Real-time cardiac MRI with radial acquisition and k-space variant reduced-FOV reconstruction.

Autor: Li YY; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States; Radiology and Biomedical Engineering, Stony Brook University, New York, United States. Electronic address: Yulee.Li@chsli.org., Rashid S; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Cheng YJ; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Schapiro W; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Gliganic K; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Yamashita AM; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Tang J; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Grgas M; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Mendez M; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Haag E; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States., Pang J; Siemens Healthneers, Siemens Medical Solutions USA, Inc., United States., Stoeckel B; Siemens Healthneers, Siemens Medical Solutions USA, Inc., United States., Leidecker C; Siemens Healthneers, Siemens Medical Solutions USA, Inc., United States., Cao JJ; Cardiac Imaging, DeMatteis Center for Cardiac Research and Education, St. Francis Hospital, New York, United States; Clinical Medicine, Stony Brook University, New York, United States.
Jazyk: angličtina
Zdroj: Magnetic resonance imaging [Magn Reson Imaging] 2018 Nov; Vol. 53, pp. 98-104. Date of Electronic Publication: 2018 Jul 20.
DOI: 10.1016/j.mri.2018.07.008
Abstrakt: This work aims to demonstrate that radial acquisition with k-space variant reduced-FOV reconstruction can enable real-time cardiac MRI with an affordable computation cost. Due to non-uniform sampling, radial imaging requires k-space variant reconstruction for optimal performance. By converting radial parallel imaging reconstruction into the estimation of correlation functions with a previously-developed correlation imaging framework, Cartesian k-space may be reconstructed point-wisely based on parallel imaging relationship between every Cartesian datum and its neighboring radial samples. Furthermore, reduced-FOV correlation functions may be used to calculate a subset of Cartesian k-space data for image reconstruction within a small region of interest, making it possible to run real-time cardiac MRI with an affordable computation cost. In a stress cardiac test where the subject is imaged during biking with a heart rate of >100 bpm, this k-space variant reduced-FOV reconstruction is demonstrated in reference to several radial imaging techniques including gridding, GROG and SPIRiT. It is found that the k-space variant reconstruction outperforms gridding, GROG and SPIRiT in real-time imaging. The computation cost of reduced-FOV reconstruction is ~2 times higher than that of GROG. The presented work provides a practical solution to real-time cardiac MRI with radial acquisition and k-space variant reduced-FOV reconstruction in clinical settings.
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: