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X-Ray > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q 
The x-ray room has an area that protects the limited operator from scatter radiation. This area is called the:
A: control console
B. transformer
C. control booth
D. radiation field
A

C. control booth

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2
Q 
The mechanism on the x-ray tube crane that provides "stops" in a specific location is the:
A. control console
B. transformer
C. tube port
D. detent
A

D. detent

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3
Q 
The image that has been exposed on the image receptor (IR) but has not been processed is called the:
A. remnant radiation
B. scatter radiation
C. latent image
D. visible image
A

C. latent image

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4
Q 
The absorption of x-rays by matter is called:
A. fog
B. attenuation
C. remnant radiation
D. exit radiation
A

B. attenuation

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5
Q 
The image receptor (IR) system may consist of the following:
A. control console and transformer
B. X-ray tube and tube stand
C. Tube locks and detent
D. Cassette and phosphor plate
A

D. Cassette and phosphor plate

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6
Q 
A line that is perpendicular to the long axis of the x-ray  tube and that is in the center of the x-ray beam is called the:
A. central ray
B. scatter radiation
C. x-ray tube
D. primary x-ray beam
A

A. central ray

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7
Q 
The device that protects the IR from being fogged by scatter radiation is called a
A. detent
B. grid or bucky
C. cassette
D. collimator
A

B. grid or bucky

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8
Q 
The device that allows the limited operator to vary the size of the radiation field is called the:
A. collimator
B. tube port
C. control console
D. detent
A

A. collimator

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9
Q

The purpose of a safety check performed before making an exposure is to:
A. ensure a quality radiographic image.
B. prevent a radiation hazard to oneself.
C. prevent accidental exposure of co-workers.
D. protect the patient from unnecessary exposure.

A

C. prevent accidental exposure of co-workers

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10
Q

A radiation hazard exists in the x-ray room:
A. throughout the room during an exposure
B. only in the path of the primary x-ray beam during an exposure.
C. throughout the room at all times.
D. throughout the room during exposure and for several minutes afterward.

A

A. throughout the room during an exposure

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11
Q 
A type of filmless x-ray system that produces digital images is called:
A. a remnant system
B. mobile radiography
C. an image receptor (IR)
D. computed radiography (CR)
A

D. computed radiography (CR)

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12
Q 
Digital images produced using the CR systems use a(n) \_\_\_\_\_\_\_\_\_\_\_\_\_ to process the image. 
A. darkroom and chemical processor
B. image reader device
C. computer with an SSD hard drive
D. special high-capacity computer
A

B. image reader device

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13
Q 
The most frequent adverse incident that occurs in a radiology department is:
A. bleeding
B. pinching of fingers
C. falling
D. back pain
A

C. falling

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14
Q 
After the x-rays have gone into the patient, and some have been attenuated, the x-rays will exit the patient. This exit radiation is now called:
A. remnant radiation
B. primary radiation
C. scatter radiation
D. quality radiation
A

A. remnant radiation

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15
Q

How can you determine the location of the central ray?

A

Turn on the collimator light. The crosshair in the center of the illuminated radiation field indicates the location of the central ray.

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16
Q

What is the location of remnant radiation?

A

Between the patient and the IR, on the side of the patient opposite that of the x-ray tube

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17
Q

What is meant by attenuation?

A

Attenuation is the term used to refer to absorption of the x-ray beam. Attenuation results in the production of scattered radiation.

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18
Q

What component of the x-ray machine is located in the control booth?

A

The control console also called the control panel

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19
Q

What should you do before attempting to move x-ray equipment?

A

Release the appropriate lock(s).

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20
Q

Where would you look to find a collimator?

A

On the underside of the x-ray tube housing

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21
Q

How might you determine the size of the radiation field without actually measuring it?

A

By reading the scale on the face of the collimator

22
Q

List the four steps in a pre-exposure safety check

A

The x-ray room door is closed.
No nonessential persons are in the x-ray room.
All persons in the control booth are completely behind the lead barrier.
No cassettes are in the room except the one in use

23
Q

How soon is it safe to re-enter the x-ray room after an exposure?

A

Immediately. X-rays travel at the speed of light and do not linger in the room. They are present only during exposure.

24
Q

Define the difference between primary and remnant radiation.

A

Primary radiation is defined as the x-ray beam that leaves the tube and is unattenuated, except by air. Its direction and location are predictable and controllable. Remnant radiation is what remains of the primary beam after it has been attenuated by matter. Because the pattern of densities in the matter results in differential absorption of the radiation, this pattern will be inherent in the remnant radiation. The pattern of the remnant radiation creates the IR image.

25
Q

What are the common sizes of CR plates?

A

8 × 10 inches, 10 × 12 inches, 14 × 14 inches, 14 × 17 inches, and 14 × 36 inches.

26
Q

Describe the Trendelenburg position.

A

The patient is placed on the x-ray table, and the table is tilted so the head is lower than the feet. The angle is typically at least 15 degrees.

27
Q

Describe the latent image.

A

The latent image is the unseen image that is on the IR after exposure.

28
Q

Many x-ray projections are done with the patient standing or sitting upright using what device?

A

Upright cassette holder

29
Q

X-rays exit the tube port through an opening called the:

A

Port

30
Q

The x-ray tube is surrounded by a lead-lined device called the:

A

Tube housing

31
Q

The invisible imaginary line in the center of the x-ray beam that is used for centering is called the:

A

Central ray

32
Q

The square lighted area on the patient and table where the x-rays strike is called the:

A

radiation field

33
Q

What is the name of the radiation that exits the patient?

A

Remnant

34
Q

The unseen image contained within the plate phosphor is called the:

A

Latent image

35
Q

The x-ray beam that leaves the tube is called:

A

Primary beam

36
Q

The absorption of x-rays by the human body is called:

A

Attenuation

37
Q

The primary source of scatter radiation is the:

A

Patient

38
Q

Primary-beam x-rays that leave the body and travel in all directions are called:

A

Scattered radiation

39
Q

What is the difference in energy between the primary-beam radiation and the scattered radiation?

A

Scattered radiation has less energy

40
Q

The unwanted radiation exposure on the x-ray image caused by scatter radiation is called:

A

Scatter radiation fog

41
Q

Scatter radiation exits the patient in which direction?

A

All directions, or 360 degrees

42
Q

In the radiology department today, the IR consist of what two components?

A

Cassette and phosphor plate

43
Q

Which digital imaging system do most limited operators use today?

A

Computed radiography (CR)

44
Q

What is the name of the device that accepts the CR plate and scans it?

A

CR reader

45
Q

The most frequent adverse incident that occurs in the radiology department is:

A

Falling

46
Q

Name several key safety precautions that should occur when moving x-ray equipment

A
  1. Test the footboard and shoulder guards to ensure they are securely attached.
  2. Be certain the spaces under the table are clear before tilting the table.
47
Q

What is the name of the movable device under the x-ray table that contains a grid and holds the IR?

A

the bucky

48
Q

The device that allows x-rays to be taken in the upright position is called the:

A

upright cassette holder

49
Q

Lowering the head on the x-ray table at least 15 degrees is termed:

A

Trendelenburg

50
Q

Name several important pre-exposure safety checks:

A
  1. Close the x-ray room door.
  2. Ask nonessential persons to leave the room.
  3. Ensure all persons in the x-ray room are behind the control booth.
  4. Ensure that no IRs are in the room.

X-Ray (3 decks)

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