Traitement des images acquises dans le cadre du projet Modatos

VIII.4.Annexe 4 : Corrélations entre paramètres

	BVTV	BS/BV	Tb.Th	Tb.Th*	Tb.Sp	Tb.Sp*	Tb.N	DA	DA 2D
BV/TV	1,00	-0,56	0,61	0,44	-0,84	-0,62	0,88	0,44	0,20
BS/BV	-0,56	1,00	-0,98	-0,89	0,15	-0,15	-0,13	0,00	-0,18
Tb.Th	0,61	-0,98	1,00	0,91	-0,20	0,10	0,18	-0,04	0,15
Tb.Th* moy	0,44	-0,89	0,91	1,00	-0,03	0,16	0,03	-0,18	0,06
Tb.Sp	-0,84	0,15	-0,20	-0,03	1,00	0,82	-0,94	-0,49	-0,10
Tb.Sp* moy	-0,62	-0,15	0,10	0,16	0,82	1,00	-0,82	-0,40	0,07
Tb.N	0,88	-0,13	0,18	0,03	-0,94	-0,82	1,00	0,50	0,12
DA	0,44	0,00	-0,04	-0,18	-0,49	-0,40	0,50	1,00	0,65
DA 2D	0,20	-0,18	0,15	0,06	-0,10	0,07	0,12	0,65	1,00

Tableau 17 : Corrélations entre paramètres morphométriques.

IX.Références

1 Il s’agit de la pile b pour la première série d’échantillons, et de la pile a pour la deuxième série.

2 Le cas où la zone de recouvrement s’étale sur un nombre non-entier de pixels peut être traité en interpolant les coupes successives. Cette méthode a été testée, mais elle présente le désavantage de rendre les images plus floues. Elle n’a donc pas été retenue pour la suite.

3 Nous avons utilisé le logiciel Amira qui permet la visualisation simultanée en 3D de deux coupes perpendiculaires (e.g. une coupe z et une coupe x) que l’on peut déplacer indépendamment.

4 Une estimation de ces limites peut également être obtenue à partir des projections selon z des volumes trabéculaires, mais cette méthode est moins précise.

5 Les coordonnées du centre du cylindre, le rayon et le diamètre de celui-ci ont été stockés en format texte pour des traitements ultérieurs.

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