Towards new vistas in preamplifier design for MRI

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Abstract

High signal to noise ratio (SNR) in magnetic resonance imaging is vital for ensuring accurate diagnosis and treatment. Arrays of surface coils for receive only purposes is a well established way to increase SNR. However, due to crosstalk between the array elements, the SNR can be severely degraded. For that reason, arrays often do not exploit their full potential. By using a series decoupling network with non-conventional matching and preamplifier impedances the decoupling between elements can be increased significantly. In the presented design example, almost 6 dB additional decoupling can be achieved with no impairment of preamplifier noise figure. The decoupling changes as a function of both coil and preamplifier performance. Thus, the fundamental trade-off between noise and decoupling is discussed. This work embarks on the path towards new vistas in design of preamplifiers for surface coil arrays for magnetic resonance imaging.
Original languageEnglish
Title of host publicationProceedings of the 47th European Microwave Conference
PublisherIEEE
Publication date2017
Pages1159-1162
ISBN (Print)978-1-4799-6773-5
Publication statusPublished - 2017
Event2017 47th European Microwave Conference (EuMC) -
Duration: 10 Oct 201712 Oct 2017
Conference number: 47
http://www.eumweek.com/conferences/eumc.html

Conference

Conference2017 47th European Microwave Conference (EuMC)
Number47
Period10/10/201712/10/2017
Internet address

Keywords

  • Decoupling
  • Matching networks
  • Noise matching
  • Preamplifiers
  • Surface coils

Cite this

Johansen, D. H., Sanchez, J. D., Zhurbenko, V., & Ardenkjær-Larsen, J. H. (2017). Towards new vistas in preamplifier design for MRI. In Proceedings of the 47th European Microwave Conference (pp. 1159-1162). IEEE.
Johansen, Daniel Højrup ; Sanchez, Juan Diego ; Zhurbenko, Vitaliy ; Ardenkjær-Larsen, Jan Henrik. / Towards new vistas in preamplifier design for MRI. Proceedings of the 47th European Microwave Conference. IEEE, 2017. pp. 1159-1162
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abstract = "High signal to noise ratio (SNR) in magnetic resonance imaging is vital for ensuring accurate diagnosis and treatment. Arrays of surface coils for receive only purposes is a well established way to increase SNR. However, due to crosstalk between the array elements, the SNR can be severely degraded. For that reason, arrays often do not exploit their full potential. By using a series decoupling network with non-conventional matching and preamplifier impedances the decoupling between elements can be increased significantly. In the presented design example, almost 6 dB additional decoupling can be achieved with no impairment of preamplifier noise figure. The decoupling changes as a function of both coil and preamplifier performance. Thus, the fundamental trade-off between noise and decoupling is discussed. This work embarks on the path towards new vistas in design of preamplifiers for surface coil arrays for magnetic resonance imaging.",
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Johansen, DH, Sanchez, JD, Zhurbenko, V & Ardenkjær-Larsen, JH 2017, Towards new vistas in preamplifier design for MRI. in Proceedings of the 47th European Microwave Conference. IEEE, pp. 1159-1162, 2017 47th European Microwave Conference (EuMC), 10/10/2017.

Towards new vistas in preamplifier design for MRI. / Johansen, Daniel Højrup; Sanchez, Juan Diego; Zhurbenko, Vitaliy; Ardenkjær-Larsen, Jan Henrik.

Proceedings of the 47th European Microwave Conference. IEEE, 2017. p. 1159-1162.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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AB - High signal to noise ratio (SNR) in magnetic resonance imaging is vital for ensuring accurate diagnosis and treatment. Arrays of surface coils for receive only purposes is a well established way to increase SNR. However, due to crosstalk between the array elements, the SNR can be severely degraded. For that reason, arrays often do not exploit their full potential. By using a series decoupling network with non-conventional matching and preamplifier impedances the decoupling between elements can be increased significantly. In the presented design example, almost 6 dB additional decoupling can be achieved with no impairment of preamplifier noise figure. The decoupling changes as a function of both coil and preamplifier performance. Thus, the fundamental trade-off between noise and decoupling is discussed. This work embarks on the path towards new vistas in design of preamplifiers for surface coil arrays for magnetic resonance imaging.

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Johansen DH, Sanchez JD, Zhurbenko V, Ardenkjær-Larsen JH. Towards new vistas in preamplifier design for MRI. In Proceedings of the 47th European Microwave Conference. IEEE. 2017. p. 1159-1162