Performance of evaluation of a new image acquisition strategy in pinhole SPECT: A simulation study

Tsutomu Zeniya, Hiroshi Watabe, Toshiyuki Aoi, Atsuko Kubo, Hidehiro Iida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Non-uniform spatial resolution or axial blurring is a major limitation in conventional pinhole SPECT, which is largely attributed to incompleteness of the acquired projection data sets. Recently, we have experimentally demonstrated that the non-uniform spatial resolution could be improved by a new design of the pinhole orbit that satisfies the completeness of pinhole SPECT reconstruction (Tuy's condition). This study was intended to evaluate systematically the effect of our two-circular orbit system by a computer simulation and to examine an effective oblique angle about the additional orbit of two orbits. A numerical multiple-disk phantom with seven disks was used. Forwarded projection data without noise and with Gaussian noise were used to evaluate the axial spatial resolution uniformity and the statistical noise property, respectively. The angles of the additional orbit were chosen every 15° in the range from 0° to 75° for object's axis. Single and two-orbit data were reconstructed by 3D-OSEM method for pinhole SPECT. Our simulation showed two-orbit acquisition of any combinations was significantly effective for the improvement of both spatial resolution uniformity (81 - 93% at the edge disk of the phantom) and statistical noise property (69 - 88% at the edge disk of the phantom) compared with single orbit acquisition. Especially, combination of 90° and 60° orbits resulted in the best performance among other orbital combinations.

Original languageEnglish
Title of host publication2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference
Pages1774-1776
Number of pages3
DOIs
Publication statusPublished - 2005 Dec 1
Externally publishedYes
EventNuclear Science Symposium Conference Record, 2005 IEEE - , Puerto Rico
Duration: 2005 Oct 232005 Oct 29

Publication series

NameIEEE Nuclear Science Symposium Conference Record
Volume3
ISSN (Print)1095-7863

Other

OtherNuclear Science Symposium Conference Record, 2005 IEEE
CountryPuerto Rico
Period05/10/2305/10/29

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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