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New applications of TrueFISP in cardiovascular magnetic resonance imaging: three-dimensional TrueFISP and inversion recovery TrueFISP

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons84187

Scheffler,  K
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Scheffler, K. (2001). New applications of TrueFISP in cardiovascular magnetic resonance imaging: three-dimensional TrueFISP and inversion recovery TrueFISP. Poster presented at International MR Angio Club, XII International Workshop on MRA, Lyon, France.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-E2FE-0
Abstract
Three-dimensional TrueFISP: The TrueFISP sequence as proposed by Oppelt et al. in 1986 offers a high contrast between myocardium and intraventricular cavity, which is desirable for accurate assessment of ventricular function. A significant drawback of True- FISP is its sensitivity to off-resonance effects caused by an imperfect shim, chemical shifts, eddy currents, and Maxwell effects. An extension of the two-dimensional TrueFISP sequence to an ECG gated three-dimensional TrueFISP sequence is thus not straight forward and requires a very carefully designed acquisition scheme. The current implementation of our gated three-dimensional TrueFISP sequence allows to acquire the complete heart in its diastolic phase within about 20 heartbeats with a resolution of 2 x 2 x 3 mm. In addition, a three-dimensional TrueFISP cine technique with a time resolution of 80 ms and a spatial resolution of 3 x 4 x 4 mm was implemented. hTcersion recoveo" TrueFISP: Two-dimensional inversion recovery TrueFISP is a new method for T1 quantification of the myocard within several heartbeats. The intrinsically T~ weighted FLASH readout module was replaced by a TrueFISP readout module to continuously acquire the recovery of longitudinal magnetization alter inversion or saturation. Quantitative T~ measurements on phantoms and on humans based on FLASH and TrueFISP were compared to the gold standard of separately acquired TI measurements. Applications of IR TrueFISP may include quantitative assessment of myocard damage after CA administration.