Abstract—EBT2 film has been widely used in the dosimetry
application of radiation therapy with lots of benefits especially
its self-development, water equivalent, energy independent and
high spatial resolution. However, the higher inhomogeneity
between the pixels of EBT2 image, needed to be averaged out
according to the traditional method, but it could sacrifice the
spatial resolution. The Wiener filter technique was introduced
in this paper. The EBT2 film was calibrated by using the PDD
method and the film calculate doses were compared with the
measurement doses by the edge detector with the water
phantom. The results demonstrate that the Wiener filter
technique has higher accuracy than the traditional method and
it would not sacrifice the high spatial resolution of EBT2 film.
This method can also be applied to all the quality assurances of
treatment planning of radiationtherapy by using EBT2 film.
Index Terms—Wiener filter, EBT2 film, radiation therapy
L. Chang is with the Department of Medical Imaging and Radiological
Sciences, I-Shou University, Kaohsiung, Taiwan (e-mail: cliyun@
isu.edu.tw).
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Cite:Liyun Chang, "Wiener Filter Used in the EBT2 Film for Radiation
Therapy," International Journal of Chemical Engineering and Applications vol. 4, no. 4 pp. 213-216, 2013.
