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Titolo:
CHEST-WALL AND LUNG-VOLUME ESTIMATION BY OPTICAL REFLECTANCE MOTION ANALYSIS
Autore:
CALA SJ; KENYON CM; FERRIGNO G; CARNEVALI P; ALIVERTI A; PEDOTTI A; MACKLEM PT; ROCHESTER DF;
Indirizzi:
MONTREAL CHEST HOSP,3650 ST URBAIN MONTREAL PQ H2X 2P4 CANADA MCGILL UNIV,MEAKINS CHRISTIE LABS MONTREAL PQ H2X 2P2 CANADA FDN DON GNOCCHI,POLITECN MILAN,CTR BIOINGN I-20148 MILAN ITALY
Titolo Testata:
Journal of applied physiology
fascicolo: 6, volume: 81, anno: 1996,
pagine: 2680 - 2689
SICI:
8750-7587(1996)81:6<2680:CALEBO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIB CAGE; PLETHYSMOGRAPH; CALIBRATION; MOVEMENT; MODEL;
Keywords:
CHEST WALL MOTION; IMAGING; RESPIRATORY MECHANICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
S.J. Cala et al., "CHEST-WALL AND LUNG-VOLUME ESTIMATION BY OPTICAL REFLECTANCE MOTION ANALYSIS", Journal of applied physiology, 81(6), 1996, pp. 2680-2689

Abstract

Estimation of chestwall motion by surface measurements only allows one-dimensional measurements of the chest wall. We have assessed an optical reflectance system (OR), which tracks reflective markers in three dimensions (3-D) for respiratory use. We used 86 (6-mm-diameter) hemispherical reflective markers arranged circumferentially on the chest wall in seven rows between the sternal notch and the anterior superior iliac crest in two normal standing subjects. We calculated the volume of the entire chest wall and compared inspired and expired volumes withvolumes obtained by spirometry. Marker positions were recorded by four TV cameras; two were 4 m in front of and two were 4 m behind the subject. The TV signals were sampled at 100 Hz and combined with grid calibration parameters on a personal computer to obtain the 3-D coordinates of the markers. Chest wall surfaces were reconstructed by triangulation through the point data, and chest wall volume was calculated. During tidal breathing and vital capacity maneuvers and during CO2-stimulated hyperpnea, there was a very close correlation of the lung volumes(VL) estimated by spirometry [VL(SP)] and OR [VL(OR)]. Regression equations of VL(OR) (y) vs. VL(SP) (x, BTPS in liters) for the two subjects were given by y = 1.01x - 0.01 (r = 0.996) and y = 0.96x + 0.03 (r = 0.997), and by y = 1.04x + 0.25 (r = 0.97) and y = 0.98x + 0.14 (r =0.95) for the two maneuvers, respectively. We conclude spirometric volumes can be estimated very accurately and directly from chest wall surface markers, and we speculate that OR may be usefully applied to calculations of chest wall shape, regional volumes, and motion analysis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 08:04:50