Development of a CCD array imaging system for measurement of dose distributions in doped agarose gels

Tarte, B.J., Jardine, P.A., vanDoorn, T., Nitschke, K.N. and Poulsen, M.G. (1997) Development of a CCD array imaging system for measurement of dose distributions in doped agarose gels. Medical Physics, 24 9: 1521-1525. doi:10.1118/1.598041


Author Tarte, B.J.
Jardine, P.A.
vanDoorn, T.
Nitschke, K.N.
Poulsen, M.G.
Title Development of a CCD array imaging system for measurement of dose distributions in doped agarose gels
Journal name Medical Physics   Check publisher's open access policy
ISSN 0094-2405
Publication date 1997-09
Sub-type Article (original research)
DOI 10.1118/1.598041
Volume 24
Issue 9
Start page 1521
End page 1525
Total pages 5
Place of publication College Park, MD, United States
Publisher American Association of Physicists in Medicine
Language eng
Abstract An imaging system for agarose gel sections has been investigated for applications in rapid two-dimensional radiation dosimetry. The imaging system, with white light illumination and CCD camera detection, was designed for measurement of the radiation-induced optical density changes in iron- and xylenol orange dye-doped agarose gels. The performance of the imaging system was compared with that of a laser scanning system for the gels and with the accepted dosimetry standard, the ionization chamber. In measurement of beam profiles of two therapeutic radiation fields, relative dose values from the CCD camera imaging system were on average within 3% (ranging from 0.005% to 7.5%) of values recorded with a parallel plate ionization chamber. In comparison with the laser scanner, the CCD camera imaging system provided comparable spatial resolution and an increased rate of data acquisition, although a consistently reduced signal to noise ratio was observed. Suggestions for improving the camera imaging technique include noise reduction through camera cooling and further frame averaging.
Keyword Radiation dosimetry
Agarose gel
CCD camera
MRI
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
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