Dose Test

Question 1

We practice ALARA because of the linear, non-threshold dose-response relationship of stochastic effects of radiation exposure (T/F)

Answer 1

True

Question 2

The cardinal principles of radiation protection are

Answer 2

Time

Distance

Shielding

Question 3

When dealing with the distance part of the cardinal principles of radiation protection, we apply the ______to account for the changes in distance

Answer 3

Inverse square law

Question 4

During fluoroscopy, the technologist should remain as close to the patient as possible (T/F)

Answer 4

False

Question 5

One TVL is the thickness of absorbing material required to reduce radiation intensity to _____ its original value

Answer 5

1/10

Question 6

Lead protective aprons usually contain _____ mm lead equivalent

Answer 6

0.5

Question 7

Effective dose is the equivalent whole body dose (T/F)

Answer 7

True

Question 8

Most of the technologist’s dose comes from

Answer 8

Fluoroscopy and mobile radiography

Question 9

Leakage radiation must be kept below

Answer 9

100 mR at 1 meters distance

Question 10

X-ray beam on must be positively and clearly indicated to the radiologic technologist (T/F)

Answer 10

True

Question 11

The SID indicator must be accurate to within ____ of the indicated SID

Answer 11

2%

Question 12

The X-ray beam and light beam must coincide to within _____ of the SID

Answer 12

2%

Question 13

The positive beam limitation (PBL) device must be accurate to within ______ of the SID

Answer 13

2%

Question 14

Total filtration must be at least

Answer 14

2.5mm Al equivalent

Question 15

For any given technique, the output intensity should be constant from one exposure to another

Answer 15

Reproducibility

Question 16

When adjacent mA stations are used, and exposure time is adjusted for constant mAs, the output intensity should be constant defines

Answer 16

Linearity

Question 17

In stationary radiography, the exposure switch should be fixed to the operating console and not to a long cord (T/F)

Answer 17

True

Question 18

The exposure switch for mobile radiography should be on a cord that is at least

Answer 18

2m long

Question 19

The source-to-skin distance on stationary fluoroscopes must not be less than _____ and not less than ______ on mobile fluoroscopes

Answer 19

15” and 12”

Question 20

The fluoroscopic image receptor serves as a primary radiation barrier (T/F)

Answer 20

True

Question 21

The fluoroscopic exposure switch must be of the

Answer 21

Dead-man type

Question 22

Primary radiation is the useful beam (T/F)

Answer 22

True

Question 23

The intensity of scatter radiation 1 m from the patient is approximately _____ of the intensity of the primary beam at the patient

Answer 23

0.1%

Question 24

Protective barriers designed to shield areas from secondary radiation (leakage and scatter) are called

Answer 24

Secondary barriers

Question 25

The control booth barriers is a primary barrier (T/F)

Answer 25

False

Question 26

A wall along which an X-ray imaging system is mounted probably requires more shielding than the other walls of the room (T/F)

Answer 26

True

Question 27

An area that is primarily occupied by radiography personnel and patients is called

Answer 27

Controlled area

Question 28

Design limits for a controlled area are based on the annual occupational dose limit of

Answer 28

5 REM/yr

Question 29

The percentage of time during which the x-ray beam is on and pointed toward a particular protective barrier is called

Answer 29

Use factor

Question 30

The type of crystal used in a thermolminescent dosimeter is

Answer 30

Lithium fluoride

Question 31

Optically stimulated luminescence dosimetry uses _____ as the radiation detector

Answer 31

Aluminum oxide

Question 32

Entrance skin dose (ESD) is usually referred to as the patient dose (T/F)

Answer 32

True

Question 33

The upper limb girdle contains most of the active bone marrow is adult humans (T/F)

Answer 33

False

Question 34

For computational purposes, the genetically significant dose considers

Answer 34

Age

Sex

Number of children produced by those examined

Question 35

CT is considered a high dose procedure (T/F)

Answer 35

True

Question 36

Studies have shown that most repeat examinations are caused by positioning errors or poor radiographic technique (T/F)

Answer 36

True

Question 37

When radiographing the upper extremities (especially when the patient is seated), special care should be taken to ensure that the primary beam dose not intercept

Answer 37

The gonads

Question 38

The types of specific area shielding include

Answer 38

Contact shields

Shadow shields

Question 39

The period of highest radiosensitivity for the unborn child is

Answer 39

The first trimester

Question 40

Methods for avoiding irradiating pregnant patients include

Answer 40

Elective booking

Patient questionnaires

Waiting room posting

Question 41

We meet our obligation to the pregnant patient by posting signs in the waiting room informing them to tell the radiographer if they are pregnant (T/F)

Answer 41

True

Question 42

The annual NCRP recommended dose limit for the lens of the eye is

Answer 42

15 rem

Question 43

The annual NCRP recommended dose limit for the thyroid, skin, hands and feet is

Answer 43

50 rem

Question 44

The annual NCRP recommended dose limit for the general public is

Answer 44

100 mrem

Question 45

The total recommended dose limit for a fetus is

Answer 45

500 mrem

Question 46

the equivalent 1 month dose limit for the fetus is

Answer 46

50 mrem

Question 47

Effective dose=

Answer 47

Radiation weighting factor X Tissue weighting factor X absorbed dose

Question 48

Radiologic technology students who are under 18 years old have a dose limit of

Answer 48

100 mrem/yr

Question 49

It doesn’t matter which side of the film badge is worn toward the front of the wearer (T/F)

Answer 49

False