41,

42,

43.

45.

47,

Regarding Xeroradiography, which of the following is not true ?

(ക) photoconductor used in amorphous selenium

(8) selenium is deposited as a thin layer onto a sheet of aluminium

(9) nointerface layer is present between selenium and aluminium

(12) selenium is deposited by condensation of vaporised liquid in high vacuum on the aluminium
sheet

Regarding Xeroradiography, which of the following is not true ?

(4) selenium layer is 150 - 400 microns

(8) protective overcoating of xeroradiographic plate is gelatin

(€) scoroton/cirotron are the charging devices for xeroradiographic plates

(0) sensitivity of the plates to X-rays depends an selenium thickness and on the energy (kVp)
of X-ray beam

Regarding the advantages of Xeroradiographic mammogram from film-screen mammogram, which
of the following is not true 7

(ക) high patient absorbed dose (8) விஜ enhancement

(0) broad exposure latitude (D) ன்னை

Regarding Circular tomography, which of the following is not true ?

(A} equipment is cheap (8) produces uniform section thickness
{C) exposure time is short (12) parasite streaks are not present

Regarding Pan tomography, which of the following is not true ?
(ಗಿ) produces a panoramic roentgenogram of curved surface
(8) X-ray tube rotates, but film holder remains stationary

(C) patient remains stationary throughout the examination
(12) നട! cormonly used as orthopantomography

Regarding Photographic density, which of the following is not true ?
(A) measurement of film blackness is called Photographic density
(8) total fog density of fresh X-ray film will average about 0.075

(त) total density exhibited by the radiograph is the sum of the density of 2 emulsions in double
coated films

(5) density is expressed in numbers

Regarding radiation protection, which of the following is not true ?

(^) Instochastic effect of radiation exposure, the probability of occurance of side effects increases
with increase in absorbed dose

(8) annual effective dose equivalent limit for occupational exposure is 30 ‏ہوک‎

(€) annual effective dose equivalent limit for lens of eye is 15 rems

)0( an individuals effective dose equivalent limit in rems should not exceed his/her age in
years

Regarding protective barriers, which of the following is not true 2

(ಗಿ) 1 4 wall holds a fixed film changer (like chest stand for chest radiography), use factor (U)
for that particular wall is One

(8) use factor (U) for the ceiling is always Zero
(C) use factor (U) for the secondary barriers is always Zero
(12) occupancy factor (T) for corridors is 1/4

153/2014 8 A