Regensburg 2007 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 1: Medizinische Bildgebung I
ST 1.6: Vortrag
Montag, 26. März 2007, 11:45–12:00, Ch 12.0.16
Ultrasound creates Magnetic Resonance Imaging contrast — •Marcus Radicke1, André Engelbertz1, Bernd Habenstein1, Meinert Lewerenz1, Ole Oehms1, Peter Trautner2, and Karl Maier1 — 1Helmholtz-Institut für Strahlen- und Kernphysik, Bonn — 2LIFE & BRAIN GmbH
Magnetic Resonance Imaging is extremely important in medical diagnostics. Image contrasts are based on three mean weightings: T1, T2 and proton density. To emphasise tissue properties magnetic contrast agents are used. The influence of Ultrasonic (US) pulses on a Magnetic Resonance Image sequence enables completely new contrasts that scales e.g. with the viscosity of the tissue. We used a Siemens Avanto 1,5T tomograph at the research centre life & brain in Bonn with standard image sequences combined with US-pulses. Pressure amplitude and pulse length were varied from 0 to 1 bar and 10 to 60ms. Recent experiments on systems having several viscosities and in various geometries are discussed.