A simple approach to control rms(B1) by pulse length in variable flip angle (VFA) T1 mapping of human brain

Gunther Helms

A simple approach to control rms(B₁) by pulse length in variable flip angle (VFA) T₁ mapping of human brain

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

Abstract

Controlling the saturation of bound magnetization in variable flip angle (VFA) experiments improves the derived parameter maps. Instead of using special CSMT RF pulses, we kept the rmsB₁ constant simply by increasing the RF pulse duration with the square of the flip angle. At 3T, VFA T₁ mapping of human brain thus showed better compliance to the Ernst equation than at constant pulse duration or B₁ amplitude, but yielded shorter T₁.

Original language	English
Title of host publication	Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition
Place of Publication	Concord, CA
Publisher	International Society for Magnetic Resonance in Medicine
Volume	29
Publication status	Published - 2021 Apr 30
Event	ISMRM and SMRT Annual Meeting and Exhibition 2021 - virtual Duration: 2021 May 15 → 2021 May 20

Publication series

Name	Proc Intl Soc Magn Reson Med
Publisher	Intl. Society for Magnetic Resoance in Medicine (ISMRM)
Volume	29
ISSN (Electronic)	1545-4428

Conference

Conference	ISMRM and SMRT Annual Meeting and Exhibition 2021
Period	2021/05/15 → 2021/05/20

Subject classification (UKÄ)

Radiology and Medical Imaging
Other Physics Topics

Access to Document

https://index.mirasmart.com/ISMRM2021/PDFfiles/3073.htmlLicence: Unspecified

Cite this

Helms, G. (2021). A simple approach to control rms(B₁) by pulse length in variable flip angle (VFA) T₁ mapping of human brain. In Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition (Vol. 29). Article 3073 (Proc Intl Soc Magn Reson Med; Vol. 29). International Society for Magnetic Resonance in Medicine. https://index.mirasmart.com/ISMRM2021/PDFfiles/3073.html

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title = "A simple approach to control rms(B1) by pulse length in variable flip angle (VFA) T1 mapping of human brain",

abstract = "Controlling the saturation of bound magnetization in variable flip angle (VFA) experiments improves the derived parameter maps. Instead of using special CSMT RF pulses, we kept the rmsB1 constant simply by increasing the RF pulse duration with the square of the flip angle. At 3T, VFA T1 mapping of human brain thus showed better compliance to the Ernst equation than at constant pulse duration or B1 amplitude, but yielded shorter T1.",

author = "Gunther Helms",

year = "2021",

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day = "30",

language = "English",

volume = "29",

series = "Proc Intl Soc Magn Reson Med",

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

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Helms, G 2021, A simple approach to control rms(B₁) by pulse length in variable flip angle (VFA) T₁ mapping of human brain. in Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition. vol. 29, 3073, Proc Intl Soc Magn Reson Med, vol. 29, International Society for Magnetic Resonance in Medicine, Concord, CA, ISMRM and SMRT Annual Meeting and Exhibition 2021, 2021/05/15. <https://index.mirasmart.com/ISMRM2021/PDFfiles/3073.html>

A simple approach to control rms(B₁) by pulse length in variable flip angle (VFA) T₁ mapping of human brain. / Helms, Gunther.
Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition. Vol. 29 Concord, CA: International Society for Magnetic Resonance in Medicine, 2021. 3073 (Proc Intl Soc Magn Reson Med; Vol. 29).

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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M3 - Paper in conference proceeding

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