Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

RTT Science > Exam 4 > Flashcards

Exam 4 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Background radiation from natural environment includes all of the following: (3)

A
  • Terrestrial
  • Internal radioactive elements
  • Cosmic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Personnel are required to be monitored if expected to receive ________ of the effective dose equivalent.

A

> 10%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Collimation increasing the field size in turn affects the exposed area by:

A

Increasing dose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Avoiding exposure to radiation that does not have a direct benefit regardless of the dose is ________.

A

ALARA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Pilots have an increased exposure to radiation.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The basic protective measures in radiation safety are all of the following except:

A

dose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Collimation of a larger field size causes scatter to _____________.

A

increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Main source is Potassium-40 is a main source of internal radioactive elements. T/F

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How often must protective apparel be inspected for quality?

A

Annually

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The general rule for students in an radiologic education program is that the students must be 18 or older to enter the program due to exposure limits.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pregnancy may be declared verbally. T/F

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which anatomic site has the lowest percentage of active bone marrow in adults?

A

sternum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Kilovot Peak (kVp) is the exposure factor in diagnostic x-ray that controls ____________.

A

beam quality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Patient considerations regarding patient dose management include all of the following except:

A

tissue type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The annual occupational effective dose limit for the skin, hands and feet is ___________________.

A

500 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The Occupational Radiation Monitor for extremity monitoring must be worn at ____________________.

A

Fingers (ring)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

mAs is the exposure factor in diagnostic x-ray that determines ____________.

A

beam quantity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The Occupational Radiation Monitor for personnel whole body must be worn at ____________________.

A

collar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The annual public infrequent exposure limit is ___________________.

A

5 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The annual public exposure limit for lens of eye is ___________________.

A

15 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The total exposure limit for the embryo/fetus is ___________________.

A

5 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Shielding to reduce radiation exposure
include (3)

A

-protective barriers
-lead aprons
-thyroid shields

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The Occupational Radiation Monitor
for fetal monitoring must be worn at
____________________.

A

waist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

T or F: mAs controls dose more than
kVp

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

The annual occupational effective dose limit for the lens of the eye is
_______

A

150 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The monthly effective dose for the embryo/fetus is ___________________.

A

0.5 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The annual public continuous exposure limit is ___________________.

A

1 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

T or F: Occupational Monitoring
Reports should follow you for your
entire career

A

True

29
Q

Which anatomic site has the highest
percentage of active bone marrow in
adults?

A

lower limb girdle

30
Q

T or F: Terrestrial is a constant
exposure level(s) for everyone

A

False

31
Q

The annual public infrequent exposure
limit is _____

A

5 mSv

32
Q

T or F: 15% rule states that increasing
the mAs by 15%, is equal to doubling
kVp

A

False

33
Q

Patient considerations regarding
patient dose management include all
of the following except:

A

contrast agents

34
Q

The annual occupational effective
dose limit is ________

A

50 mSv

35
Q

The cummulative occupational
effective dose limit is ___________________.

A

10 mSv x age

36
Q

Entrance skin exposure (ESE) def.

A

exposure to the entrance surface (aka. patient radiation dose)

37
Q

Mean marrow dose (MMD)

A

average radiation dose to the entire active bone marrow

38
Q

Genetically significant dose (GSD)

A

gondal dose significant for possible genetic response

39
Q

Tissue dose

A

various tissues & organs have varying sensitivity

40
Q

Effective dose

A

patient radiation dose metric that is used to estimate stochastic radiation response in populations

41
Q

The thickness of an absorber material
that will reduce the beam to 50% of its
original value is known as:

A

HVL

42
Q

How often is the Optical Distance Indicator @ isocenter checked?

A

daily

43
Q

laser alignment tolerance is _______ for
non-IMRT

A

2 mm

44
Q

Winston-Lutz test verifies laser
accuracy when using __________ .

A

SRS

45
Q

How often is the collimator setting
checked?

A

daily

46
Q

Hounsfield Units (or CT #’s) are checked daily & monthly with a
tolerance of ___________.

A

+/- 5 HU

47
Q

T or F: Emergency off buttons are checked annually by physicist.

A

False

48
Q

Which of the following is not checked during daily QA on the linear accelerator?

A

Emergency Off Buttons

49
Q

Dose output can be verified by using
___________________

A

ion chamber

50
Q

The monthly and annual dose output tolerance is +./ ________%.

A

2%

51
Q

Light & Radiation Field Coincidence
Tests has a tolerance of _____ mm/side
for asymmetric fields.

A

1mm

52
Q

The typical air pressure should read ________ psi

A

47 psi

53
Q

Light & Radiation Field Coincidence Tests has a tolerance of _______ mm/side for symmetric fields

A

2 mm

54
Q

CT tube warm-up is performed if idle for a minimum of ___ hours.

A

2

55
Q

The collimator setting test should be measured at ___________ TSD

A

100

56
Q

What is the tolerance for the collimator settings?

A

2 mm

57
Q

Imaging: full range of travel, imaging
dose, & kV beam quality/energy are
checked __________.

A

annually

58
Q

Laser alignment tolerance is ______ for
Stereotactic

A

1 mm

59
Q

Imaging and Treatment Coordinat Coincidence test for MV, kV, & CBCT is performed _________ with a tolerance for non-stereo of _________.

A

daily; 2 mm

60
Q

When a therapist or CT tech performs the CT daily qa, all of the following tests are performed.

A

-water phantom test
-laser alignment checked
-safety lights checked

61
Q

Imaging: scaling, spatial resolution, contrast, uniformity, noise, & HU constancy should be tested:

A

monthly

62
Q

Dose output is verified _________ with a tolerance of +/- 3% for electrons & photons

A

daily

63
Q

What is the tolerance of MLC transmission?

A

2%

64
Q

What is the tolerance for the Optical Distance Indicator @ isocenter?

A

2 mm

65
Q

What is the Picket Fence test used to check?

A

MLC leaf positions

66
Q

A safe gas (sulfur hexafluoride)
pressure is _______ psi

A

29

67
Q

Waveguide temperature is normally _________ degrees Celsius (+/- 5 degrees)

A

40

68
Q

What test(s) is needed after replacing the light bulb in the linear accelerator?

A

Light & Radiation Field Coincidence Tests

RTT Science (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions