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Diagnostic Imaging > Exam 1: Take home test > Flashcards

Exam 1: Take home test Flashcards

1
Q

X-rays are what type of radiation?

A

Electromagnetic radiation

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2
Q

T/F: Lead aprons and gloves are designed to allow the shielded body part to be placed in the primary x-ray beam.

A

False

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3
Q

Lead aprons and gloves typically have ____ mm lead equivalent.

A

0.5 mm

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4
Q

What charge is the anode?

A

Positive

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5
Q

What type of charge do electrons have?

A

Negative

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6
Q

In the x-ray tube, electrons travel toward the ____?

A

Anode

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7
Q

In the x-ray tube, what % of the energy forms as x-rays?

A

1%

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8
Q

______ influences the penetrating power of the x-ray?

A

Kilovoltage

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9
Q

The discovery of the x-ray dates back to?

A

1895

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10
Q

Describe the purpose of the x-ray tube.

A

To prevent excess radiation, encloses the cathode & anode, place where x-rays are produced.

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11
Q

Name 3 out of 6 components that every safety program should include:

A
  • PPE
  • Technique chart
  • Dosimeter badge
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12
Q

T/F: It is acceptable to store lead aprons fold in a cabinet.

A

False

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13
Q

______ refers to the amount of electrical energy being applied to the filament. Determines the amount of electrons produced.

A

Milliamperage

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14
Q

T/F: The higher the kVp, the more penetrating power of the beam.

A

True

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15
Q

T/F: Grids help absorb scatter radiation.

A

True

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16
Q

Name the two types of safe lights?

A

Direct and indirect

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17
Q

How does the radiographic appearance of cortical and cancellous bones differ radiographically?

A

Cortisol is lighter on radiographs, cancellous tends to be darker because of more air.

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18
Q

Example of a long bone?

A

Femur

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19
Q

Example of a short/cuboidal bone?

A

Calcaneus

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20
Q

Example of a flat bone?

A

Skull

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21
Q

Example of irregular bone?

A

Hyoid bone

22
Q

Example of a sesamoid bone?

A

Patella

23
Q

In regards to the opaqueness of the following objects on a radiograph, rank them in order of MOST opaque to LEAST opaque.
(Bone, gas, fat, metal, soft tissue)

A
  1. Metal
  2. Bone
  3. Soft tissue
  4. Fat
  5. Gas
24
Q

If a grid is said to have a ratio of 8:1, what does this refer to?

A

The height of the lead strip compared to the width of the interspace.

25
Q

What is the name of the person credited with discovering the x-ray?

A

Wilhelm Conrad Roentgen

26
Q

The light bulb in the safe light should be _____ watts or less.

A

15 watts

27
Q

What is the distance from the target to the film called?

A

Focal film distance

28
Q

What influences the speed at which electrons travel from the cathode to the anode?

A

The kVp. The number of electrons produced in the electron is under the control of mAs by controlling the temperature of the cathode filament.

29
Q

The difference in density between two areas on a radiograph is referred to as?

A

Radiographic contrast

30
Q

When should a grid be used?

A

With large patients; 9, 10, or 11 cm thick

31
Q

How does a digital radiograph work compared to using traditional film?

A
  • Instead of having a cassette containing a film and screen, the image is received by an image receptor and is converted to an electrical latent image.
  • The image is then transferred to a computer.
  • Digital doesn’t have film, traditional does.
32
Q

_____ is described as the distance between two consecutive points.

A

Wavelength

33
Q

The wire filament in the cathode is made of what material?

A

Tungsten

34
Q

The area on the target within the anode that the electrons hit is known as _____.

A

Focal spot

35
Q

_____ is a term used in the evaluation of radiographs to describe the overall blackness/darkness of a film.

A

Radiographic density

36
Q

List 5 tips to minimize excess radiation exposure.

A
  • The PPE
  • Dosimeter badge
  • Technique charts
  • Collimate area to smallest size
  • Patient restriant
37
Q

If a grid is used, will this affect the setting of the radiograph machine?

A

Yes. Increased exposure is indicated the higher the grid ratio to account for amount of radiation.

38
Q

If you want to adjust the length of time that it takes for the x-rays to be produced, what control would you adjust?

A

mAs.

39
Q

What are the two types of digital radiography and how are they different?

A
  1. Direct- converts direct light.

2. Indirect- converts light to digital.

40
Q

_____ is a type of radiography in which the x-ray tube and film rotate around a fixed point called a fulcrum.

A

Computer tomography

41
Q

T/F: When performing an ultrasound, the area on the patient to be examined must be clipped and prepped.

A

True

42
Q

Which form of diagnostic imaging produces visual cross-sectional slices?

A

Computer tomography

43
Q

T/F: When viewing a fluoroscopy, it is important to note that the display on the screen is the reverse of a regular radiography. (example: bone appears black and lungs appear white)

A

True

44
Q

Which form of diagnostic imaging requires the patient to remain in isolation for a minimum of 48 hours after the procedure?

A

Nuclear scintigraphy

45
Q

T/F: The waste of animals that have received radioactive isotopes for diagnostic purposed must be isolated for a minimum of 48 hours.

A

True

46
Q

Which mode of ultrasound is used in cardiac assessments?

A

The M mode

47
Q

Which of the following (CT Scan or MRI) is said to have more diagnostic capabilities for tumors?

A

MRI

48
Q

T/F: Direct sunlight can damage dosimeter badges.

A

True

49
Q

T/F: Static electricity can result in a film artifact.

A

True

50
Q

What is meant by the term “film fogging”? Name one possible cause.

A

Film fogging appears as an overall foggy appearance in the film causing a decrease in contrast. It usually results from improper storage of the film resulting in damage from ambient light or scatter radiation.

Diagnostic Imaging (6 decks)

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