A middleaged woman underwent 12 screening mammograms Each ma

A middle-aged woman underwent 12 screening mammograms. Each mammogram study consists of 2 views for each breast and delivers 3.7 mGy to both breast.

a) What is the effective (whole body) dose in mSv that the patient received from each mammogram set? Hint: use the ICRP 103 tissue weighting factor for breasts.

b) What is her lifetime risk of radiation induced fatal cancer stemming from the 10 mammographic studies?

Note** I have found this question in here but that asmwere seemed wrong. I am looking for equations and calculations applied in order to get the right solution

Solution

mamogram dose per screeing = 3.7 mGy

weight factor for breast   = 0.12

equvivalent babosrbed dose = 3.7*0.12 = 0.444 mGy per screening

Total dose from 10 mamogram programs = 4.44 mGy

the risk of fatal cancer from amographic studies is 11 in 100000 per mamographic study recieving 3.7 mGy of dose.

This middle aged women recieved 10 times the dose

her risk of fatal cancer is 10 times

= 11*10 /100000 = 1.1 in 1000