UNIT 6 Chapter 8 X-Ray Emission & 9

Question 1

the number of x-rays in the beam

Answer 1

X-ray quantity

Question 2

the penetrability of the beam

Answer 2

X-ray quality

Question 3

the intensity of the xray beam, the number of xrays in the beam

Answer 3

xray quanitity

Question 4

another term used for intensity

Answer 4

radiation exposure

mAs=#=intensity=radiation exposure

Question 5

radiation exposure, intensity or quality is measured in ___ in the air

Answer 5

milligray (mGya)

Question 6

measures the number of ion pairs produced in the air

Answer 6

milligray in the air

Question 7

factors that affect radiation exposure

Answer 7

mAs, kVp, distance, filtration

Question 8

xray quantity is _________ to mAs

Answer 8

proportional

Question 9

the main controlling factor is

Answer 9

mAs

Question 10

when mAs is doubled, the quantity of xrays is____

Answer 10

doubled

Question 11

Grays in air ar the measurement for x-ray_____

Answer 11

quantity, exposure or intensity

Question 12

the number of xrays in the useful beam defines xray ______

Answer 12

quanitity

Question 13

if filter thickness is ___ then xray intensity is___

Answer 13

If filter thickness is INCREASED, then xray intensity is DECREASED and if filter thickness is DECREASED then xray intensity is INCREASED

Question 14

the inverse square law has the same affect on optical density and x-ray

Answer 14

The inverse square law has the same affect on x-ray intensity x-ray exposure x-ray quantity and optical density.

Question 15

An increase of 15% in kVp is equivalent to increaseing mAs

Answer 15

An increase of 15% in K V P is equivalent to increase seen M A S 100%.

Question 16

If the intensity of a 70kVp exposure at 20 mAs is 10 mGya what would it be at 5 mAs?

Answer 16

it would be 25 mGya at 5 mAs because exposure is proportional to mAs

Question 17

If an exposure is 0.5 mGya at an SID of 40 inches, what would the exposure be at an SID of 60 inches?

Answer 17

it would be at 0.222 mGya at an SID of 60 inches because of the inverse square law.

Question 18

The penetrability of an x-ray beam is called x-ray _____.

Answer 18

The penetrability of an x-ray beam is called x-ray quality.

Question 19

An x-ray beam that could pass through dense tissue would have high _____.

Answer 19

An x-ray that could pass through thick tissue would have high quality and penetrability.

Question 20

A compensating filter is used to create _____ optical density with a body part of _____ thickness.

Answer 20

A compensating filter is used to create uniform optical density with a body part of non-uniform thickness.

Question 21

Five X-Ray Interactions with Matter

Answer 21

Coherent scattering 
Compton scattering 
Photoelectric effect 
Pair production 
Photodisintegration

Question 22

Coherent Scattering can occur at energies below

Answer 22

10 KeV

Question 23

AKA classical scattering or Thompson

scattering

Answer 23

Coherent Scattering