B:-Esthesioneuroblastoma
C:-Small cell lung carcinoma
D:-All of the above
Correct Answer:- Option-C
Question49:-Cranial nerve least affected in carcinoma nasopharynx ‏گا‎
‎Al
‎8:41
‏ر2‎
‎0:۷۱
‎Correct Answer:- Option-A
Question50:-Mechanism of chemotherapy induced radiation sensitivity of taxanes
A:-Cellular arrest in G2M phase of the cell cycle
B:-Induction of apoptosis
C:-Reoxygenation of tumor cells
D:-All of the above
Correct Answer:- Option-D
Question51:-Which of the following normal tissue constraints is wrong 7
A:-Optic nerve - Maximum < 55 Gy
B:-Optic chiasm - Maximum < 55 Gy
C:-Brain stem - Maximum < 45 Gy
D:-Spinal cord - Maximum < 45 Gy
Correct Answer:- Option-C
Question52:-Cervicallymphadenopathy is present in ப % of patients with carcinoma nasopharynx.
A:-57
B:-67
೧77
D:-87
Correct Answer:- Option-D
Question53:-Halflife of iodine -131 is
A:-24 Hours
B:-8 Days
C:-72 Hours
D:-5.26 Years
Correct Answer:- Option-B
Question54:-Which of the following is correct 7
A:-LDR range of 1-2 Gy/hour
B:-MDR range of 2-12 Gy/minute
C:-HDR over 12000 cGy/hour
D:-None of the above
Correct Answer:- Option-D
Question55:-Median lethal dose of whole body radiation expressed as a single fraction is approximately
‏4-:ھ‎ Gy
B:-8 Gy
C:-15 Gy
D:-20 Gy
Correct Answer:- Option-A
Question56:-Which of the following regarding "hot spot" is correct (ICRU report 62) 7
A:-Volume outside PTV that receives dose>100% of specified PTV dose at least *2em”~ (3}’ in a section
B:-High dose to RVR (Remaining Volume at Risk}
C:-Volume outside PTV that receives dose>100% of specified PTV dose, 15mm diameter
D:-Area outside target that receives dose>100% of specified target dose, at least “2cm~(3)" in a section
Correct Answer:- Option-C
Question57:-PDD (Percentage Death Dose) of gamma rays of Cobalt 60 at 10 cm depth is (SSD-80 cm)
A:-45%
B:-55%
C:-65%
D:-75%
Correct Answer:- Option-B