Cancer Institute A national cancer institute
designated cancer center

Dwight Nishimura

Publication Details

  • Three-dimensional magnetization-prepared imaging using a concentric cylinders trajectory. Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Kwon, K. T., Wu, H. H., Shin, T., Cukur, T., Lustig, M., Nishimura, D. G. 2013

    Abstract:

    To develop new magnetization-prepared imaging schemes based on a three-dimensional (3D) concentric cylinders trajectory.The 3D concentric cylinders trajectory, which is robust to off-resonance effects and timing delays while requiring fewer excitations than a comparable 3D Cartesian (3DFT) sequence, is used as the readout for magnetization-prepared sequences exploiting its inherently centric-ordered structure. Two applications: (i) T1 -weighted brain imaging with an inversion-recovery-prepared radiofrequency-spoiled gradient-echo (IR-SPGR) sequence, (ii) non-contrast-enhanced (NCE) peripheral angiography with a magnetization-prepared balanced steady-state free precession (bSSFP) sequence are presented to demonstrate the effectiveness of the proposed method. For peripheral angiography, the scan efficiency is further improved by interleaving different preparations at different rates and by carefully designing the sampling geometry for an efficient parallel imaging method.In vivo brain scans with an IR-SPGR sequence and lower extremity scans with a magnetization-prepared bSSFP sequence for NCE peripheral angiography both demonstrate that the proposed sequences with concentric cylinders effectively capture the transient magnetization-prepared contrast with faster scan times than a corresponding 3DFT sequence. The application of peripheral angiography also shows the feasibility of the proposed interleaving schemes and parallel imaging method.The 3D concentric cylinders trajectory is a robust and efficient readout that is well-suited for magnetization-prepared imaging. Magn Reson Med, 2013. © 2013 Wiley Periodicals, Inc.

    View details for PubMedID 23818212

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