Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study

X. He, Eric Frey, Benjamin Tsui, Xiaolei Song, B. M W Tsui

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

Abstract

The goal of this study is to evaluate the effects of collimator penetration and scatter on myocardial SPECT image quality. We chose two designs: a LEHR collimator for GE Millennium VG with a longer bore and thicker septa, and a LEHR collimator for Siemens E.CAM with a shorter bore and thinner septa. These two collimators have similar resolution properties, but very different penetration fractions. In addition, the Siemens collimator has higher detection efficiency. We used Monte Carlo (MC) simulation to simulate projection data from the 3D NCAT phantom. For each collimator, we generated three sets of projection data: one includes only the geometric components of the detected photons, one includes both the geometric and penetration components, and the other one includes geometric, penetration and collimator scatter effects. The resulting projections were reconstructed with OSEM including attenuation and geometric response compensation. For each collimator and reconstruction, we computed the defect contrast in a short axis slice. We found very small differences in defect contrast between the two collimators with and without penetration and collimator-scattered photons. Since the collimator with higher penetration had greater detection efficiency and showed no loss in defect contrast, a collimator with higher penetration fraction may be acceptable for use in Tc-99m myocardial perfusion imaging.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
EditorsS.D. Metzler
Pages2905-2909
Number of pages5
Volume4
StatePublished - 2003
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003

Other

Other2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference
CountryUnited States
CityPortland, OR
Period10/19/0310/25/03

Fingerprint

Defects
Photons
Computer aided manufacturing
Image quality
Imaging techniques
Monte Carlo simulation
Compensation and Redress

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

He, X., Frey, E., Tsui, B., Song, X., & Tsui, B. M. W. (2003). Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study. In S. D. Metzler (Ed.), IEEE Nuclear Science Symposium Conference Record (Vol. 4, pp. 2905-2909). [M11-263]

Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study. / He, X.; Frey, Eric; Tsui, Benjamin; Song, Xiaolei; Tsui, B. M W.

IEEE Nuclear Science Symposium Conference Record. ed. / S.D. Metzler. Vol. 4 2003. p. 2905-2909 M11-263.

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

He, X, Frey, E, Tsui, B, Song, X & Tsui, BMW 2003, Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study. in SD Metzler (ed.), IEEE Nuclear Science Symposium Conference Record. vol. 4, M11-263, pp. 2905-2909, 2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference, Portland, OR, United States, 10/19/03.
He X, Frey E, Tsui B, Song X, Tsui BMW. Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study. In Metzler SD, editor, IEEE Nuclear Science Symposium Conference Record. Vol. 4. 2003. p. 2905-2909. M11-263
He, X. ; Frey, Eric ; Tsui, Benjamin ; Song, Xiaolei ; Tsui, B. M W. / Comparison of penetration and scatter effects on defect contrast for GE and Siemens LEHR collimators in myocardial perfusion SPECT - A simulation study. IEEE Nuclear Science Symposium Conference Record. editor / S.D. Metzler. Vol. 4 2003. pp. 2905-2909
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