Collimator Details

  • David Hamilton
Chapter

Abstract

Parallel hole collimators are ~25–80 mm thick and contain 3–9 × 104 holes. Originally the holes were circular but are now usually hexagonal, in low and medium energy collimators, and constructed by assembling strips of lead foil. High energy collimators still have round holes, although square or triangular holes are sometimes used in high sensitivity collimators. These tend to be constructed using a casting technique (IPSM 1992). The latter has been improved recently and, since the uniformity of cast collimators is generally better than that of foil, these are now recommended in low and medium energy collimators, especially for SPET (Moore et al. 1992).

References

Keywords

Attenuation Hexagonal Tungsten Lution Reso 

Abbreviations

FWHM

full width at half maximum

HE

high energy

LE

low energy

LSF

line spread function

ME

medium energy

PSF

point spread function

SPET

single photon emission tomography

UHE

ultra high energy

VHE

very high energy

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Connolly LP, Treves ST, Davis RT, Zimmerman RE (1999) Pediatric applications of pinhole magnification imaging. J Nucl Med 40:1896–1901PubMedGoogle Scholar
  2. IPSM (1992) Report 66 quality control of gamma cameras and associated computer systems. Institute of Physical Sciences in Medicine. LondonGoogle Scholar
  3. Moore SC, Kouris K, Cullum I (1992) Collimator design for single photon emission tomography. Eur J Nucl Med 19:138–150PubMedCrossRefGoogle Scholar
  4. Muehllehner G, Dudek J, Meyer R (1976) The influence of hole shape on collimator performance. Phys Med Biol 21:242–250PubMedCrossRefGoogle Scholar
  5. Sorenson JA, Phelps ME (1987) Physics in nuclear medicine, 2nd edn. Grune and Stratton, New YorkGoogle Scholar
  6. Tsui BMW, Gunter DL, Beck RN, Patton J (1996) Physics of collimator design. In: Sandler MP, Patton JA, Coleman RE, Gottschalk A, Wackers FJT, Hoffer PB (eds) Diagnostic nuclear medicine, 3rd edn. Williams and Wilkins, Baltimore, pp 67–79Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • David Hamilton
    • 1
  1. 1.Riyadh Al Kharj Hospital ProgrammeX990 Military HospitalRiyadhSaudi Arabia

Personalised recommendations