Some types of cancer can be effectively treated by bombarding the cancer cells w

Question

Some types of cancer can be effectively treated by bombarding the cancer cells with high energy protons. Suppose1.16 x 10^17 protons, each with an energy of 950keV are incident on a tumor of mass 3.82 mg. If the quality factor/RBE for these protons is 3,
a) what is the dose in medical units?
b) what is the effective dose in medical units? Some types of cancer can be effectively treated by bombarding the cancer cells with high energy protons. Suppose1.16 x 10^17 protons, each with an energy of 950keV are incident on a tumor of mass 3.82 mg. If the quality factor/RBE for these protons is 3,
a) what is the dose in medical units?
b) what is the effective dose in medical units?
a) what is the dose in medical units?
b) what is the effective dose in medical units?

Explanation / Answer

Total energy = 1.16 × 1017 × 950 × 103 × 1.6 × 10-19 J

Mass = 3.82 × 10-6 kg

Hence

BED = Quality Factor × Energy / Mass =  1.4 × 1010 J/kg = 1.4 × 1010 Sv

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