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Titolo:
High-resolution diffusion imaging using a radial turbo-spin-echo sequence:Implementation, eddy current compensation, and self-navigation
Autore:
Seifert, MHJ; Jakob, PM; Jellus, V; Haase, A; Hillenbrand, C;
Indirizzi:
Univ Wurzburg, Inst Phys, Lehrstuhl Expt Phys 5, D-8700 Wurzburg, Germany Univ Wurzburg Wurzburg Germany D-8700 t Phys 5, D-8700 Wurzburg, Germany Inst Measurement Sci, Bratislava, Slovakia Inst Measurement Sci Bratislava Slovakia ment Sci, Bratislava, Slovakia
Titolo Testata:
JOURNAL OF MAGNETIC RESONANCE
fascicolo: 2, volume: 144, anno: 2000,
pagine: 243 - 254
SICI:
1090-7807(200006)144:2<243:HDIUAR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTRAVOXEL INCOHERENT MOTION; ACUTE HUMAN STROKE; CE-FAST SEQUENCE; PROJECTION RECONSTRUCTION; IN-DIFFUSION; HUMAN BRAIN; ARTIFACTS; MRI; ACQUISITION; REDUCTION;
Keywords:
radial; diffusion imaging; turbo-spin-echo; high resolution; eddy current;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Hillenbrand, C Univ Wurzburg, Inst Phys, Lehrstuhl Expt Phys 5, D-8700 Wurzburg, Germany Univ Wurzburg Wurzburg Germany D-8700 0 Wurzburg, Germany
Citazione:
M.H.J. Seifert et al., "High-resolution diffusion imaging using a radial turbo-spin-echo sequence:Implementation, eddy current compensation, and self-navigation", J MAGN RES, 144(2), 2000, pp. 243-254

Abstract

This work describes a segmented radial turbo-spin-echo technique (DW-rTSE)for high-resolution multislice diffusion-weighted imaging and quantitativeADC mapping. Diffusion-weighted images with an in-plane resolution of 700 mu m and almost free of bulk motion can be obtained in vivo without cardiacgating. However, eddy currents and pulsatile brain motion cause severe artifacts when strong diffusion weighting is applied. This work explains in detail the artifacts in projection reconstruction (PR) imaging arising from eddy currents and describes an effective eddy current compensation based on the adjustment of gradient timing. Application of the diffusion gradients in all three orthogonal directions is possible without degradation of the images due to eddy current artifacts, allowing studies of the diffusional anisotropy. Finally, a self-navigation approach is proposed to reduce residualnonrigid body motion artifacts. Five healthy volunteers were examined to show the feasibility of this method. (C) 2000 Academic Press.

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Documento generato il 30/10/20 alle ore 10:02:05