METHODS
Solid Water phantom-containing prostheses (cobalt-chromium-
molybdenum and cobalt-chromium-molybdenum-titanium)
were placed between the phantoms used for the measurements.
Films at 10, 20 and 30 cm depths were irradiated for 6
and 18 MV with 50 cGy dose in the presence or not of prosthesis.
Dose profiles were evaluated statistically.
RESULTS
For 6 and 18 MV photon energies, significant differences was
found along the thick and vertical axes of both prostheses at
10 and 20 cm depths and along the middle, thick and vertical
axis at 30 cm depth (p<0.05).
CONCLUSION
Hip prostheses affect radiotherapy dose distribution, and this
should be considered when planning a treatment.
Keywords: Dose profiles; hip prosthesis; radiotherapy
