Light scattering artefacts in a funnel phantom using optical CT

Stephen G. Bosi, Saxby Brown, Sarvenaz Sarabipour, Yves De Deene, Clive Baldock

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A gelatin phantom containing a funnel-shaped region of high opacity (or optical density OD) was used to examine light-scattering induced artefacts in a cone-beam optical CT scanner used for gel dosimetry. To correctly simulate polymer gel dosimeters, the opacity was introduced by adding a colloidal scatterer to the gelatin. In line profiles of OD taken from 3-D reconstructions of the funnel, those profiles with a long pathlength through high OD regions exhibited a "dishing" artefact, while those of short pathlength exhibited the opposite effect - "doming". These phenomena are accounted for by a model that includes the effect of stray, scattered light.

Original languageEnglish
Article number012021
Pages (from-to)1-5
Number of pages5
JournalJournal of Physics: Conference Series
Volume164
DOIs
Publication statusPublished - 2009
Externally publishedYes

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