Noninvasive assessment method to determine the anatomic compatibility of an implantable artificial heart system

Citation
B. Zhang et al., Noninvasive assessment method to determine the anatomic compatibility of an implantable artificial heart system, ASAIO J, 46(5), 2000, pp. 590-595
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Research/Laboratory Medicine & Medical Tecnology
Journal title
ASAIO JOURNAL
ISSN journal
1058-2916 → ACNP
Volume
46
Issue
5
Year of publication
2000
Pages
590 - 595
Database
ISI
SICI code
1058-2916(200009/10)46:5<590:NAMTDT>2.0.ZU;2-V
Abstract
To assess the anatomic compatibility of an artificial heart (AH), we attemp ted to develop a computer environment that would facilitate a reliable simu lation of an AH implanted in the human thorax. A three-dimensional thoracic computer model with a ventricle-resected heart was constructed, by using m anually extracted contour points of the aorta, pulmonary artery, atria, atr ioventricular valves, diaphragm, and thoracic wall from a set of consecutiv e CT images. Such a model enabled simulation of an AH implantation by orien ting the AH model in it. Error evaluation on CT imaging and contour extract ion with a Plexiglas cylindrical phantom showed that the diameter of the ex tracted phantom contour was approximately 2 mm smaller than its original wi th a standard deviation of < 0.5 mm. Errors in contour and surface reconstr uction could be reduced to far less than 1 mm under constrained conditions. A study on the influence of breathing revealed that variations in some tho racic dimensions between inspiration and expiration could reach 10 mm. In s ummary, computer simulation of AH implantation is a worthwhile approach wit h acceptable accuracy, although further considerations of extreme thoracic situations will be required.