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Titolo:
Utilizing the diffusion-to-noise ratio to optimize magnetic resonance diffusion tensor acquisition strategies for improving measurements of diffusionanisotropy
Autore:
Armitage, PA; Bastin, ME;
Indirizzi:
Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England Univ Oxford Oxford England OX1 3PJ ept Engn Sci, Oxford OX1 3PJ, England Univ Edinburgh, Western Gen Hosp, Dept Med Phys & Med Engn, Edinburgh, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland burgh, Midlothian, Scotland
Titolo Testata:
MAGNETIC RESONANCE IN MEDICINE
fascicolo: 6, volume: 45, anno: 2001,
pagine: 1056 - 1065
SICI:
0740-3194(200106)45:6<1056:UTDRTO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN BRAIN; SELF-DIFFUSION; B-MATRIX; SCHIZOPHRENIA; SPECTROSCOPY; COEFFICIENT; PERFUSION; STROKE; WATER; ECHO;
Keywords:
magnetic resonance imaging; diffusion tensor imaging; diffusion anisotropy; diffusion-to-noise ratio; optimized acquisition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Armitage, PA Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, EnglandUniv Oxford Parks Rd Oxford England OX1 3PJ OX1 3PJ, England
Citazione:
P.A. Armitage e M.E. Bastin, "Utilizing the diffusion-to-noise ratio to optimize magnetic resonance diffusion tensor acquisition strategies for improving measurements of diffusionanisotropy", MAGN RES M, 45(6), 2001, pp. 1056-1065

Abstract

It is well known that quantitative anisotropy measurements derived from the diffusion tenser are extremely sensitive to noise contamination, The level of noise in the diffusion tenser imaging (DTI) experiment is usually measured from some estimate of the signal-to-noise ratio (SNR) in the componentdiffusion-weighted (DW) images. This measure is, however, highly dependenton experimental parameters, such as the diffusion attenuation b-value and the diffusion coefficient of the subject. Conversely the diffusion-to-noiseratio (DNR), defined as the SNR of the calculated diffusion tenser trace map, provides a reliable estimate of noise contamination, which is largely independent of such parameters. In this work it is demonstrated how reliableanisotropy measurements can be obtained using an image acquisition strategy that optimizes the DNR of the DTI experiment, This acquisition scheme is shown to provide noise-independent measurements of typical diffusion anisotropy values found in the human brain. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/08/20 alle ore 18:57:23