Novel approach to stationary transmission scanning using Compton scattered radiation.
Phys Med Biol
; 52(15): 4615-32, 2007 Aug 07.
Article
de En
| MEDLINE
| ID: mdl-17634654
ABSTRACT
Transmission scanning-based estimation of the attenuation map plays a crucial role in quantitative radionuclide imaging. X-ray computed tomography (CT) reconstructs directly the attenuation coefficients map from data transmitted through the object. This paper proposes an alternative route for reconstructing the object attenuation map by exploiting Compton scatter of transmitted radiation from an externally placed radionuclide source. In contrast to conventional procedures, data acquisition is realized as a series of images parameterized by the Compton scattering angle and registered on a stationary gamma camera operating without spatial displacement. Numerical simulation results using realistic voxel-based phantoms are presented to illustrate the efficiency of this new transmission scanning approach for attenuation map reconstruction. The encouraging results presented in this paper may suggest the possibility of proposing a new concept for emission/transmission imaging using scattered radiation, which has many advantages compared to conventional technologies.
Recherche sur Google
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Algorithmes
/
Interprétation d'images assistée par ordinateur
/
Amélioration d'image
/
Tomoscintigraphie
/
Imagerie tridimensionnelle
Type d'étude:
Diagnostic_studies
/
Evaluation_studies
/
Prognostic_studies
Limites:
Humans
Langue:
En
Journal:
Phys Med Biol
Année:
2007
Type de document:
Article
Pays d'affiliation:
France