Preliminary investigation of imaging properties for sub-millimeter square pinholes

Dan Xia, Mi Ae Park, Stephen C. Moore, Scott D. Metzler

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

4 Scopus citations

Abstract

Recently, a square-pinhole collimator has been proposed for SPECT imaging since it can tile the projection onto the detector efficiently and the fields of view (FOVs) in transverse and axial directions become separable. In this work, we have conducted sensitivity and FOV experiments for eighteen fabricated platinum/iridium(Pt/Ir) inserts with sub-millimeter square-apertures. A sin qθ fit to the experimental sensitivity has been performed for these inserts. The mean (standard deviation) of fitted sensitivity exponents (q) and effective diameters (d) are 10.7 (1.3) and 0.35 mm (0.02 mm), which are close to the values obtained from the simulated sensitivity data generated using the geometric parameters of the designed inserts. From projections of the FOV on the detector, we have measured the acceptance angles in the transverse and axial directions. The measured mean (standard deviation) of transverse and axial half-acceptances are 17.33° (0.21°) and 15.03°(0.23°), which are in good agreement with the designed values (17.13° and 14.93°). These results show that the physical properties of the fabricated inserts with sub-millimeter aperture size match our design well.

Original languageEnglish (US)
Title of host publication2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479905348
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013 - Seoul, Korea, Republic of
Duration: Oct 27 2013Nov 2 2013

Publication series

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

Other

Other2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
CountryKorea, Republic of
CitySeoul
Period10/27/1311/2/13

ASJC Scopus subject areas

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

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