[Effect of Reconstruction Technique for Metal Artifact Reduction in Computed Tomography by Changing Display Field of View].
Nihon Hoshasen Gijutsu Gakkai Zasshi
; 71(11): 1096-102, 2015 Nov.
Article
en Ja
| MEDLINE
| ID: mdl-26596201
We evaluated the effect of orthopedic-metal artifact reduction (O-MAR) for metal artifact in computed tomography with 73 simulated seeds for brachytherapy in different sizes of display field of view (DFOV) obtained by helical scan under the same clinical scan condition. The metal artifacts were analyzed with the Gumbel's method by changing DFOV sizes 80 mm, 160 mm, and 320 mm. Gumbel distribution, scale parameter (γ), and location parameter (ß) of the metal artifacts with O-MAR were compared with that of the metal artifacts with filtered back projection (FBP). In conclusion, it was considered that the effect of metal artifact reduction with O-MAR was influenced by DFOV size in this study. The reduction rates of scale parameter (γ) were 22.3%, 21.3%, and 10.0% in DFOV 80 mm, 160 mm, and 320 mm, respectively. The reduction rates of location parameter (ß) were 27.4%, 23.4 %, and 9.8%. Therefore, the effect of metal artifact reduction with O-MAR showed the tendency of increasing with decreasing DFOV size.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tomografía Computarizada por Rayos X
/
Artefactos
Idioma:
Ja
Revista:
Nihon Hoshasen Gijutsu Gakkai Zasshi
Año:
2015
Tipo del documento:
Article
Pais de publicación:
Japón