Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T

Alireza Aghaeifar; Irena Zivkovic; Christian C. Mirkes; Theodor Steffen; Klaus Scheffler

Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T

Alireza Aghaeifar, Irena Zivkovic, Christian C. Mirkes, Theodor Steffen, Klaus Scheffler

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

Abstract

The homogenization of static magnetic field (B0) is necessary for MR imaging. The unwanted B0 inhomogeneity becomes more pronounced in ultra high field, and the scanner's inbuilt shim setup can not compensate the B0 fluctuation as is needed. Here we propose to use combined setup of the multi-coil approach and the scanner's shim setup to achieve higher homogeneity of B0 field. We employed custom-built multi-coil for slice-wise shimming in combination with the scanner's shim setup for global shimming. The results show improvement about 50% compare to dynamic shimming alone in the most of the slices.

Original language	English
Title of host publication	25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine
Place of Publication	Honolulu, USA
Publication status	Published - 2017
Externally published	Yes
Event	25th ISMRM Annual Meeting and Exhibition - Honolulu, United States Duration: 11 Apr 2017 → 27 Apr 2017 https://www.ismrm.org/2017-annual-meeting-exhibition/

Conference

Conference	25th ISMRM Annual Meeting and Exhibition
Abbreviated title	ISMRM2017
Country	United States
City	Honolulu
Period	11/04/17 → 27/04/17
Internet address	https://www.ismrm.org/2017-annual-meeting-exhibition/

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Cite this

@inproceedings{7e03dc0bc98e4d56829c4257ab1a3816,

title = "Global and dynamic shimming with the scanner{\textquoteright}s inbuilt shim system and a custom-made multi-coil setup at 9.4 T",

abstract = "The homogenization of static magnetic field (B0) is necessary for MR imaging. The unwanted B0 inhomogeneity becomes more pronounced in ultra high field, and the scanner's inbuilt shim setup can not compensate the B0 fluctuation as is needed. Here we propose to use combined setup of the multi-coil approach and the scanner's shim setup to achieve higher homogeneity of B0 field. We employed custom-built multi-coil for slice-wise shimming in combination with the scanner's shim setup for global shimming. The results show improvement about 50% compare to dynamic shimming alone in the most of the slices.",

author = "Alireza Aghaeifar and Irena Zivkovic and Mirkes, {Christian C.} and Theodor Steffen and Klaus Scheffler",

year = "2017",

language = "English",

booktitle = "25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine",

note = "25th ISMRM Annual Meeting and Exhibition, ISMRM2017 ; Conference date: 11-04-2017 Through 27-04-2017",

url = "https://www.ismrm.org/2017-annual-meeting-exhibition/",

}

Aghaeifar, A, Zivkovic, I, Mirkes, CC, Steffen, T & Scheffler, K 2017, Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T. in 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine . Honolulu, USA, 25th ISMRM Annual Meeting and Exhibition, Honolulu, United States, 11/04/17.

Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T. / Aghaeifar, Alireza; Zivkovic, Irena; Mirkes, Christian C.; Steffen, Theodor; Scheffler, Klaus.

25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine . Honolulu, USA, 2017.

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

TY - GEN

T1 - Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T

AU - Aghaeifar, Alireza

AU - Zivkovic, Irena

AU - Mirkes, Christian C.

AU - Steffen, Theodor

AU - Scheffler, Klaus

PY - 2017

Y1 - 2017

N2 - The homogenization of static magnetic field (B0) is necessary for MR imaging. The unwanted B0 inhomogeneity becomes more pronounced in ultra high field, and the scanner's inbuilt shim setup can not compensate the B0 fluctuation as is needed. Here we propose to use combined setup of the multi-coil approach and the scanner's shim setup to achieve higher homogeneity of B0 field. We employed custom-built multi-coil for slice-wise shimming in combination with the scanner's shim setup for global shimming. The results show improvement about 50% compare to dynamic shimming alone in the most of the slices.

AB - The homogenization of static magnetic field (B0) is necessary for MR imaging. The unwanted B0 inhomogeneity becomes more pronounced in ultra high field, and the scanner's inbuilt shim setup can not compensate the B0 fluctuation as is needed. Here we propose to use combined setup of the multi-coil approach and the scanner's shim setup to achieve higher homogeneity of B0 field. We employed custom-built multi-coil for slice-wise shimming in combination with the scanner's shim setup for global shimming. The results show improvement about 50% compare to dynamic shimming alone in the most of the slices.

M3 - Conference contribution

BT - 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine

CY - Honolulu, USA

T2 - 25th ISMRM Annual Meeting and Exhibition

Y2 - 11 April 2017 through 27 April 2017

ER -