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| 001 | 830108 | ||
| 005 | 20210131030649.0 | ||
| 024 | 7 | _ | |a 10.1109/TNS.2017.2691546 |2 doi |
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| 100 | 1 | _ | |a Berneking, Arne |0 P:(DE-Juel1)159131 |b 0 |
| 245 | _ | _ | |a Design and Characterization of a Gradient-Transparent RF Copper Shield for PET Detector Modules in Hybrid MR-PET Imaging |
| 260 | _ | _ | |a New York, NY |c 2017 |b IEEE |
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| 520 | _ | _ | |a This paper focuses on the design and the characterization of a frequency-selective shield for positron emission tomography (PET) detector modules of hybrid magnetic resonance-PET scanners, where the shielding of the PET cassettes is located close to the observed object. The proposed shielding configuration is designed and optimized to guarantee a high shielding effectiveness (SE) of up to 60 dB for B1 -fields at the Larmor frequency of 64 MHz, thus preventing interactions between the radio-frequency (RF) coil and PET electronics. On the other hand, the shield is transparent to the gradient fields with the consequence that eddy-current artifacts in the acquired EPI images are significantly reduced with respect to the standard solid-shield configuration. The frequency-selective behavior of the shield is characterized and validated via simulation studies with CST MICROWAVE STUDIO in the megahertz and kilohertz range. Bench measurements with an RF coil built in-house demonstrated the high SE at the Larmor frequency. Moreover, measurements on a 4-T human scanner confirmed the abolishment of eddy current artifact and also provided an understanding of where the eddy currents occur with respect to the sequence parameters. Simulations and measurements for the proposed shielding concept were compared with a solid copper shielding configuration. |
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| 700 | 1 | _ | |a Trinchero, Riccardo |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Ha, YongHyun |0 P:(DE-Juel1)159538 |b 2 |u fzj |
| 700 | 1 | _ | |a Finster, Felix |0 P:(DE-Juel1)169335 |b 3 |
| 700 | 1 | _ | |a Cerello, Piergiorgio |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Lerche, Christoph |0 P:(DE-Juel1)164254 |b 5 |u fzj |
| 700 | 1 | _ | |a Shah, N. J. |0 P:(DE-Juel1)131794 |b 6 |u fzj |
| 773 | _ | _ | |a 10.1109/TNS.2017.2691546 |g p. 1 - 1 |0 PERI:(DE-600)2025398-9 |n 5 |p 1118-1127 |t IEEE transactions on nuclear science |v 64 |y 2017 |x 1558-1578 |
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