TRASE is an MR imaging sequence that achieves k-space encoding through the use of phase gradients in the RF transmit field. The twisted solenoid is the most efficient RF transmit coil used for TRASE encoding; however, the geometry results in a long coil with a relatively short imaging volume. We introduce a new truncated design for the twisted solenoid to increase the usable imaging volume relative to the coil’s size. Simulation studies conducted indicate the truncated design can create similar imaging volumes to the untruncated version whilst significantly reducing the coils length by as much as a half.
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