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Titolo:
Determination of regional pulmonary parenchymal strain during normal respiration using spin inversion tagged magnetization MRI
Autore:
Napadow, VJ; Mai, V; Bankier, A; Gilbert, RJ; Edelman, R; Chen, Q;
Indirizzi:
MIT, Dept Mech Engn, Cambridge, MA 02138 USA MIT Cambridge MA USA 02138MIT, Dept Mech Engn, Cambridge, MA 02138 USA
Titolo Testata:
JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 3, volume: 13, anno: 2001,
pagine: 467 - 474
SICI:
1053-1807(200103)13:3<467:DORPPS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
LUNG-VOLUMES; VISUALIZATION; MECHANICS; MOTION; TONGUE; CT;
Keywords:
lung; lung magnetic resonance imaging; lung biomechanics; tagged magnetization; strain mapping;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Napadow, VJ MIT, Dept Mech Engn, 77 Massachusetts Ave, Cambridge, MA 02138USA MIT 77 Massachusetts Ave Cambridge MA USA 02138 , MA 02138 USA
Citazione:
V.J. Napadow et al., "Determination of regional pulmonary parenchymal strain during normal respiration using spin inversion tagged magnetization MRI", J MAGN R I, 13(3), 2001, pp. 467-474

Abstract

In clinical practice, the assessment of lung mechanics is limited to a global physiological evaluation, which measures, in the aggregate, the contributions of the pulmonary parenchyma, pleura, and chest wall. In this study, we used an MR imaging methodology which applies two-dimensional bands of inverted magnetization directly onto the pulmonary parenchyma, thus allowing for the quantification of local pulmonary tissue deformation, or strain, throughout inhalation. Our results showed that the magnitude of strain was maximal at the base and apex of the lung, but was curtailed at the hilum, theanatomical site of the poorly mobile bronchial and vascular insertions. Inplane shear strain mapping showed mostly positive shear strain, predominantat the apex throughout inhalation, and increasing with expanding lung volume. Anisotropy mapping showed that superior-inferior axial strain was greater than medial-lateral axial strain at the apex and base, while the opposite was true for the middle lung field. This study demonstrates that localized pulmonary deformation can be measured in vivo with tagging AM, and quantified by applying finite strain definitions from continuum mechanics. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/02/20 alle ore 05:00:35