study this second questions

Question 1

source of electrons

Answer 1

negative cathode

Question 2

low voltage energy source goes to

Answer 2

filament

Question 3

phosphor plates size

Answer 3

0, 1, 2, 4

Question 4

what is correct for film

Answer 4

larger focal length (want small focus length for digital)
constant potential CD

Question 5

acute radiation syndrome is

Answer 5

ionization

Question 6

why is tungsten good

Answer 6

it has low cost, thermionic radiation, heat conductivity

Question 7

laser beam and light scintillation

Answer 7

PSPP

Question 8

what does film badge do

Answer 8

xray exposure of the operator

Question 9

dental staff max dose

Answer 9

50mSv 5 rem

Question 10

2012 recall patient with no disease but high caries risk

Answer 10

bitewing radiograph and selective PA

Question 11

most susceptible
nerve
muscle
bone
hematopoetic

Answer 11

hematopoetic

Question 12

aluminum filter for 70KeV

Answer 12

1.5mm

Question 13

filtration removes

Answer 13

low keV

Question 14

when do we treat pregnant patient

Answer 14

emergency pain

Question 15

what leads to image distortion the most

Answer 15

horizontal angulation

Question 16

skin from therapeutic radiation

Answer 16

direct (think erythema)

Question 17

caries

Answer 17

indirect radiation

Question 18

relative biological harm

Answer 18

equivalent dose
compare biological effects of different types of radiation

Question 19

energy absorbed by tissue

Answer 19

absorpted

Question 20

Calculate risks of radiation to human tissues on common scale
Used to assess risk of non-uniform radiation to localized part of body and degree to which this would increase a person’s “whole body” risk

Answer 20

effective dose

Question 21

measurement of energy for threshold ion pairs

Answer 21

exposure

Question 22

cotton roll placement

Answer 22

between biteblock and opposing teeth
(NOT between bitebock and imaging teeth)

Question 23

what acute is most lethal

Answer 23

CNS/CVS

Question 24

factors enhancing effects of xradiation
a. increased oxygen tension
b. decrease dose
c. older patient
d. decreased mitotic rate
e. specialized cells/mature cells

Answer 24

a

Question 25

effect of radiation in the oral cavity
a. loss of taste
b. excess saliva
c. excess fluid

Answer 25

a and xerostomia

Question 26

osteoradionecrosis question about damage

Answer 26

disruption in the vasculature of osseous structures

Question 27

coronal damage is due to

Answer 27

indirect effects

Question 28

largest source of man made

Answer 28

xrays