A. patient exposures

Question 1

________: Exposure factor in the diagnostic range that mainly controls beam quality or beam penetrability (beam energy)

Answer 1

Kilovolt peak (kVp)

Question 2

KVP controls

Answer 2

radiographic contrast

Question 3

As kVp is____, less x-rays are absorbed by the patient and less dose to the patient

Answer 3

increased

Question 4

Higher kVp can increase ______, which contributes to patient dose

Answer 4

Compton scatter

Question 5

_________ rule: Increasing the kVp by 15% is equal to doubling mAs This allows for the reduction of mAs and patient dose

Answer 5

Fifteen percent rule

Question 6

Fifteen percent rule will affect the

Answer 6

contrast and the radiographic image

Question 7

________= Exposure factor in diagnostic range that determines beam quantity

Answer 7

Milliampere seconds (mAs)

Question 8

mAs combines

Answer 8

mA with seconds (exposure time)

Question 9

As mA is increased, the quantity of x-rays produced is

Answer 9

increased proportionately

Question 10

mAs controls patient dose more than

Answer 10

kVp

Question 11

____is used to reduce the radiation exposure to the patient or radiation worker

Answer 11

Shielding

Question 12

Shields are placed between the radiation source and the exposed person in forms of

Answer 12

protective apparel for diagnostic ranges

Question 13

Protective apparel can be worn by the radiation worker or by the patient to protect sensitive body parts that will not be included in the

Answer 13

diagnostic image

Question 14

Radiation workers wear lead aprons when performing ____

Answer 14

fluoroscopic exams

Question 15

Protective aprons are made of

Answer 15

0.5 mm of lead

Question 16

Patients can wear gonadal and thyroid shields when this does not affect the

Answer 16

quality of the image

Question 17

protective aprons Reduces occupational exposure to

Answer 17

10%

Question 18

____= the thickness of an absorber material that will reduce the beam to half of its original value

Answer 18

half-value layer (HVL)

Question 19

____= the thickness of an absorber material that will reduce the beam to one-tenth of its original value

Answer 19

Tenth-value layer (TVL)

Question 20

1 TVL= ____HVL

Answer 20

3.3

Question 21

______will affect the radiation field size, which affects the exposed area

Answer 21

collimation

Question 22

A ____field size will increase the exposed area and increase dose

Answer 22

larger

Question 23

Collimation affects

Answer 23

scatter

Question 24

As field size increases, scatter increases, and patient dose ___

Answer 24

increases

Question 25

To reduce patient dose from scatter, collimate field sizes during imaging procedures. This includes

Answer 25

MV portal and KV imaging on treatment machines

Question 26

Patient or part thickness will affect

Answer 26

scatter and patient dose

Question 27

Thicker body parts will cause more

Answer 27

scatter

Question 28

Thicker parts require an increase in technical factors to produce a

Answer 28

quality image

Question 29

An increase in ____factors will increase patient dose

Answer 29

technical

Question 30

The _____ included in the image will also determine the amount of scatter

Answer 30

type of tissue

Question 31

Attenuation of the beam is determined by

Answer 31

muscle, bone, fat, air, etc.

Question 32

Proper _____is necessary for patient compliance, which may reduce the number of repeat images needed

Answer 32

communication

Question 33

Repeating images ___patient dose

Answer 33

increases

Question 34

In certain instances, exposure time may need to be reduced to reduce patient motion . To compensate for the shorter exposure time,

Answer 34

mA may need to be increased, which Will increase patient dose