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Dynamic cardiac imaging with dual density spirals and off-resonance correction with 3-fold acceleration and 4 channels. Two phases of a short axis view of the heart. (a)–(b) sum-of-squares of gridding reconstruction exhibits coherent (arrows), incoherent (noise-like) aliasing artifacts and blurring due to off-resonance. (c)–(d) SPIRiT reduces both the coherent and incoherent artifacts as well as deblurring the image (arrows).
