Journal Article

FZJ-2015-03542

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Analysis of proton-density bias corrections based on T 1 measurement for robust quantification of water content in the brain at 3 Tesla

Abbas, Z.FZJ* ; Gras, V. ; Möllenhoff, K.FZJ* ; Keil, F. ; Oros-Peusquens, A.-M.FZJ* ; Shah, N. J. (Corresponding Author)FZJ*

2014
Wiley-Liss New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1002/mrm.25086

Abstract: PurposeEstimating tissue water content using high field MRI, such as 3 Tesla (T), is challenging due to the difficulty in dissociating the radio frequency inhomogeneity pattern from the signal arising from tissue intrinsic proton density (PD) variations. To overcome this problem the longitudinal relaxation time T1 can be combined with an initial guess of the PD to yield the desired PD bias correction. However, it is necessary to know whether T1 effects, i.e., any effect contributing to T1 while being independent of tissue hydration, influence the estimated correction.MethodsTwenty-five healthy subjects underwent a quantitative 3T MRI protocol enabling acquisition of 64 slices with 1 mm in-plane resolution and 2 mm slice thickness in 14 min. Influence of T1 effects on the estimated water content map is evaluated using a dedicated method including T1 and T2* information and region of interest-based water content values are compared with the literature.ResultsOur analysis indicates that the PD bias correction based on T1 is largely insensitive to T1 effects. Besides, water content results are in good agreement with literature values obtained at 1.5T.ConclusionThis study demonstrates the applicability of a PD bias correction based on T1 to yield tissue water content at 3T.

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Contributing Institute(s):

1. Physik der Medizinischen Bildgebung (INM-4)
2. JARA-BRAIN (JARA-BRAIN)

Research Program(s):

1. 332 - Imaging the Living Brain (POF2-332) (POF2-332)

Appears in the scientific report 2015

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Database coverage:
; BIOSIS Previews ; Current Contents - Clinical Medicine ; Current Contents - Life Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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