A spectral interior CT by a framelet-based reconstruction algorithm.
J Xray Sci Technol
; 24(6): 771-785, 2016 11 22.
Article
en En
| MEDLINE
| ID: mdl-27911354
ABSTRACT
Reducing radiation dose is an important goal in medical computed tomography (CT), for which interior tomography is an effective approach. There have been interior reconstruction algorithms for monochromatic CT, but in reality, X-ray sources are polychromatic. Using a polychromatic acquisition model and motivated by framelet-based image processing algorithms, in this paper, we propose an interior reconstruction algorithm to obtain an image with spectral information assuming only one scan with a current energy-integrating detector. This algorithm is a new nonlinear iterative method by minimizing a special functional under a polychromatic acquisition model for X-ray CT, where the attenuation coefficients are energy-dependent. Experimental results validate that our algorithm can effectively reduce the beam-hardening artifacts and metal artifacts. It also produces color overlays which are useful in tumor identification and quantification.
Palabras clave
Buscar en Google
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Algoritmos
/
Procesamiento de Imagen Asistido por Computador
/
Tomografía Computarizada por Rayos X
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
J Xray Sci Technol
Asunto de la revista:
RADIOLOGIA
Año:
2016
Tipo del documento:
Article
País de afiliación:
China