[Effects of Iterative Reconstruction on Image Quality of Pediatric Body Computed Tomography Images].
Nihon Hoshasen Gijutsu Gakkai Zasshi
; 76(10): 1035-1043, 2020.
Article
em Ja
| MEDLINE
| ID: mdl-33087649
ABSTRACT
This study evaluated the effects of three types of hybrid iterative reconstruction (IR) on image quality of pediatric body computed tomography images. The image quality components evaluated were noise power spectrum (NPS), task-based modulation transfer function (TTF), and system performance function (SPF). As the IR strength was increased while reducing the radiation dose, the NPS increased in a low-frequency range and the TTF decreased in low-contrast regions. In the low-contrast regions, the calculated SPF decreased over the entire frequency range. Alternatively, in the high-contrast regions, the SPF decreased in the low-frequency regions and increased in the high-frequency regions. The radiation dose reduction using the hybrid IR resulted in the deterioration of the image quality in the low-contrast regions and changes in the spatial frequency characteristics in the high-contrast regions.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Algoritmos
/
Tomografia Computadorizada por Raios X
Limite:
Child
/
Humans
Idioma:
Ja
Revista:
Nihon Hoshasen Gijutsu Gakkai Zasshi
Ano de publicação:
2020
Tipo de documento:
Article