| Scanner uniformity improvements for radiochromic film analysis with matt reflectance backing. | |
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MedLine Citation:
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PMID: 21735295 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A simple and reproducible method for increasing desktop scanner uniformity for the analysis of radiochromic films is presented. Scanner uniformity, especially in the non-scan direction, for transmission scanning is well known to be problematic for radiochromic film analysis and normally corrections need to be applied. These corrections are dependant on scanner coordinates and dose level applied which complicates dosimetry procedures. This study has highlighted that using reflectance scanning in combination with a matt, white backing material instead of the conventional gloss scanner finish, substantial increases in the scanner uniformity can be achieved within 90% of the scanning area. Uniformity within ±1% over the scanning area for our epsonV700 scanner tested was found. This is compared to within ±3% for reflection scanning with the gloss backing material and within ±4% for transmission scanning. The matt backing material used was simply 5 layers of standard quality white printing paper (80 g/m(2)). It was found that 5 layers was the optimal result for backing material however most of the improvements were seen with a minimum of 3 layers. Above 5 layers, no extra benefit was seen. This may eliminate the need to perform scanner corrections for position on the desktop scanners for radiochromic film dosimetry. |
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Authors:
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Ethan Butson; Hani Alnawaf; Peter K N Yu; Martin Butson |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-7-7 |
Journal Detail:
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Title: Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine Volume: - ISSN: 0158-9938 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-7-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8208130 Medline TA: Australas Phys Eng Sci Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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The Illawarra Grammar School (TIGS), Western Ave, Mangerton, NSW, 2500, Australia, diamonds.for.you@hotmail.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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