Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

Hampus Olsson; Mads Andersen; Mustafa Kadhim; Gunther Helms

Simultaneous 3D T₁ and B₁⁺ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

Hampus Olsson, Mads Andersen, Mustafa Kadhim, Gunther Helms

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

Sammanfattning

MP2RAGE has become popular for T₁ mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T₁* from the signals, both T₁ and B₁⁺ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T₁ and flip angle-mapping protocol.

Originalspråk	engelska
Titel på värdpublikation	Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition
Utgivningsort	Concord, CA
Förlag	International Society for Magnetic Resonance in Medicine
Volym	29
Status	Published - 2021 apr. 30
Evenemang	ISMRM and SMRT Annual Meeting and Exhibition 2021 - virtual Varaktighet: 2021 maj 15 → 2021 maj 20

Publikationsserier

Namn	Proc Intl Soc Magn Reson Med
Förlag	Intl. Society for Magnetic Resonance in Medicine (ISMRM)
Volym	29
ISSN (elektroniskt)	1545-4428

Konferens

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

Ämnesklassifikation (UKÄ)

Radiologi och bildbehandling

Tillgång till dokument

https://index.mirasmart.com/ISMRM2021/PDFfiles/0550.htmlLicens: Ospecificerad

Andra filer och länkar

ProcISMRM29-0550

1 Doktorsavhandling (sammanläggning)

Gradient echo-based quantitative MRI of human brain at 7T: Mapping of T1, MT saturation and local flip angle
Olsson, H., 2021 okt. 5, Lund: Media-Tryck, Lund University, Sweden. 192 s.
Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)

Öppen tillgång
Fil

3 Avslutade

Högupplöst T1 kartering av hjärnan med MP2RAGE
Kadhim, M. (Forskarstuderande), Olsson, H. (Forskare) & Helms, G. (PI)
2020/08/31 → 2021/01/29
Projekt: Forskning

Fil
Multiparametric mapping of the brain at 7T using gradient echoes
Helms, G. (PI), Olsson, H. (Forskarstuderande) & Andersen, M. (Forskare)
2016/11/01 → 2020/11/01
Projekt: Forskning

Fil
Gradient echo-based quantitative MRI of human brain at 7T
Olsson, H. (Forskare), Andersen, M. (Biträdande handledare), Wirestam, R. (Biträdande handledare) & Helms, G. (Handledare)
2016/11/01 → 2021/10/29
Projekt: Avhandling

Lund University Bioimaging Centre
Westergren-Thorsson, G. (Manager)
Medicinska fakulteten
Infrastruktur

1 Inbjuden talare

3D T1&B1 mapping at 7T using MPRAGE
Olsson, H. (Inbjuden talare)
2021 maj 26
Aktivitet: Föredrag eller presentation › Inbjuden talare

2021 ISMRM Merit Award - summa cum laude
Olsson, H. (Mottagare), 2021 maj 19
Pris: Pris (inklusive medaljer och utmärkelser)

Fil

Citera det här

Olsson, H., Andersen, M., Kadhim, M., & Helms, G. (2021). Simultaneous 3D T₁ and B₁⁺ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE). I Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition (Vol. 29). Artikel 0550 (Proc Intl Soc Magn Reson Med; Vol. 29). International Society for Magnetic Resonance in Medicine. https://index.mirasmart.com/ISMRM2021/PDFfiles/0550.html

@inproceedings{e2e59d090ad5425e9372a616901cd997,

title = "Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)",

abstract = "MP2RAGE has become popular for T1 mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T1* from the signals, both T1 and B1+ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T1 and flip angle-mapping protocol.",

author = "Hampus Olsson and Mads Andersen and Mustafa Kadhim and Gunther Helms",

year = "2021",

month = apr,

day = "30",

language = "English",

volume = "29",

series = "Proc Intl Soc Magn Reson Med",

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

booktitle = "Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition",

note = "ISMRM and SMRT Annual Meeting and Exhibition 2021 ; Conference date: 15-05-2021 Through 20-05-2021",

}

Olsson, H, Andersen, M, Kadhim, M & Helms, G 2021, Simultaneous 3D T₁ and B₁⁺ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE). i Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition. vol. 29, 0550, 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/0550.html>

Simultaneous 3D T₁ and B₁⁺ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE). / Olsson, Hampus; Andersen, Mads; Kadhim, Mustafa et al.
Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition. Vol. 29 Concord, CA: International Society for Magnetic Resonance in Medicine, 2021. 0550 (Proc Intl Soc Magn Reson Med; Vol. 29).

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

TY - GEN

T1 - Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

AU - Olsson, Hampus

AU - Andersen, Mads

AU - Kadhim, Mustafa

AU - Helms, Gunther

PY - 2021/4/30

Y1 - 2021/4/30

N2 - MP2RAGE has become popular for T1 mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T1* from the signals, both T1 and B1+ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T1 and flip angle-mapping protocol.

AB - MP2RAGE has become popular for T1 mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T1* from the signals, both T1 and B1+ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T1 and flip angle-mapping protocol.

M3 - Paper in conference proceeding

VL - 29

T3 - Proc Intl Soc Magn Reson Med

BT - Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition

PB - International Society for Magnetic Resonance in Medicine

CY - Concord, CA

T2 - ISMRM and SMRT Annual Meeting and Exhibition 2021

Y2 - 15 May 2021 through 20 May 2021

ER -

Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

Sammanfattning

Publikationsserier

Konferens

Ämnesklassifikation (UKÄ)

Tillgång till dokument

Andra filer och länkar

Fingeravtryck

Forskningsoutput

Gradient echo-based quantitative MRI of human brain at 7T: Mapping of T1, MT saturation and local flip angle

Projekt

Högupplöst T1 kartering av hjärnan med MP2RAGE

Multiparametric mapping of the brain at 7T using gradient echoes

Gradient echo-based quantitative MRI of human brain at 7T

Utrustning

Lund University Bioimaging Centre

Aktiviteter

3D T1&B1 mapping at 7T using MPRAGE

Priser

2021 ISMRM Merit Award - summa cum laude

Citera det här

Simultaneous 3D T₁ and B₁⁺ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)