B. Sc Radiotherapy Technology 2nd Year
(BF/2017/09)
Physics of Radiotherapy-II

M.M.: 80 Time: 3 Hours
Note: 1.) Attempt all questions.
2.) ATTEMPT BOTH PARTS IN SINGLE ANSWER BOOK ONLY.
3.) NO SUPPLEMENTARY SHEET SHALL BE ALLOWED/ PROVIDED
4.) The Student must write Q.P. Code in the space provided on the Title page of the Answer Book.

Section-A

1. Write about the following. (All the five questions are compulsory)
[5x5=25]
a. Equivalent dose.
b. Tissue Air Ratio
c. Collimator scatter factor
d. Shielding blocks
e. Collisional losses

2. Attempt any one. Both questions carry equal marks.

a. Describe the transfer of absorbed dose from one medium to another for photons and electrons. [15]

OR

b. Describe about the various type of phantoms. [15]

Section
3. Write about the following. (All the five questions are compulsory)

a. Roentgen
b. Depth dose distribution
c. Tissue Maximum Ratio
d. Beam quality
e. MLC

4. Attempt any one. Both questions carry equal marks.

a. Describe about the wedge filters. [15]
OR
b. Describe the field flatness and symmetry of clinical electron beams.