A low SAR eight element passively fed meander dipole array for 7T prostate imaging

Irena Zivkovic; Catalina S. Arteaga de Castro; Andrew Webb

A low SAR eight element passively fed meander dipole array for 7T prostate imaging

Irena Zivkovic
, Catalina S. Arteaga de Castro
, Andrew Webb

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

The purpose is to compare the performance of an eight element passively fed meander dipole antenna designed for body MRI at 7 Tesla with that of a conventional actively fed array. The measured mean transmit efficiency (B1+/square root input power) in the prostate was 15% lower with the passively fed dipoles array, but the simulated max SAR10g was 44% lower, meaning that the overall SAR efficiency of the passively fed array is higher. In vivo RF shimmed turbo spin echo images showed similar image quality for both arrays, but with lower SAR values for the passively fed array.

Original language	English
Title of host publication	27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine
Place of Publication	Montreal, Canada
Publisher	International Society for Magnetic Resonance in Medicine
Publication status	Published - 2019
Externally published	Yes
Event	27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM2019) - Palais des congres Montreal, Montreal, Canada Duration: 11 May 2019 → 16 May 2019

Conference

Conference	27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM2019)
Abbreviated title	ISMRM2019
Country/Territory	Canada
City	Montreal
Period	11/05/19 → 16/05/19

Cite this

@inproceedings{e3c4067522a3485cad469bc60dec19ea,

title = "A low SAR eight element passively fed meander dipole array for 7T prostate imaging",

abstract = "The purpose is to compare the performance of an eight element passively fed meander dipole antenna designed for body MRI at 7 Tesla with that of a conventional actively fed array. The measured mean transmit efficiency (B1+/square root input power) in the prostate was 15\% lower with the passively fed dipoles array, but the simulated max SAR10g was 44\% lower, meaning that the overall SAR efficiency of the passively fed array is higher. In vivo RF shimmed turbo spin echo images showed similar image quality for both arrays, but with lower SAR values for the passively fed array. ",

author = "Irena Zivkovic and \{Arteaga de Castro\}, \{Catalina S.\} and Andrew Webb",

year = "2019",

language = "English",

booktitle = "27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine",

publisher = "International Society for Magnetic Resonance in Medicine ",

note = "27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM2019), ISMRM2019 ; Conference date: 11-05-2019 Through 16-05-2019",

}

Zivkovic, I, Arteaga de Castro, CS & Webb, A 2019, A low SAR eight element passively fed meander dipole array for 7T prostate imaging. in 27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine . International Society for Magnetic Resonance in Medicine , Montreal, Canada, 27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM2019), Montreal, Canada, 11/05/19.

A low SAR eight element passively fed meander dipole array for 7T prostate imaging. / Zivkovic, Irena; Arteaga de Castro, Catalina S.; Webb, Andrew.
27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine . Montreal, Canada: International Society for Magnetic Resonance in Medicine , 2019.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - A low SAR eight element passively fed meander dipole array for 7T prostate imaging

AU - Zivkovic, Irena

AU - Arteaga de Castro, Catalina S.

AU - Webb, Andrew

PY - 2019

Y1 - 2019

N2 - The purpose is to compare the performance of an eight element passively fed meander dipole antenna designed for body MRI at 7 Tesla with that of a conventional actively fed array. The measured mean transmit efficiency (B1+/square root input power) in the prostate was 15% lower with the passively fed dipoles array, but the simulated max SAR10g was 44% lower, meaning that the overall SAR efficiency of the passively fed array is higher. In vivo RF shimmed turbo spin echo images showed similar image quality for both arrays, but with lower SAR values for the passively fed array.

AB - The purpose is to compare the performance of an eight element passively fed meander dipole antenna designed for body MRI at 7 Tesla with that of a conventional actively fed array. The measured mean transmit efficiency (B1+/square root input power) in the prostate was 15% lower with the passively fed dipoles array, but the simulated max SAR10g was 44% lower, meaning that the overall SAR efficiency of the passively fed array is higher. In vivo RF shimmed turbo spin echo images showed similar image quality for both arrays, but with lower SAR values for the passively fed array.

M3 - Conference contribution

BT - 27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine

PB - International Society for Magnetic Resonance in Medicine

CY - Montreal, Canada

T2 - 27th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM2019)

Y2 - 11 May 2019 through 16 May 2019

ER -

A low SAR eight element passively fed meander dipole array for 7T prostate imaging

Abstract

Conference

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