TY - JOUR
T1 - A 40-mm high-temperature superconducting surface resonator in a 3-T MRI system
T2 - Simulations and measurements
AU - Lin, In Tsang
AU - Yang, Hong Chang
AU - Chen, Jyh Horng
N1 - Funding Information:
Manuscript received January 29, 2011; revised May 30, 2011; accepted July 15, 2011. Date of publication September 12, 2011; date of current version December 2, 2011. This paper was recommended by Associate Editor M. Parizh. This work was supported by the National Health Research Institutes of Taiwan under Grant NHRI-EX100-10038.
PY - 2011/12
Y1 - 2011/12
N2 - In this paper, the Ansoft high-frequency structure simulation (HFSS) was adapted to investigate the unloaded quality-factor value of the radio-frequency (RF) receiving resonator. This paper focused on the materials aspects, and a comparison between electromagnetic stimulations and measurement was conducted. A 40 mm in diameter Bi2Sr2Ca2Cu 3Ox (Bi-2223) tape high-Tc superconducting RF resonator in 3 T was stimulated and built. The simulation models were established according to the experimental dimension of the Bi-2223 surface resonator. Measurements show that the Bi-2223 surface resonator at 77 K provides a gain of 3.84-fold signal-to-noise ratio on phantom images over that of the homemade copper resonator at 300 K. Measuring results were in accordance with predicted ones, and the difference between the predicted SNR gains and measured SNR gains is 1%. This paper suggests that using a Bi-2223 surface resonator at 77 K could be more useful for magnetic resonance imaging coils than a copper surface resonator at 300 K.
AB - In this paper, the Ansoft high-frequency structure simulation (HFSS) was adapted to investigate the unloaded quality-factor value of the radio-frequency (RF) receiving resonator. This paper focused on the materials aspects, and a comparison between electromagnetic stimulations and measurement was conducted. A 40 mm in diameter Bi2Sr2Ca2Cu 3Ox (Bi-2223) tape high-Tc superconducting RF resonator in 3 T was stimulated and built. The simulation models were established according to the experimental dimension of the Bi-2223 surface resonator. Measurements show that the Bi-2223 surface resonator at 77 K provides a gain of 3.84-fold signal-to-noise ratio on phantom images over that of the homemade copper resonator at 300 K. Measuring results were in accordance with predicted ones, and the difference between the predicted SNR gains and measured SNR gains is 1%. This paper suggests that using a Bi-2223 surface resonator at 77 K could be more useful for magnetic resonance imaging coils than a copper surface resonator at 300 K.
KW - BiSr CaCu O (Bi-2223)
KW - high-frequency structure simulation (HFSS)
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U2 - 10.1109/TASC.2011.2162839
DO - 10.1109/TASC.2011.2162839
M3 - Article
AN - SCOPUS:82455198572
SN - 1051-8223
VL - 21
SP - 3574
EP - 3580
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 6
M1 - 6017104
ER -