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T- and Cascaded Pi-Shaped 1H T/R Switches with Realistic Trace Width for 7 Tesla MRI


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DOI: https://doi.org/10.15866/irecap.v12i1.21628

Abstract


In this work, two designs of Transmit/Receive (T/R) switches are introduced for 7-Tesla magnetic resonance imaging. The T-shaped and the two cascaded Pi-shaped microstripline-based T/R switches for 1H MRI are designed with the minimum trace width constraint that handles the required power and assures a compact size of the switch. When the peak power of the Radio Frequency (RF) amplifier signal is 1 kW with 10% duty cycle, the average current that will pass through 50 Ω input impedance circuit is 2 A. Based on IPC 2221 standard for PCB traces, the minimum trace width that handles such a current is of 0.513 mm. The ADS software is used in designing the T as well as two sections pi-shaped switches. All the proposed 7-Tesla 1H MRI switches have revealed good matching (<-20 dB), low insertion loss (<0.34 dB), and high isolation (>60 dB) during transmit and receive. The designed switches are compact in size by around 40% reduction in dimensions compared to a conventional switch size (100 mm × 100 mm) without folding.
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Keywords


T-Shaped Microstripline; Pi-Shaped Microstripline; T/R Switch; PIN Diode; Insertion Loss

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References


B. Gruber, M. Froeling, T. Leiner, D. W. Klomp, Rf coils: A practical guide for nonphysicists, Journal of magnetic resonance imaging, Volume 48, (Issue 1), 2018, Pages 590-604.
https://doi.org/10.1002/jmri.26187

S. H. Rietsch, S. Brunheim, S. Orzada, M. N. Voelker, S. Maderwald, A. K. Bitz, M. Gratz, M. E. Ladd, H. H. Quick, Development and evaluation of a 16-channel receive-only RF coil to improve 7T ultra-high field body MRI with focus on the spine, Magnetic resonance in medicine, Volume 82, (Issue 2), 2019, Pages 796-810.
https://doi.org/10.1002/mrm.27731

G. Saleh, F. Sibaii, N. Alashban, H. Alkhateeb, F. Hegazi, M. Hegazi, Effects of tissues and geometric shapes of phantoms on the specific energy absorption rate, International Journal of RF and Microwave Computer-Aided Engineering, Volume 28, (Issue 3), 2018.
https://doi.org/10.1002/mmce.21252

G. Saleh, K. Solbach, A. Rennings, Z. Chen, SAR reduction for dipole RF coil element at 7 Tesla by using dielectric overlay, in: 2012 Loughborough Antennas & Propagation Conference (LAPC), IEEE, pp. 1-3, 2012.
https://doi.org/10.1109/LAPC.2012.6403056

M. Muraguchi, T. Yukitake, Y. Naito, Optimum design of 3-db branch-line couplers using microstrip lines, IEEE transactions on Microwave Theory and Techniques, Volume 31 (Issue 8), 1983, Pages 674-678.
https://doi.org/10.1109/TMTT.1983.1131568

R. Ghatak, M. Pal, B. Sarkar, Realization of miniaturized quadrature hybrid coupler with reduced length branch arms using recursively loaded stubs, Progress In Electromagnetics Research Letters, Volume 43, 2013, Pages 45-54.
https://doi.org/10.2528/PIERL13071304

K.-S. Choi, K.-C. Yoon, J.-Y. Lee, C.-K. Lee, S.-C. Kim, K.-B. Kim, J.-C. Lee, Compact branch-line coupler with harmonics suppression using meander T-shaped line, Microwave and Optical Technology Letters, Volume 56, (Issue 6), 2014, Pages 1382-1384.
https://doi.org/10.1002/mop.28331

L. Sun, Y.-Z. Yin, X. Lei, V.Wong, A novel miniaturized branch-line coupler with equivalent transmission lines, Progress In Electromagnetics Research Letters, Volume 38, 2013, Pages 35-44.
https://doi.org/10.2528/PIERL13011302

B. Sa'ad, S. K. Rahim, R. Dewan, Compact wide-band branch-line coupler with meander line, cross, and two-step stubs, Microwave and Optical Technology Letters, Volume 55, (Issue 8), 2013, Pages 1810-1815.
https://doi.org/10.1002/mop.27731

G.-H. Pei, H.-K. Choi, A miniaturized 3-db hybrid coupler using the comb line, Microwave and Optical Technology Letters, Volume 57, (Issue 11), 2015, Pages 2641-2645.
https://doi.org/10.1002/mop.29410

K. P. Kumar, R. K. Barik, S. Karthikeyan, A novel two section branch line coupler employing different transmission line techniques, AEU International Journal of Electronics and Communications, Volume 70, (Issue 5), 2016, Pages 738-742.
https://doi.org/10.1016/j.aeue.2016.02.011

M. Kumar, S. K. Parui, S. Das, Design of miniaturized dual-band wilkinson power divider using dual and cascade pi-shaped transmission lines., Radioengineering, Volume 27, (Issue 4), 2018.
https://doi.org/10.13164/re.2018.1056

M. Rao, J. M. Wild, RF instrumentation for same-breath triple nuclear lung MR imaging of 1h and hyperpolarized 3He and 129Xe at 1.5 T, Magnetic resonance in medicine, Volume 75, (Issue 4), 2016, Pages 1841-1848.
https://doi.org/10.1002/mrm.25680

M. Rao, F. Robb, J. M.Wild, Dedicated receiver array coil for 1h lung imaging with same-breath acquisition of hyperpolarized 3he and 129xe gas, Magnetic resonance in medicine, Volume 74, (Issue 1), 2015, Pages 291-299.
https://doi.org/10.1002/mrm.25384

E. A. Barberi, J. S. Gati, B. K. Rutt, R. S. Menon, A transmit-only/receive-only (toro) rf system for high-field mri/mrs applications, Magnetic Resonance in Medicine: An Official Journal of the International Society for Magnetic Resonance in Medicine, Volume 43, (Issue 2), 2000, Pages 284-289.
https://doi.org/10.1002/(SICI)1522-2594(200002)43:2<284::AID-MRM16>3.0.CO;2-C

C.-H. Choi, J. M. Hutchison, D. J. Lurie, Design and construction of an actively frequency-switchable RF coil for field-dependent magnetisation transfer contrast MRI with fast field-cycling, Journal of Magnetic Resonance, Volume 207, (Issue 1), 2010, Pages 134-139.
https://doi.org/10.1016/j.jmr.2010.08.018

H. Lim, K. Thind, F. M. Martinez-Santiesteban, T. J. Scholl, Construction and evaluation of a switch-tuned 13c-1h birdcage radiofrequency coil for imaging the metabolism of hyperpolarized 13c-enriched compounds, Journal of Magnetic Resonance Imaging, Volume 40, (Issue 5), 2014, Pages 1082-1090.
https://doi.org/10.1002/jmri.24458

S. Ha, M. J. Hamamura, O. Nalcioglu, L. T. Muftuler, A pin diode controlled dual-tuned MRI RF coil and phased array for multi nuclear imaging, Physics in Medicine & Biology, Volume 55, (Issue 9), 2010.
https://doi.org/10.1088/0031-9155/55/9/011

C.-H. Choi, S.-M. Hong, Y. Ha, N. J. Shah, Design and construction of a novel 1h/19f double-tuned coil system using pin-diode switches at 9.4 T, Journal of magnetic resonance, Volume 279, 2017, Pages 11-15.
https://doi.org/10.1016/j.jmr.2017.04.005

J. Y. Lu, T. Grafendorfer, T. Zhang, S. Vasanawala, F. Robb, J. M. Pauly, G. C. Scott, Depletion-mode gan hemt q-spoil switches for MRI coils, IEEE transactions on medical imaging, Volume 35, (Issue 12), 2016, Pages 2558-2567.
https://doi.org/10.1109/TMI.2016.2586053

M. Twieg, M. Rooij, M. Griswold, Enhancement mode gan on silicon (egan fets) for coil detuning, in: Proc. Int. Soc. Magn. Reson. Med., 2014.

M. Fuentes, E. Weber, S. Wilson, B. Li, S. Crozier, Micro-electromechanical systems (mems) based rf-switches in mri-a performance study, in: Proceedings of the 18th Annual Meeting of ISMRM, 2010.

S. Bulumulla, K. Park, E. Fiveland, J. Iannotti, F. Robb, Mems switch integrated radio frequency coils and arrays for magnetic resonance imaging, Review of Scientific Instruments, Volume 88, (Issue 2), 2017.
https://doi.org/10.1063/1.4975181

A. Maunder, M. Rao, F. Robb, J. Wild, Rf coil design for multinuclear lung mri of 19f fluorinated gases and 1h using mems, in: Proceedings of the 24th Annual Meeting of ISMRM, 2016.

A. Maunder, M. Rao, F. Robb, J. M.Wild, Comparison of mems switches and pin diodes for switched dual tuned RF coils, Magnetic resonance in medicine, Volume 80, (Issue 4), 2018, Pages 1746-1753.
https://doi.org/10.1002/mrm.27156

A. Abuelhaija, G. Saleh, T. Baldawi, S. Salama, Symmetrical and asymmetrical microstripline-based transmit/receive switches for 7-tesla magnetic resonance imaging, International Journal of Circuit Theory and Applications, 2021.
https://doi.org/10.1002/cta.3013

S. Orzada, K. Solbach, M. Gratz, S. Brunheim, T. M. Fiedler, S. Johst, A. K. Bitz, S. Shooshtary, A. Abuelhaija, M. N. Voelker, et al., A 32-channel parallel transmit system add-on for 7T MRI, Plos one, Volume 14, (Issue 9), 2019.
https://doi.org/10.1371/journal.pone.0222452

G. Saleh, A. Abuelhaija, Dual tuned switch for dual resonance 1h/13c mri coil, in: 2021 IEEE International IOT, Electronics and Mechatronics Conference (IEMTRONICS), IEEE, pp. 1-7, 2021.
https://doi.org/10.1109/IEMTRONICS52119.2021.9422627

Abuelhaija, A., Saleh, G., A Pi-Shaped Compact Dual Tuned 1H/23Na Microstripline-Based Switch for 7-Tesla MRI, (2021) International Journal on Communications Antenna and Propagation (IRECAP), 11 (1), pp. 57-64.
https://doi.org/10.15866/irecap.v11i1.20302

A. Abuelhaija, G. Saleh, O. Nashwan, S. Issa, S. Salama, Multi-and dual-tuned microstripline-based transmit/receive switch for 7-tesla magnetic resonance imaging, International Journal of Imaging Systems and Technology, 2021.
https://doi.org/10.1002/cta.3013

D. G. Brooks, J. Adam, Trace currents and temperatures revisited, (Copyright Douglas Brooks, Kirkland, WA. Note15, 2015).

Y. Ji, W. Hoffmann, M. Pham, A. E. Dunn, H. Han, C. Özerdem, H. Waiczies, M. Rohloff, B. Endemann, C. Boyer, et al., High peak and high average radiofrequency power transmit/receive switch for thermal magnetic resonance, Magnetic resonance in medicine, Volume 80, (Issue 5), 2018, Pages 2246-2255.
https://doi.org/10.1002/mrm.27194

W.-H. Tu, K. Chang, Compact second harmonic-suppressed bandstop and bandpass filters using open stubs, IEEE Transactions on Microwave Theory and Techniques, Volume 54, (Issue 6), 2006, Pages 2497-2502.
https://doi.org/10.1109/TMTT.2006.875802

Abuelhaija, A., Salama, S., El-Absi, M., Multi-Tuned Radiofrequency Coil Using Microfluidically Tunable Capacitor for Magnetic Resonance Imaging/Spectroscopy at 7-Tesla, (2019) International Journal on Communications Antenna and Propagation (IRECAP), 9 (6), pp. 419-427.
https://doi.org/10.15866/irecap.v9i6.17834


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