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Danb Week 1 > Week 2 > Flashcards

Week 2 Flashcards

1
Q

The size and shape of the primary beam is controlled primarily by the:

A

Collimator

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2
Q

When radiographs are properly prescribed, exposed, and processed, the benefit of disease detection ___ the risk of small doses of x-radiation.

A

Far outweighs

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3
Q

When x-radiation has passed through tissue or matter:

A

It has reduced penetrating ability and changes direction.

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4
Q

The best type of x-ray to penetrate body tissue is:

A

Hard rays, short wavelength

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5
Q

Before seating the patient it is necessary to cover which of the following items with disposable plastic wrap?

A

X-ray exposure control panel

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6
Q

An exposed x-ray film covered with a plastic barrier envelope is considered to be:

A

Contaminated

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7
Q

The dental assistant must utilize which of the following personal protective equipment (PPE) when exposing films?

A

Glove

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8
Q

The lead diaphragm determines the size and shape of the:

A

X-ray beam

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9
Q

The portion of the target that is struck by electrons is called the:

A

Focal spot

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10
Q

Scatter radiation is a type of:

A

Secondary radiation

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11
Q

The quality or penetrating power of secondary radiation is:

A

Less than that of primary radiation.

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12
Q

What is the small circular radiolucency below the mandibular incisor roots called?

A

Lingual foramen

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13
Q

Appropriate infection control procedures during x-ray exposure should include:

A

Placement of a disposable wrap over the x-ray tube head.

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14
Q

Which of the following are considered to be semi-critical instruments?

A

X-ray film-holding devices.

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15
Q

Approximately what percentage of the kinetic energy of the electrons is converted to x-rays at the anode?

A

Less than 1%

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16
Q

Which of the following statements is true concerning cleaning and disinfection of the dental unit and environmental surfaces?

A) An intermediate-level disinfectant is recommended
B) A low-level disinfectant is recommended
C) EPA- registered chemical germicides labeled as both hospital disinfectants ad tuberculocidals are classified as low-level disinfectants.
D) Both A and C

A

A) An intermediate-level disinfectant is recommended

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17
Q

The thyroid collar:

A) Is recommended for all intraoral films
B) Is recommended for lil extraoral films
C) May exist as a separate shield o as a part of the lead apron
D) Both A and C

A

D) Both A and C

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18
Q

Preparation fo the dental radiographer should include:

A

Optional use of the surgical mask and eyewear

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19
Q

Reusable film holders must be ___ after each use.

A

Sterilized

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20
Q

The ___ forms the floor of the orbit of the eyes, the sides and floor of the nasal cavity, and the hard palate.

A

Maxilla

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21
Q

According to the current recommendations (2003) of the National Council on Radiation Protection and Measurements, the current MPD for a occupational exposed pregnant women is the same as that for:

A

A non occupationally exposed person

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22
Q

Radiation monitoring can be used to protect the dental radiographer and includes monitoring of:

A

Both equipment and personnel

23
Q

The ___ is an opening or hole in bone that is located in the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors.

A

Incisive foramen

24
Q

Which of the following components of the x-ray machine would have an indicator light for the on-off switch and an indicator light for the exposure button?

A

The control panel

25
Q

The time interval between radiographic examinations for children should be based on:

A

The individual needs of the child.

26
Q

Protective clothing:

A) Must prevent skin exposure when contact with blood or other bodily fluids is anticipated.
B) Should be worn home and laundered daily
C) Both A and B

A

C) Both A and B

27
Q

Which is the most common possibility when an x-ray photon interact with matter?

A

Compton scatter

28
Q

The collimator:

A

Restricts the size and shape of the beam

29
Q

All dental professionals must use surgical masks and protective eyewear to protect the eyes and face:

A

Whenever spatter and aerosolized sprays of blood and saliva are likely.

30
Q

The consumer - Patient Radiation Health and Safety Act:

1) Outlines requirements for the safe use of dental x-ray equipment.
2) Establishes guidelines for the proper maintenance of x-ray equipment.
3) Requires persons who take dental radiographs be properly trained and certified.

A

1,2,3

31
Q

Te primary dictum of operator protection guidelines is the operator must:

A

Avoid the primary beam.

32
Q

Radioactivity is:

A

The process by which certain unstable atoms of elements undergo spontaneous disintegration, or decay, in an effort to attain a more balanced nuclear state.

33
Q

___ is defined as th absence of pathogens, or disease-causing microorganisms.

A

Asepsis

34
Q

A ___ eliminates the need for the patient to stabilize the film.

A

Film holder

35
Q

The purpose of the anode is to:

A

Convert electrons into x-ray photons

36
Q

Within the X-ray tube, electrons are generated by the:

A

Tungsten filament in the cathode.

37
Q

Which of the following is true of the wave concept of electromagnetic radiation?

A

Frequency and wavelength are inversely related.

38
Q

To avoid occupational exposure to x-radiation, dental radiographer must always: (Note: though all are true, on is the most critical and encompasses the others.)

A) Maintain an adequate distance
B) Have proper positioning
C) Have proper positioning
D) Avoid the primary beam

A

D) Avoid the primary beam

39
Q

Which type of PID would be most effective in reducing patient exposure?

A

16-inch rectangular PID

40
Q

An operator has received .5 rem (.005 sieverts) for the year. It is true that:

A

The operator is below the maximum permissible dose or the year.

41
Q

The best protection for the operator when exposing radiographs is.

A

Block or concrete wall

42
Q

The ALARA concept relies on the operator technique to:

A

Reduce x-ray exposure

43
Q

The most effective exposure policy for reducing unnecessary patient radiation is:

A

Determine exposures based on patient need.

44
Q

X-ray that are most likely to cause damage which are removed by the filter are:

A

Long wave length

45
Q

X-radiation that has passed through the object is termed:

A

Secondary radiation

46
Q

The negatively charged part of the X-ray tube is the:

A

Cathode

47
Q

The chief source of the radiation exposure to the operator is:

A

Scattered radiation

48
Q

Who should hold the film in a patients mouth when they are unable?

A

Patient’s friend or relative.

49
Q

Which is the best method for preventing cross contamination off the tube head during exposure?

A

Barrier wrap

50
Q

How should exposed patient films be handled?

A

While wearing exam gloves

51
Q

The dental radiograph is a ___ -dimensional picture of a ___ -dimensional object.

A

Two, three

52
Q

The superior foramina of the incisive anal are ___ tiny openings or holes in bone.

A

Two

53
Q

Which off the following radiographic landmarks would appear radiolucent?

A

Suture

Danb Week 1 (4 decks)

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