Combining rheology and MRI: Imaging healthy and tumorous brains based on mechanical properties

This file was created by the Typo3 extension sevenpack version 0.7.16 --- Timezone: CET Creation date: 2024-11-21 Creation time: 21-36-36 --- Number of references 5 article Kofahl2016 Combining rheology and MRI: Imaging healthy and tumorous brains based on mechanical properties Magn. Reson. Med. 2016 mrt http://onlinelibrary.wiley.com/doi/10.1002/mrm.26477 10.1002/mrm.26477 A.-L.Kofahl S.Theilenberg J.Bindl D.Ulucay J.Wild S.Napiletzki B.Schu-Schätter A.Vohlen B.Pintea J.Finsterbusch E.Hattingen C.Urbach K.Maier article radicke11 Acoustic radiation contrast in <prt>MR</prt> images for breast cancer diagnostics - initial phantom study Ultrasound in Medicine & Biology 2011 37 253-261 Acoustic radiation contrast in magnetic resonance images is an approach to visualize the changes in ultrasonic loss and viscoelastic changes of the sample with the resolution of a magnetic resonance imaging (MRI) system. By irradiating ultrasound (US) into a tissue-mimicking sample, a displacement along the US beam path caused by the acoustic radiation force is obtained. This displacement varies with the US intensity, the duration of irradiation, the US attenuation and the viscoelastic properties of the sample. US pulses of 2.5 MHz with a duration of 20 ms and an intensity of <17 W/cm(2) are used. An MRI sequence was programmed to produce images in which the magnitude of the displacement is visualized by gray value changes. In addition, a finite element simulation of the measurements was performed to demonstrate the feasibility of the method. Through examination of the measurements and the simulations, information about viscoelastic changes was achieved. In this work, measurements on different breast phantoms are presented. mrt http://www.sciencedirect.com/science/article/pii/S0301562910006186 10.1016/j.ultrasmedbio.2010.11.005 M.Radicke J.Mende A.-L.Kofahl J.Wild D.Ulucay B.Habenstein M.Deimling P.Trautner B.Weber K.Maier article paperkalk Acoustic radiation force contrast in <prt>MRI</prt>: detection of calcifications in tissue-mimicking phantoms Medical Physics 2010 37 6347-6356 mrt http://online.medphys.org/resource/1/mphya6/v37/i12/p6347_s1 10.1118/1.3512806 J.Mende J.Wild D.Ulucay M.Radicke A.-L.Kofahl B.Weber R.Krieg K.Maier article Mende2010203 Nuclear acoustic resonance in fluids using piezoelectric nanoparticles Journal of Magnetic Resonance 2010 203 2 203 - 207 mrt http://www.sciencedirect.com/science/article/pii/S1090780709003747 1090-7807 10.1016/j.jmr.2009.12.019 J.Mende N.Elmiladi C.Höhl K.Maier article springerlink:10.1007/s10751-008-9628-6 New image contrast method in magnetic resonance imaging via ultrasound Hyperfine Interactions 2008 181 21-26 When applied to a sample, ultrasound (US) gives rise to a displacement of tissue and a flow in a liquid due to the acoustic radiation pressure. These movements depend on the viscoelastic properties of the sample and can be visualized precisely with an MRI scanner using diffusion- sensitive pulse sequences. In this paper, measurements will be presented, which show the visualization of the US under variation of its parameters in different liquids and in tissue. University of Bonn Helmholtz-Institut für Strahlen-und Kernphysik Nussallee 14–16 53115 Bonn Germany mrt http://www.springerlink.com/content/0926650r6tw30w11/ Springer Netherlands 0304-3843 10.1007/s10751-008-9628-6 M.Radicke A.Engelbertz B.Habenstein M.Lewerenz O.Oehms P.Trautner B.Weber S.Wrede K.Maier