(4) Proton radiation therapy is used to bombard a tumor at a certain tissue dept
ID: 2076491 • Letter: #
Question
(4) Proton radiation therapy is used to bombard a tumor at a certain tissue depth with protons. We consider how protons slow down in body tissue. Let A deonte atomic mass of absorber, 2 the atomic number of incident particle Z the atomic number of absorber, I the material-dependent characteristic ionization constant, Tmaar the maximum kinetic energy transfer, S(Br) is density effect correction to ionization energy loss, and B and Y capture the relativistic effects of the incident particles. In the first table, we provide data on proton energy loss per pentration depth using the Bethe-Block formula for water. dE Z 1 Kz A B2 2 drExplanation / Answer
ANS:- Photon energy (MeV) Energy Loss(MeV)
3. 144.56 5.644
4. 195.51 4.567
5 296.48 3.558
6 396.98 3.035
7 497.26 2.747
8 597.45 2.559
9 697.58 2.428
10 797.67 2.339
11 897.74 2.258
12 997.79 2.206
13 1997.95 2.050
14 3997.91 2.011
So table is compleated.
as per liner interpoler method . value is not give in this Question.
but generally to interpolate the y2 value
x1, x3, y1 and y3 are to be need from table.
x2 defines as a point to interpolation perform.
y2 is interpolated solution & value
x1
y1
x2
y2
x3
y3
x1
y1
x2
y2
x3
y3
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