CLOSED DOOR 2

Question 1

There are no circumstances under which a technologist should be given an invulontary leave of absence due to pregnancy.

Answer 1

True

Question 2

Patient dose is usually estimated by conducting simulated x-ray examination with?

Answer 2

Human phantoms and test objects

Question 3

The frequency of x-ray examination being performed is increasing in all age groups.

Answer 3

True

Question 4

Patient from diagnostic x-ray is most often report in?

Answer 4

Entrance skin exposure

Question 5

Patient skin exposure can be measured indirectly by using a?

Answer 5

Nomogram

Question 6

If the radiographic technique for a KUB calls for 40 mAs, what is the ESE when the output 75 mR/mAs (075 mGy or 75 uGy/mAs)?

Answer 6

300 mR

Question 7

Acute skin effects from radiation exposure have been reported following

Answer 7

angiointerventional

Question 8

For the average fluoroscopy exam the ESE is

Answer 8

4 R/min

Question 9

An estimation of patient dose is reported as

Answer 9

Entrance skin exposure
Bone marrow dose
Gonadal dose

Question 10

Bone marrow dose is measured

Answer 10

as an estimate from ESE

Question 11

The most important variables in determining x-ray dose are the _ and the _

Answer 11

receptor speed
x-ray production efficiency

Question 12

The simplest way to measure patient dose is to measure the

Answer 12

entrance skin exposure

Question 13

The radiation dose monitor most frequently used to measure patient exposure is the

Answer 13

thermoluminescent dosimeter

Question 14

If the output intensity of an x-ray machine is 6.4 mR/mAs at 80 kVp, what is the patient’s ESE from an exam done at 20 mAs at 80 kVp?

Answer 14

128 mR

Question 15

The approximate average of bone marrow dose to the population of the United States is:

Answer 15

100 mR/yr

Question 16

The genetically significant dose to the general public is important because of the risk of:

Answer 16

effects of the gene pool

Question 17

What is the only acceptable techniques for mammography:

Answer 17

I. Screen/film
II. Digital

Question 18

Glandular dose from mammography is approximately ______ of the ESE.

Answer 18

15%

Question 19

Digital mammography results in lower dosage than screen/film mammography.

Answer 19

True

Question 20

CT is considered a low-dose procedure.

Answer 20

False

Question 21

The period of major organogenesis is during ______________ of pregnancy.

Answer 21

2nd to 10th week

Question 22

Performing routine xray exams without indication is acceptable for?

Answer 22

NOTA

Question 23

Which of the following is one of the least repeat rates?

Answer 23

chest xray

Question 24

Patient dose can be reduce by using?

Answer 24

fast screen
high kVp

Question 25

Breast dose from scoliosis exam can be reduced by using the?

Answer 25

PA proj.
lead shielding

Question 26

The dose in CT is lower if a multi slicer is higher

Answer 26

True

Question 27

Xray console must shown

Answer 27

beam on time

Question 28

Collimator accurately aligned within a ____ % of the SID?

Answer 28

2

Question 29

The ___ is the primary barrier for fluoroscopy

Answer 29

image intensifier

Question 30

The design of an uncontrolled area in radiology is base on the NCRP recommended limit of mRem/yr for the public

Answer 30

100

Question 31

Gas-filled radiation detectors are based on the

Answer 31

ionization of gas

Question 32

The Is used for precise calibration of the out put intensity of diagnostic x-ray tube

Answer 32

ion chamber

Question 33

A geiger-muller counter is a

Answer 33

Gas filled detector

Question 34

The advantage of using thermoluminescent dosimeters is/are

Answer 34

small size
tissue equivalent response

Question 35

Radiation protection guidelines are based on

Answer 35

late effects of radiation

Question 36

is a late effect of radiation

Answer 36

cancer

Question 37

A epidemiological study of the late effects of very low doses of radiation requires a population of People

Answer 37

millions

Question 38

A(n) _______ effect increases in incidence but not severity as the dose increases.

Answer 38

Stochastic

Question 39

Low doses of radiation have been shown to cause _______.

Answer 39

Chromosome damage

Question 40

Chronic low doses of radiation shows _________ effect to fertility.

Answer 40

No

Question 41

Studies of A bomb survivors indicate that leukemia has ____________ dose-response relationship to radiation.

Answer 41

Linear, non-threshold

Question 42

Radiation Induced- leukemia has a latent period of ______ years.

Answer 42

4-7

Question 43

Ankylosing spondylitis patients treated with radiation showed an increased incidence of ______________.

Answer 43

Leukemia

Question 44

It is difficult to link cancer because it occurs ______________ in the population.

Answer 44

In high proportion

Question 45

People who had radiation treatments to their thymus gland as children later showed excess risk of _________________.

Answer 45

Thyroid cancer

Question 46

People who were employed in painting radium watch dials showed an excess risk for _____ cancer.

Answer 46

Bone

Question 47

Relative risk

Answer 47

Observed cases/expected cases

Question 48

Radiation induced skin cancer in radiotherapy patients occured in

Answer 48

Threshold dose response

Question 49

A study of irradiated population which showed a relative risk factor below 1.0 would indicate that the population has ____ risk.

Answer 49

Reduced

Question 50

Data showing the radiation induced human genetic abnormalities ____

Answer 50

Does not exist