Correct Answer:- Option-B
Question58:-Which of the following isotope is not used for permanent implant in brachytherapy 7
A:-Gold 198
B:-lodine 125
C:-Palladium 103
D:-Cesium 137
Correct Answer:- Option-D
Question59:-Cobalt 60 radioactive isotope has a half life of
‏74نم‎ 5
B:-1620 years
C:-30 years
D:-5.6 years
Correct Answer:- Option-D
Question60:-Which of the following is a beam modifying device used in Radiotherapy 7
A:-Phantom
B:-Wedges
C:-Breast Board
D:-Thermoplastic masks
Correct Answer:- Option-B
Question61:-Which of the following radiation detectors cannot be used in automatic exposure control (Photo timers}) in an
x-ray generator system 7
A:-Thermoluminesent detector
B:-Photo multiplier detector
C:-lonization detector
D:-Solid state detector
Correct Answer:- Option-A
Question62:-CT number for air is
ಹಿಂ
B:--1000
C:-1000
0-1
Correct Answer:- Option-B
Question63:-The degree of blackening of Radiographic of film is described by
A:-Optical density

D:-Gamma
Correct Answer:- Option-A
Question64:-True statement regarding plain abdominal radiography is
A:-A short exposure time is unnecessary
B:-The lower border of cassette should be positioned at the level of pubis symphysis
C:-Injection of air via nasogastric tube helps in diagnosis of perforation
D:-All of the above
Correct Answer:- Option-C
Question65:-The Gadolinium-diethyltriamine penta acetic acid (Gd-DTPA} is a
A:-Contrast medium used in Magnetic Resonance Imaging
B:-Contrast media used for CT imaging
C:-Contrast media used in Fluoroscopy
D:-Emulsion used in x-ray films
Correct Answer:- Option-A
Question66:-Which of the following is not a Magnetic Resonance Imaging Parameter 7

B:-Electron Density
C:-T2 Relaxation Time
D:-T1 Relaxation Time
Correct Answer:- Option-B
Question67:-The inherent filtration in an x-ray tube ranges from
A:-0.5to 1 mm Al
B:-.001 t0 .01 mm lead