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A fast, noniterative approach for accelerated high‐temporal resolution cine‐CMR using dynamically interleaved streak removal in the power‐spectral encoded domain with low‐pass filtering ( DISPEL ) and modulo‐prime spokes (Mo PS )
Author(s) -
Kawaji Keigo,
Patel Mita B.,
Cantrell Charles G.,
Tanaka Akiko,
Marino Marco,
Tamura Satoshi,
Wang Hui,
Wang Yi,
Carroll Timothy J.,
Ota Takeyoshi,
Patel Amit R.
Publication year - 2017
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1002/mp.12234
Subject(s) - streak , interleaving , imaging phantom , computer science , temporal resolution , cartesian coordinate system , iterative reconstruction , algorithm , computer vision , artificial intelligence , mathematics , physics , optics , geometry , operating system
Purpose To introduce a pair of accelerated non‐Cartesian acquisition principles that when combined, exploit the periodicity of k‐space acquisition, and thereby enable acquisition of high‐temporal cine Cardiac Magnetic Resonance ( CMR ). Methods The mathematical formulation of a noniterative, undersampled non‐Cartesian cine acquisition and reconstruction is presented. First, a low‐pass filtering step that exploits streaking artifact redundancy is provided (i.e., Dynamically Interleaved Streak removal in the Power‐spectrum Encoded domain with Low‐pass filtering [ DISPEL ]). Next, an effective radial acquisition for the DISPEL approach that exploits the property of prime numbers is described (i.e., Modulo‐Prime Spoke [Mo PS ]). Both DISPEL and Mo PS are examined using numerical simulation of a digital heart phantom to show that high‐temporal cine‐ CMR is feasible without removing physiologic motion vs aperiodic interleaving using Golden Angles. The combined high‐temporal cine approach is next examined in 11 healthy subjects for a time–volume curve assessment of left ventricular systolic and diastolic performance vs conventional Cartesian cine‐ CMR reference. Results The DISPEL method was first shown using simulation under different streak cycles to allow separation of undersampled radial streaking artifacts from physiologic motion with a sufficiently frequent streak‐cycle interval. Radial interleaving with Mo PS is next shown to allow interleaves with pseudo‐Golden‐Angle variants, and be more compatible with DISPEL against irrational and nonperiodic rotation angles, including the Golden‐Angle‐derived rotations. In the in vivo data, the proposed method showed no statistical difference in the systolic performance, while diastolic parameters sensitive to the cine's temporal resolution were statistically significant ( P < 0.05 vs Cartesian cine). Conclusions We demonstrate a high‐temporal resolution cine‐ CMR using DISPEL and Mo PS , whose streaking artifact was separated from physiologic motion.