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Measurement of multi-slice computed tomography dose profile with the Dose Magnifying Glass and the MOSkin radiation dosimeter

Journal Article


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Abstract


  • This study describes the application of two in-house developed dosimeters, the Dose Magnifying Glass

    (DMG) and the MOSkin dosimeter at the Centre for Medical Radiation Physics, University of Wollongong,

    Australia, for the measurement of CT dose profiles for a clinical diagnostic 16-slice MSCT scanner. Two

    scanner modes were used; axial mode and helical mode, and the effect of varying beam collimation and

    pitch was studied. With an increase in beam collimation in axial mode and an increase of CT pitch in

    helical mode, cumulative point dose at scanner isocentre decreased while FWHM increased. There was

    generally good agreement to within 3% between the acquired dose profiles obtained by the DMG and the

    film except at dose profile tails, where film over-responded by up to 30% due to its intrinsic depth dose

    dependence at low doses.

Publication Date


  • 2013

Citation


  • Lian, C. P. L., Wong, J. Hsiu Ding., Young, A., Cutajar, D., Petasecca, M., Lerch, M. L. F. & Rosenfeld, A. B. (2013). Measurement of multi-slice computed tomography dose profile with the Dose Magnifying Glass and the MOSkin radiation dosimeter. Radiation Measurements, 55 51-55.

Scopus Eid


  • 2-s2.0-84880921693

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2221&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1212

Number Of Pages


  • 4

Start Page


  • 51

End Page


  • 55

Volume


  • 55

Abstract


  • This study describes the application of two in-house developed dosimeters, the Dose Magnifying Glass

    (DMG) and the MOSkin dosimeter at the Centre for Medical Radiation Physics, University of Wollongong,

    Australia, for the measurement of CT dose profiles for a clinical diagnostic 16-slice MSCT scanner. Two

    scanner modes were used; axial mode and helical mode, and the effect of varying beam collimation and

    pitch was studied. With an increase in beam collimation in axial mode and an increase of CT pitch in

    helical mode, cumulative point dose at scanner isocentre decreased while FWHM increased. There was

    generally good agreement to within 3% between the acquired dose profiles obtained by the DMG and the

    film except at dose profile tails, where film over-responded by up to 30% due to its intrinsic depth dose

    dependence at low doses.

Publication Date


  • 2013

Citation


  • Lian, C. P. L., Wong, J. Hsiu Ding., Young, A., Cutajar, D., Petasecca, M., Lerch, M. L. F. & Rosenfeld, A. B. (2013). Measurement of multi-slice computed tomography dose profile with the Dose Magnifying Glass and the MOSkin radiation dosimeter. Radiation Measurements, 55 51-55.

Scopus Eid


  • 2-s2.0-84880921693

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2221&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1212

Number Of Pages


  • 4

Start Page


  • 51

End Page


  • 55

Volume


  • 55