title: Evaluation of chest wall distortion related to cardiac activity by structured lights. A study of the apical impulse by the Moiré technique.
abstract: The use of structured lights and especially of the Moiré technique to evaluate chest wall distortion in front of the apical impulse allows a topographic study of the precordial movement in relation with cardiac activity. Shade Moiré technology offers the possibility to study a reduced area of the chest with a good enlargement effect and well contrasted fringes. Projected Moiré allows the study of an increased area of the chest (40 cm2) and provides less contrasted pictures with a reduced enlargement effect. Both techniques offer the possibility of automatic imaging. The study of a normal subject is realized with a topographic evaluation of the chest wall distortion on a endsystolic frame. 3D representation of the chest wall deformation is performed after image treatment on a endsystolic print.
mesh_terms: D006801:Humans; D007702:Kinetocardiography / Q000379:methods*; D055095:Optics and Photonics; D013599:Systole