Data consistency condition for truncated projections in fan-beam geometry.
J Xray Sci Technol
; 23(5): 627-38, 2015.
Article
en En
| MEDLINE
| ID: mdl-26409430
ABSTRACT
It is well known that CT projections are redundant. Over the past decades, significant efforts have been devoted to characterize the data redundancy in different aspects. Very recently, Clackdoyle and Desbat reported a new integral-type data consistency condition (DCC) for truncated 2D parallel-beam projections, which can be applied to a region inside a field of view (FOV) but outside of the convex hull of the compact support of an object. Inspired by their work, here we derive a more general condition for 2D fan-beam geometry with a general scanning trajectory. This extended DCC is verified with simulated projections of the Shepp-Logan phantom and a clinically collected sinogram. Then, we demonstrate an application of the proposed DCC.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Procesamiento de Imagen Asistido por Computador
/
Tomografía Computarizada por Rayos X
Límite:
Humans
Idioma:
En
Revista:
J Xray Sci Technol
Asunto de la revista:
RADIOLOGIA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos