Maximum likelihood resolution recovery in X-ray CT with an extended focal spot

Author

Stayman, J. Webster

Author_Institution

Xoran Technol. Inc. Ann Arbor, Ann Arbor

Volume

4

fYear

2007

fDate

Oct. 26 2007-Nov. 3 2007

Firstpage

2644

Lastpage

2645

Abstract

This paper presents a method for recovering resolution in X-ray computed tomographic (CT) systems where the projection of an extended focal spot onto the detector results in significant blur. This system blur is shift-variant and depends on the exact geometry of the CT system and the shape of the focal spot. The responses for the likelihood-based reconstructions show improved resolution over traditional FBP; however, the resolution properties are space-variant and anisotropic in both cases.

Keywords

computerised tomography; image reconstruction; image resolution; maximum likelihood estimation; medical image processing; X-ray CT; X-ray computed tomographic systems; extended focal spot; likelihood-based reconstruction; maximum likelihood resolution recovery; Anodes; Attenuation measurement; Computed tomography; Electron tubes; Image reconstruction; Maximum likelihood detection; Nuclear and plasma sciences; Volume measurement; X-ray detection; X-ray detectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE

Conference_Location

Honolulu, HI

ISSN

1095-7863

Print_ISBN

978-1-4244-0922-8

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2007.4436690

Filename

4436690