Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
631-01-015 / 631-01-015 ISMRM Abstract

Comparative analysis of bore-tube integrated 7T body pTx coils: transmit efficiency, SAR, and load robustness

Primary: Physics & Engineering - RF Arrays & Systems
Secondary: Physics & Engineering - High-Field MRI
631-01-015 · RF Coils · Thursday, 14 May, 8:30 AM–10:06 AM · Roof Terrace
631-01-015 · RF Coils · Thursday, 14 May, 8:30 AM–10:06 AM · Roof Terrace
Keywords: Body Imaging Transmit efficiency RF modeling RF Coil Array Parallel Transmission (pTx)
Accepted
Ehsan Kazemivalipour 1,2, Jason Stockmann1,2, John M Drago1,2,3, Lawrence L Wald1,2,4
1Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Charlestown, United States of America
2Harvard Medical School, Boston, United States of America
3Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, United States of America
4Harvard-MIT Health Sciences and Technology, Cambridge, United States of America
Presenting Author: Ehsan Kazemivalipour

Synopsis

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References

1. Orzada S, Quick HH, Ladd ME, et al. A flexible 8-channel transmit/receive body coil for 7 T human imaging. In proceedings of the 17th Scientific Meeting, International Society for Magnetic Resonance in Medicine. Honolulu, US 2009:p. 2999.
2. Egorova SS, Lisachenko NA, Kretov EI, et al. A Bore-Integrated Patch Antenna Array for Whole-Body Excitation in Ultra-High-Field Magnetic Resonance Imaging. IEEE Access. 2025;12:23120-22313. DOI: 10.1109/ACCESS.2025.3536361. [doi]
3. Raaijmakers AJ, Italiaander M, Voogt IJ, et al. The fractionated dipole antenna: A new antenna for body imaging at 7 Tesla. Magn Reson Med. 2016;75(3):1366-1374. DOI: 10.1002/mrm.25596. [doi]
4. Fiedler TM, Orzada S, Floser M, et al. Performance and safety assessment of an integrated transmit array for body imaging at 7 T under consideration of specific absorption rate, tissue temperature, and thermal dose. NMR Biomed. 2022;35(5):e4656. DOI: 10.1002/nbm.4656. [doi]
5. Fiedler TM, Orzada S, Floser M, et al. Performance analysis of integrated RF microstrip transmit antenna arrays with high channel count for body imaging at 7 T. NMR Biomed. 2021;34(7):e4515. DOI: 10.1002/nbm.4515. [doi]
6. Orzada S, Bitz AK, Johst S, et al. Analysis of an Integrated 8-Channel Tx/Rx Body Array for Use as a Body Coil in 7-Tesla MRI. Frontiers in Physics. 2017;5. DOI:10.3389/fphy.2017.00017. [doi]
7. Drago JM, Guryev G, Arango N, et al. The Ritz adjoint method for optimization of arbitrary waveform excitation pulses: Demonstration in slice-selective parallel transmission. Intl Soc Mag Reson Med 2025.
8. Kazemivalipour E, Drago JM, Wald LL. Analysis of patch, dipole, microstrip, and loop Tx arrays as a bore-tube integrated 7T body coil. Intl Soc Mag Reson Med 2025.
9. Makarov SN, Noetscher GM, Yanamadala J, et al. Virtual Human Models for Electromagnetic Studies and Their Applications. IEEE Rev Biomed Eng. 2017;10:95-121. DOI: 10.1109/RBME.2017.2722420. [doi]
10. Kozlov M, Turner R. Fast MRI coil analysis based on 3-D electromagnetic and RF circuit co-simulation. J Magn Reson. 2009;200(1):147-152. DOI: 10.1016/j.jmr.2009.06.005. [doi]
11. Kazemivalipour E, Wald LL, Guerin B. Comparison of tight-fitting 7T parallel-transmit head array designs using excitation uniformity and local specific absorption rate metrics. Magn Reson Med. 2024;91(3):1209-1224. DOI: 10.1002/mrm.29900. [doi]
12. Guerin B, Gebhardt M, Cauley S, et al. Local specific absorption rate (SAR), global SAR, transmitter power, and excitation accuracy trade-offs in low flip-angle parallel transmit pulse design. Magn Reson Med. 2014;71(4):1446-1457. DOI: 10.1002/mrm.24800. [doi]
13. Eichfelder G, Gebhardt M. Local specific absorption rate control for parallel transmission by virtual observation points. Magn Reson Med. 2011;66(5):1468-1476. DOI: 10.1002/mrm.22927. [doi]

Cite this abstract

http://echo.ismrm.org/p/ISMRM2026/631-01-015