gathered in China from September 4 to 6 for the 2024 Beijing Summit of the Forum on China-Africa Cooperation(FOCAC).Under the theme“Joining Hands to Advance Modernization and Build a High-Level China-Africa Community with a Shared Future,”the Summit adopted by consensus the Beijing Declaration on Jointly Building an All-Weather China-Africa Community with a Shared Future for the NewEra.展开更多
基金a grant from the Medicine Scientific Development Foun-dation of Nanjing(No.zkx05021).
文摘Objective:To study the diagnostic value of T2*-weighted first-pass perfusion imaging in breast tumors.Methods: We analyzed the magnetic resonance imaging(MRI)information along with the pathological and immunohistochemistry re- sults.Magnetic resonance imaging was performed in 28 patients with breast tumor.The time to signal intensity curves were generated according to the T2*-weighted first-pass perfusion imaging.The curve’s maximal signal intensity drop rate and maximal signal intensity decrease time were analyzed and compared with the pathological diagnoses after surgery.Results: Malignant breast lesions showed higher maximal signal intensity drop rate(44.69%±17.07 vs.17.22%±7.49,P<0.001) than benign lesions,but there was no significant difference of maximal signal decrease time between those two lesions(23.94 s±4.92 vs.20.02 s±6.83,P>0.05).Conclusion:The T2*-weighted first-pass perfusion imaging has enough sensitivity and specificity in breast tumor diagnosis.
文摘Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York's Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations.
文摘Your Excellency President Bassirou Diomaye Faye,Your Excellency President Mohamed Ould Cheikh El Ghazouani,Chairperson of the African Union(AU),Your Excellencies Heads of State and Government and Heads of Delegation,Your Excellency Mr.Antonio Guterres,Secretary General of the United Nations,Your Excellency Mr.Moussa Faki Mahamat,Chairperson of the AUCommission,Friends and Distinguished Guests,Blossoms in spring turn into fruits in autumn,and a bumper harvest is the reward of hard work.In this season of harvest,I am delighted to gather together with so many old and new friends in Beijing to discuss grand plans for China-Africa friendship and cooperation in the new era.On behalf of the Chinese government and people,I extend a warm welcome to you all!
文摘We,the Heads of State,Government and Delegations of the People's Republic of China and 53 African countries,and the Chairperson of the African Union Commission,gathered in China from September 4 to 6 for the 2024 Beijing Summit of the Forum on China-Africa Cooperation(FOCAC).Under the theme“Joining Hands to Advance Modernization and Build a High-Level China-Africa Community with a Shared Future,”the Summit adopted by consensus the Beijing Declaration on Jointly Building an All-Weather China-Africa Community with a Shared Future for the NewEra.
