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Abstract #1051

Robust 3D 1H MRSI of the prostate without endorectal coil at 3T

Nassim Tayari 1 , Isabell K. Steinseifer 1 , Cai Xia Fu 2 , Elisabeth Weiland 3 , Jack J.A. van Asten 1 , Tom W.J. Scheenen 4 , Marnix C Maas 1 , and Arend Heerschap 1

1 Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, Netherlands, 2 Siemens Shenzhen Magnetic Resonance Ltd., China, 3 Siemens Healthcare, Erlangen, Germany, 4 Department of Radiology and Nuclear Medicine, Radboud university medical center, Nijmegen, Netherlands

The use of an endorectal coil (ERC) in MR of the prostate is time consuming and uncomfortable for patients. In this work we demonstrate that robust 1H MRSI of the prostate can be performed without ERC by a semi-LASER sequence with GOIA-WURST(16,4) refocusing pulses. This sequence has an excellent performance as reflected by high citrate signals and minor lipid contamination. Furthermore, acquisition times can be shortened to 5 min (TR = 630 ms), which is clinically valuable. For the detection of the choline signal, a TR of about 900 ms is more favorable, to avoid too much signal saturation.

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