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Abstract #3321

7 Tesla prostate imaging with flexible body coil array

Lavina Hoxha1,2, Konstantinos Papoutsis1,2, Sarah McElroy1,3, Max Kinnear-Nock1,2, Philippa Bridgen2,4, Pierluigi Di Cio2,4, Michela Cleri2,4, Jo Hajnal1,2, Vicky Goh1,2, and Özlem Ipek1,2
1School of Biomedical Engineering and Imaging Sciences, Kings College London, London, United Kingdom, 2London Collaborative Ultra high field System (LoCUS), London, United Kingdom, 3MR Research Collaborations, Siemens Healthcare Limited, Camberley, United Kingdom, 4Guys and St Thomas’ NHS Foundation Trust, Kings College London, London, United Kingdom

Synopsis

Keywords: RF Arrays & Systems, RF Arrays & Systems

Motivation: To test the feasibility of 7T T2-weighted and diffusion imaging of the prostate using phase-only shimming with an in-house built 10-channel dipole parallel-transmit array plus 30-channel loop-receive coil array.

Goal(s): To obtain in-vivo 7T T2w and diffusion (b=400s/mm2) prostate images in healthy volunteers using the torso array.

Approach: SAR margins were determined using phantom and Duke simulations with 10Tx/30Rx array and validated on the phantom with bench and MRI measurements (S-matrix, B1+ maps). T2w and diffusion images were acquired from the volunteers.

Results: Extensive coil validation established SAR margins using simulations, bench and MRI measurements, enabling anatomically representative T2-weighted and diffusion prostate images.

Impact: 7T torso parallel-transmit MRI is still under ongoing development to improve coil technology for better transmit efficiency and anatomical contrast. This study presents a contribution to this quest using T2-weighted and diffusion prostate images on an in-house-built 10Tx/30Rx torso array.

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