Ch11-12

Question 1

A diagnostic type tube housing protects the patient from

Answer 1

Off focus and leakage radiation

Question 2

The radiographic table should be uniform thickness and radiolucent; most are made of

Answer 2

Carbon fiber

Question 3

The patients skin surface should be ___cm away from the collimator.

Answer 3

15cm

Question 4

PBL dimensions require not to exceed __%

Answer 4

2%

Question 5

Total filtration is what 2 factors together?

Answer 5

Added and inherent

Question 6

X-ray equipment operating over 70kvp should have a filtration of aluminum thickness to

Answer 6

2.5mm aluminum

Question 7

Compensating filters are used such as:

Answer 7

The trough =chest

He wedge=femur , foot

Question 8

Exposure linearity and Kvp setting should be within the___%

Answer 8

10% range of selected kvp

Question 9

The use of a grid increases patient dose but improves

Answer 9

Contrast and visible detail

Question 10

For mobile radiography, the SSD should be no less than

Answer 10

12 inches

Question 11

Sheets of aluminum

Answer 11

Added filtration

Question 12

The brightness

Answer 12

Luminance

Question 13

The distance from anode focal spot to IR

Answer 13

SID

Question 14

The glass envelope encasing the tube, the insulating oil, and the glass window of the tube housing

Answer 14

Inherent filtration

Question 15

A term used for candelas per square meter

Answer 15

Nit

Question 16

The photoconductor used to convert X-rays to electrical signals

Answer 16

Amorphous selenium

Question 17

When is the use of a grid required??

Answer 17

Anything over 70kvp

10cm thickness

Question 18

To reduce patient dose in flouro, the distance to the image intensifier should be

Answer 18

As short as possible

Question 19

The sharper the image, the ______ the pixels

Answer 19

Smaller

Question 20

Height/distance =

For lead lines on a grid

Answer 20

Grid ratio

Question 21

Is generally located outside the glass window of X-ray tube housing above collimator shutters

Answer 21

Added filtration

Question 22

Placing the 1st pair of shutters in the collimator as close to the X-ray tube window will

Answer 22

Reduce patient dose from off focus radiation

Question 23

Th genetically significant dose (GSD) for US is

Answer 23

.20mSv

Question 24

Air gap can be used in alternative to a

Answer 24

Grid

Question 25

Correctly placed gonadal shilding will protect women by _____ and men by _____

Answer 25

50% | 90-95%

Question 26

To accomadate involuntary motion; a shorter exposure time and increased____ May be used

Answer 26

mA

Question 27

A _______ _________ program should ensure that standardization in postprocessing of digital images is done.

Answer 27

Quality control

Question 28

The goal of image gently is to make awareness of

Answer 28

Lower radiation doses for pediatric patients

Question 29

A blotchy image causes by insuffient quantity of X-ray photons is called

Answer 29

Quantum noise/mottle

Question 30

The use of air gap can compensate there what type of grid ?

Answer 30

8:1 grid

Question 31

The dosimeter That measures the skin directly

Answer 31

TLD | Which uses LiF crystals

Question 32

_____ _____ shields are not recommended for PA projections bcuz of anterior and lateral surfaces are not covered

Answer 32

Shaped contact

Question 33

Bone marrow dose may also be referred to as

Answer 33

Mean marrow dose

Question 34

For safety of female organs, the shield should be approximately _____ medial to palpable ASIS

Answer 34

1inch

Question 35

4 types of shields

Answer 35

Flat, shaped, shadow, clear

Question 36

3 ways to specify radiation received by a patient

Answer 36

ESE, bone marrow, gonadal dose

Question 37

What can facilities and radiographers do with image gently ??

Answer 37

They can “Pledge” to follow them in their dept.

Question 38

What type of shield is used for the lens of the eye??

Answer 38

A contact shield

Question 39

What percent of lead of weight should a clear shield have??

Answer 39

30%

Question 40

The female reproductive organs receive _____ times more then men during radiographic procedures

Answer 40

3x

Question 41

Filtration increases the ________ of the X-ray bean.

Answer 41

Quality !! | As it removes low energy X-rays

Question 42

Aluminum has the atomic # of

Answer 42

Z=13

Question 43

The numeric values of a digital image are aligned in rows an d columns called

Answer 43

An array

Question 44

A scintillator = | A photoconductor=

Answer 44

Amorphous silicon Amorphous selenium

Question 45

Common image matrix are

Answer 45

1024x1024

Question 46

CR uses ________ in its image receptor using Eu as th activator.

Answer 46

Photostimulable phosphor

Question 47

The most effective protective shield are the

Answer 47

Flat contact shields | 1mm lead thickness

Question 48

The mean marrow dose is 25% of what the ____________ dose is bcuz the radiation is spread all over the body it is not accurately calculated.

Answer 48

Bone marrow dose

Question 49

To follow ASRT and ARRT code of ethics, the —

Answer 49

FGP(flourospocally guided positioning) | *Used to locate CR

Question 50

Damage is unlikely to occur to newborn babies if the exposure is under

Answer 50

0.2Gy