Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging

Karen J. LaCroix, Benjamin Tsui

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This study investigated the use of half-fanbeam collimation with a 90° dual-detector system for myocardial SPECT imaging. The detection efficiency as a function of focal length was evaluated to determine if an optimal focal length exists. Second, sinograms were constructed and a simulation study was performed to determine if there is an optimal camera rotation which maximizes the total acquired myocardial counts while providing sufficient angular sampling for the myocardial region. Finally, image artifacts for various camera rotations were evaluated using simulated and experimental data. There exists an optimal collimator focal length for a given ROR; it varies with ROR. Relative to parallel collimation, the detection efficiency for half-fanbeam collimation is roughly 20% greater, for the same spatial resolution. The theoretical minimum camera rotation for complete sampling of the myocardial region ranges from 123° to 145° for RORs ranging from 13 to 25 cm, respectively. The total number of acquired myocardial counts is relatively constant for camera rotations of 135° to 360°. Myocardial SPECT images reconstructed iteratively with attenuation compensation from half-fanbeam data collected over camera rotations ranging from 135° to 360° showed no artifacts in the myocardial region. We conclude that a camera rotation of 180° centered at 45° left anterior oblique is a good, practical minimum rotation. Half-fanbeam collimation is a strong alternative system configuration for myocardial SPECT.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
PublisherIEEE
Pages1189-1193
Number of pages5
Volume2
ISBN (Print)0780350227
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can
Duration: Nov 8 1998Nov 14 1998

Other

OtherProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record
CityToronto, Que, Can
Period11/8/9811/14/98

Fingerprint

Detectors
Imaging techniques
Cameras
Sampling

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

LaCroix, K. J., & Tsui, B. (1999). Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging. In IEEE Nuclear Science Symposium and Medical Imaging Conference (Vol. 2, pp. 1189-1193). IEEE.

Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging. / LaCroix, Karen J.; Tsui, Benjamin.

IEEE Nuclear Science Symposium and Medical Imaging Conference. Vol. 2 IEEE, 1999. p. 1189-1193.

Research output: Chapter in Book/Report/Conference proceedingChapter

LaCroix, KJ & Tsui, B 1999, Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging. in IEEE Nuclear Science Symposium and Medical Imaging Conference. vol. 2, IEEE, pp. 1189-1193, Proceedings of the 1998 IEEE Nuclear Science Symposium Conference Record, Toronto, Que, Can, 11/8/98.
LaCroix KJ, Tsui B. Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging. In IEEE Nuclear Science Symposium and Medical Imaging Conference. Vol. 2. IEEE. 1999. p. 1189-1193
LaCroix, Karen J. ; Tsui, Benjamin. / Investigation of 90° dual-detector half-fanbeam collimation for myocardial SPECT imaging. IEEE Nuclear Science Symposium and Medical Imaging Conference. Vol. 2 IEEE, 1999. pp. 1189-1193
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