Receptor Exposure - Radiation Protection

Question 1

what is receptor exposure?

Answer 1

the quantity of x-rays that reach the IR

Question 2

when mAs is doubled, what happens to receptor exposure?

Answer 2

receptor exposure is doubled

Question 3

when kVp is increased by 15%, what happens to receptor exposure?

Answer 3

receptor exposure is doubled

Question 4

if you increase grid ratio, what happens to receptor exposure?

why?

Answer 4

receptor exposure is decreased

grids absorb scatter

Question 5

if you increase body habitus, what happens to receptor exposure?

why?

Answer 5

receptor exposure is decreased

more attenuation & absorption

Question 6

if you increase beam restriction, what happens to receptor exposure?

why?

Answer 6

receptor exposure is decreased

reduction of scatter produced

Question 7

if you increase SID, what happens to receptor exposure?

why?

Answer 7

receptor exposure decreases

affected by the inverse square law

Question 8

if you increase kVp, what happen to receptor exposure?

why?

Answer 8

receptor exposure increases

more penetrating power

Question 9

if you increase mAs, what happens to receptor exposure?

why?

Answer 9

receptor exposure increases

more x-rays produced

Question 10

what is ALARA?

Answer 10

As Low As Reasonably Acheivable

Question 11

if you increase beam filtration, what happens to patient dose?

why?

Answer 11

patient dose decreases

removes long-wavelength rays

Question 12

total filtration must be at least ____ aluminum equivalent

Answer 12

2.5mm

Question 13

if you increase beam restriction, what happens to patient dose?

Answer 13

patient dose decreases

Question 14

if you increase body habitus, what happens to patient dose?

why?

Answer 14

patient dose increases

due to increasing mAs

Question 15

a recpetor with a high DQE will do what to patient dose?

Answer 15

lower patient dose

Question 16

if you increase screen speed, what happend to patient dose?

Answer 16

decreases

Question 17

if you increase grid ratio, what happens to patient dose?

why?

Answer 17

patient dose increases

grids remove scatter radiation to increase contrast, but an increase in mAs is needed

Question 18

if you increase kVp, what happens to patient dose?

why?

Answer 18

patient dose decreases

higher penetration power

Question 19

if you increase mAs, what happens to patient dose?

why?

Answer 19

patient dose increases

higher quantity of x-rays

Question 20

if you increase SID, what happens to patient dose?

Answer 20

patient dose decreases

Question 21

if you increase SID without adjusting mAs, what happens to patient dose?

Answer 21

patient dose decreases

Question 22

what are the 3 ways to lower a radiographers dose?

Answer 22

time
distance
shielding

Question 23

what are 6 ways to lower patient dose?

Answer 23

time(fluoro)
distance(OID)
shielding
collimation
increase kVp, decrease mAs
filtration