Accurate image reconstruction with the source space tree algorithm (SSTA) for Compton CT

Author

Ohta, Jin ; Ogawa, Koichi

Author_Institution

Graduate Sch. of Eng., Hosei Univ., Tokyo, Japan

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

698

Abstract

This paper describes a new method for reconstructing an accurate image with a Compton camera. In the backprojection of Compton CT data with the source space tree algorithm (SSTA) we have to decide on octants intersecting the cone surface. With the conventional algorithm this judgement was sometimes incorrect and this caused artifacts on a reconstructed image. The proposed method is not based on the critical radius as is used in the conventional SSTA, but on the octant itself. Thus the algorithm produces correctly tagged octants and no artifact in a reconstructed image. Results obtained by simulations showed the performance of the proposed method

Keywords

cameras; gamma-ray apparatus; image reconstruction; medical image processing; single photon emission computed tomography; trees (mathematics); Compton CT data; Compton camera; SPECT; backprojection; cone surface; gamma camera; image reconstruction; octants; simulations; single photon emission CT; source space tree algorithm; Cameras; Computed tomography; Data acquisition; Gamma ray detection; Gamma ray detectors; Image reconstruction; Optical collimators; Single photon emission computed tomography; Spatial resolution; Surface reconstruction;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2001. Proceedings. 2001 International Conference on

Conference_Location

Thessaloniki

Print_ISBN

0-7803-6725-1

Type

conf

DOI

10.1109/ICIP.2001.959141

Filename

959141