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Dispersing FID artifact uniformly by modulating phase of 180 degrees pulse of Spin Echo sequence with quadratic function.

Kosuke Ito¹ and Atsushi Kuratani¹
¹Healthcare Business Unit, Hitachi, Ltd., Kashiwa, Japan

Dispersing FID artifact in spin echo image uniformly by modulating phase of 180 degrees pulse quadratic function was proposed. Signal intensity of artifact is smaller, uniform along phase encode direction, and artifact was not confirmed on images. Higher acceleration factor was applied.

Figure 3 Volunteer T1 weighted image

(a): conventional phase control

(b): proposed phase modulation

(c): difference between (a) and (b), Window width is 1/5 of (a) and (b)

(d): line profile on FID artifact

Figure 1. RF phase of proposed method (a), and signal intensity of FID artifact