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Fig. 7A —Radiofrequency spike artifact
[7,
8]. One abnormal, bright pixel
in a Fourier space is transformed into sinusoidal noise in the image space. If
moved slightly farther away from the origin, spatial frequency is higher. A
spark in the MR scanner room, erroneously integrated into k-space, may result
in radiofrequency spike artifact. FT = Fourier transform.
