کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10712888 | 1025280 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ex vivo magnetic resonance imaging of rat spinal cord at 9.4 T
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ex vivo magnetic resonance imaging of rat spinal cord at 9.4 T Ex vivo magnetic resonance imaging of rat spinal cord at 9.4 T](/preview/png/10712888.png)
چکیده انگلیسی
The magnetic resonance (MR) properties of the rat spinal cord were characterized at the T9 level with ex vivo experiments performed at 9.4 T. The inherent endogenous contrast parameters, proton density (PD), longitudinal and transverse relaxation times T1 and T2, and magnetization transfer ratio (MTR) were measured separately for the grey matter (GM) and white matter (WM). Analysis of the measurements indicated that these tissues have statistically different proton densities with means PDGM=54.8±2.5% versus PDWM=45.2±2.4%, and different T1 values with means T1GM=2.28±0.23 s versus T1WM=1.97±0.21 s. The corresponding values for T2 were T2GM=31.8±4.9 ms versus T2WM=29.5±4.9 ms, and the difference was insignificant. The difference between MTRGM=31.2±6.1% and MTRWM=33.1±5.9% was also insignificant. These results collectively suggest that PD and T1 are the two most important parameters that determine the observed contrast on spinal cord images acquired at 9.4 T. Therefore, in MR imaging studies of spinal cord at this field strength, these parameters need to be considered not only in optimizing the protocols but also in signal enhancement strategies involving exogenous contrast agents.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Magnetic Resonance Imaging - Volume 23, Issue 4, May 2005, Pages 601-605
Journal: Magnetic Resonance Imaging - Volume 23, Issue 4, May 2005, Pages 601-605
نویسندگان
Mehmet Bilgen, Baraa Al-Hafez, Thomas M. Malone, Irina V. Smirnova,