https://scholars.lib.ntu.edu.tw/handle/123456789/416515
標題: | Simultaneous detection and separation of hyperacute intracerebral hemorrhage and cerebral ischemia using amide proton transfer MRI | 作者: | Wang, M. Hong, X. Che-Feng Chang Li, Q. Ma, B. Zhang, H. Xiang, S. Heo, H.-Y. Zhang, Y. Lee, D.-H. Jiang, S. Leigh, R. Koehler, R.C. Van Zijl, P.C.M. Wang, J. Zhou, J. |
關鍵字: | intracerebral hemorrhage; stroke; APT imaging; CEST imaging; molecular imaging | 公開日期: | 2015 | 出版社: | WILEY-BLACKWELL | 卷: | 74 | 期: | 1 | 起(迄)頁: | 42 | 來源出版物: | Magnetic Resonance in Medicine | 摘要: | © 2014 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc. Purpose To explore the capability of amide proton transfer (APT) imaging in the detection of hemorrhagic and ischemic strokes using preclinical rat models. Methods The rat intracerebral hemorrhage (ICH) model (n = 10) was induced by injecting bacterial collagenase VII-S into the caudate nucleus, and the permanent ischemic stroke model (n = 10) was induced by using a 4-0 nylon suture to occlude the origin of the middle cerebral artery. APT-weighted (APTw) MRI was acquired on a 4.7T animal imager and quantified using the magnetization transfer-ratio asymmetry at 3.5 ppm from water. Results There was a consistently high APTw MRI signal in hyperacute ICH during the initial 12 h after injection of collagenase compared with the contralateral brain tissue. When hemorrhagic and ischemic stroke were compared, hyperacute ICH and cerebral ischemia demonstrated opposite APTw MRI contrasts - namely, hyperintense versus hypointense compared with contralateral brain tissue, respectively. There was a stark contrast in APTw signal intensity between these two lesions. Conclusion APT-MRI could accurately detect hyperacute ICH and distinctly differentiate hyperacute ICH from cerebral ischemia, thus opening up the possibility of introducing to the clinic a single MRI scan for the simultaneous visualization and separation of hemorrhagic and ischemic strokes at the hyperacute stage. Magn Reson Med 74:42-50, 2015. |
ISSN: | 07403194 | DOI: | 10.1002/mrm.25690 |
顯示於: | 生理學科所 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。