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Michael Ljungberg

Michael Ljungberg

Professor

Michael Ljungberg

The Influence of Phantom Size, Shape, and Density, and Collimator Selection on the Dual Photopeak Scatter Correction Method

Författare

  • George J Hademenos
  • Michael A King
  • Michael Ljungberg

Summary, in English

Results from a Monte Carlo investigation are presented for the application of the dual photopeak window (DPW) scatter correction method to phantom geometries of varying shapes, sizes, and densities as well as to several collimators. A Monte Carlo program was used to simulate a Tc-99m point source at locations of 0.5 cm from the phantom surface, at the center, 0.5 cm from the bottom, and 4/5 the distance lateral from the center for each case of variation. DPW was then used to correct for scatter using a regression relation determined for a 30.5 cm×23.0 cm water-filled elliptical tub phantom using an ultrahigh resolution collimator. The application of DPW in all cases accounted for an approximate twelve-fold reduction in scatter fraction with an excellent agreement between the true scatter and scatter estimate distributions both at the tails and under the peak of the point spread functions.

Avdelning/ar

  • Medicinsk strålningsfysik, Lund

Publiceringsår

1994

Språk

Engelska

Sidor

364-368

Publikation/Tidskrift/Serie

IEEE Transactions on Nuclear Science

Volym

41

Issue

1-2

Dokumenttyp

Artikel i tidskrift

Förlag

IEEE - Institute of Electrical and Electronics Engineers Inc.

Ämne

  • Radiology, Nuclear Medicine and Medical Imaging

Aktiv

Published

ISBN/ISSN/Övrigt

  • ISSN: 0018-9499