نتایج جستجو برای: quantitative magnetization transfer imaging

تعداد نتایج: 1039931  

2011
M Soellinger C Langkammer T Seifert-Held F Fazekas S Ropele

Magnetization transfer imaging advanced to an indispensible tool for investigating white matter changes. Quantitative magnetization transfer imaging methods allow the determination of the bound pool fraction (BPF), which is thought to be directly linked to myelin integrity. Long acquisition times and high specific absorption rates are still inhibiting broad in vivo utilization of currently avai...

2017
Florian Borsodi Valeriu Culea Christian Langkammer Michael Khalil Lukas Pirpamer Stefan Quasthoff Christian Enzinger Reinhold Schmidt Franz Fazekas Stefan Ropele

Several quantitative magnetic resonance imaging (MRI) techniques have been proposed to investigate microstructural tissue changes in amyotrophic lateral sclerosis (ALS) including diffusion tensor imaging (DTI), magnetization transfer imaging, and R2* mapping. Here, in this study, we compared these techniques with regard to their capability for detecting ALS related white matter (WM) changes in ...

Journal: :Brain connectivity 2011
Andrew L. Alexander Samuel A. Hurley Alexey A. Samsonov Nagesh Adluru Ameer Pasha Hosseinbor Pouria Mossahebi Do P. M. Tromp Elizabeth Zakszewski Aaron S. Field

The image contrast in magnetic resonance imaging (MRI) is highly sensitive to several mechanisms that are modulated by the properties of the tissue environment. The degree and type of contrast weighting may be viewed as image filters that accentuate specific tissue properties. Maps of quantitative measures of these mechanisms, akin to microstructural/environmental-specific tissue stains, may be...

Journal: :Breast cancer 2012
Richard G Abramson Lori R Arlinghaus Jared A Weis Xia Li Adrienne N Dula Eduard Y Chekmenev Seth A Smith Michael I Miga Vandana G Abramson Thomas E Yankeelov

Reliable early assessment of breast cancer response to neoadjuvant therapy (NAT) would provide considerable benefit to patient care and ongoing research efforts, and demand for accurate and noninvasive early-response biomarkers is likely to increase. Response assessment techniques derived from quantitative magnetic resonance imaging (MRI) hold great potential for integration into treatment algo...

Journal: :AJNR. American journal of neuroradiology 1996
J W Burke V P Mathews A D Elster J L Ulmer F M McLean S B Davis

Cranial MR imaging was performed in three patients in whom herpes simplex encephalitis was subsequently proved. In all cases, the postcontrast T1 weighted MR images obtained with magnetization transfer saturation showed greater central nervous system involvement than was apparent on the conventional MR images. Specifically, the postcontrast magnetization transfer images were superior at delinea...

Journal: :Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine 2016
Takashi Watanabe Jens Frahm Thomas Michaelis

This article provides an overview of in vivo magnetic resonance (MR) imaging contrasts obtained for mammalian brain in relation to histological knowledge. Emphasis is paid to the (1) significance of high spatial resolution for the optimization of T1, T2, and magnetization transfer contrast, (2) use of exogenous extra- and intracellular contrast agents for validating endogenous contrast sources,...

2014
Y. K. Tee G. W. J. Harston N. Blockley Thomas W. Okell J. Levman F. Sheerin M. Cellerini P. Jezzard J. Kennedy S. J. Payne M. A. Chappell

Amide proton transfer (APT) imaging is a pH mapping method based on the chemical exchange saturation transfer phenomenon that has potential for penumbra identification following stroke. The majority of the literature thus far has focused on generating pH-weighted contrast using magnetization transfer ratio asymmetry analysis instead of quantitative pH mapping. In this study, the widely used asy...

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