Abstract

Monte Carlo calculation of dose distribution in soft tissue phantom and determination of dosimetry parameters,
due to a high dose rate 169Yb source have been presented in this work. Dose deposition in high gradient region,
near the source, can only calculated accurately by Monte Carlo method. The results for this material of phantom
can be used in treatment planning systems. The calculated dosimetry parameters for the source are in agreement
well with the Monte Carlo and experimental results of others published literatures. We have used MCNP4C code
for the calculation.

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