Implementation of GOIA-Wurst(16,4) Pulses in the Semi-LASER Sequence for SAR-Reduction in Prostate MRSI

Isabell K. Steinseifer¹, Marnix C. Maas¹, Thiele Kobus¹, Tom W.J. Scheenen¹, Arend Heerschap¹

We present ¹H MRSI of the prostate achieved with the semi-LASER sequence and GOIA-WURST(16,4) refocusing pulses to reduce specific absorption rates. This can lead to reduced repetition times and improved k-space weighting to optimize SNR and acquisition times. In particular it may allow 1H MRSI with the use of an endorectal coil with increased spatial resolution within clinically acceptable scan times. The GOIA-W(16,4) pulses used in this work had a higher bandwidth than the standard higher order Hyperbolic Secant pulses (8.5kHz instead of 3.2 kHz) used in the semi-LASER sequence.