Bone mineral density on conventional and digitized images under different parameters of digitization and storage
Braz. j. oral sci
; 9(3): 398-401, July-Sept. 2010. tab, graf
Article
em En
| LILACS, BBO
| ID: lil-578063
Biblioteca responsável:
BR28.1
ABSTRACT
Aim:
To assess the bone mineral density on conventional and digitized images, comparing whether different parameters of digitization and storage change these values.Methods:
Twenty radiographs were taken from five partially dentulous dry mandibles with an aluminum 7-mm stepwedge placed on the superior edge of the film. After processing, the films were digitized with are solution of 600 and 2,400 d.p.i. and saved as TIFF and JPEG files. On every conventional and digitized image, circular regions of interest were selected for densitometry and radiographic contrast analysis.Results:
Pearsons correlation coefficient showed a significant and strong mean gray values association between digitized and conventional images, differing from radiographic contrast that did not show a significant association. A NOVA did not reveal a statistically significant difference in bone density and radiographic contrast among the four digitized image groups, but the conventional image contrast was significantly lower.Conclusions:
Bone mineral density did not differ in both conventional and digitized images. The parameters of image compression and resolution, tested in this study, did not change the results of densitometry and digitization process increased the radiographic contrast.Palavras-chave
Texto completo:
1
Base de dados:
BBO
/
LILACS
Assunto principal:
Processamento de Imagem Assistida por Computador
/
Radiografia Dentária
/
Densidade Óssea
/
Densitometria
Limite:
Humans
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil