Veterinary Radiography Ch 12

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C. 12: General principles of positioning

radiography in veterinary technology (4th ed. ) - Lisa M Lavin

Questions and Answers

1.

Fill in the blanks from the following choices. When radiographing a dorsopalmar view of an animal's limb, the primary x-ray beam enters the _________ of the paw and exits through the _________ aspect.
- A.
  
  Cranial aspect; caudal aspect
- B.
  
  Dorsal aspect; palmar aspect
- C.
  
  Medial aspect; lateral aspect
- D.
  
  Lateral aspect; medial aspect
Correct Answer
B. Dorsal aspect; palmar aspect

Explanation
When radiographing a dorsopalmar view of an animal's limb, the primary x-ray beam enters the dorsal aspect of the paw and exits through the palmar aspect.

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1
0
2.

The positional term used to describe the part of the pelvic limb found toward the tail and proximal to the tarsus (hock) is:
- A.
  
  Caudal
- B.
  
  Plantar
- C.
  
  Rostral
- D.
  
  Palmar
Correct Answer
A. Caudal

Explanation
The term "caudal" refers to the part of the pelvic limb that is located towards the tail and proximal to the tarsus (hock). This term is commonly used in anatomy to describe the position or direction of a body part. In this case, "caudal" is the correct answer because it accurately describes the location of the pelvic limb in relation to the tail and tarsus.

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3.

If a body part to be radiographed has a significant difference in desnity betwen its thickest and thinnest parts, do the following:
- A.
  
  Measure and radiograph the thickest part
- B.
  
  Measure and radiograph the thinnest part
- C.
  
  Use the average measurement to determine the area over which to center the x-ray beam
- D.
  
  Take two separate exposures with different measurements
Correct Answer
D. Take two separate exposures with different measurements

Explanation
When a body part has a significant difference in density between its thickest and thinnest parts, taking two separate exposures with different measurements is the best approach. This is because a single exposure may not accurately capture the entire range of densities in the body part. By taking two separate exposures with different measurements, the radiographer can ensure that both the thickest and thinnest parts are adequately captured on the radiograph. This allows for a more comprehensive evaluation of the density differences within the body part.

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4.

True/False: Two views at 180-degree angles from each other are always required for each anatomic part.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Two views at 90 degrees are required because radiographs are two-dimensional views of three-dimensional structures.

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5.

The anatomic area of interest should be as close to the film as possible in order to do the following:
- A.
  
  Reduce distortion
- B.
  
  Increase magnification
- C.
  
  Enlarge the area of interest as much as possible
- D.
  
  Keep the structure as far from the cathode as possible
Correct Answer
A. Reduce distortion

Explanation
To reduce distortion in radiography, it is important for the anatomic area of interest to be as close to the film as possible. When the subject is closer to the film, there is less chance for distortion to occur due to the decreased distance between the object and the film. This allows for a more accurate representation of the anatomical structures being imaged.

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6.

What is the minimum desired thickness of lead sheets used to block films?
- A.
  
  1 mm
- B.
  
  5 mm
- C.
  
  2 mm
- D.
  
  2 cm
Correct Answer
C. 2 mm

Explanation
The minimum desired thickness of lead sheets used to block films is 2 mm. This thickness is necessary to effectively block the radiation emitted by the film and protect individuals from exposure. Thicker lead sheets would provide even more protection, but 2 mm is the minimum thickness required for adequate shielding.

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7.

What can be used in place of a lead sheet to block part of a film?
- A.
  
  Another cassette
- B.
  
  Collimating as close to the area as possible
- C.
  
  Thick books
- D.
  
  Lead-lined gloves
Correct Answer
D. Lead-lined gloves

Explanation
Lead-lined gloves can be used in place of a lead sheet to block part of a film. Lead is a dense material that is effective at blocking radiation, and lead-lined gloves provide a convenient and flexible way to shield specific areas of a film from exposure. This can be useful in situations where only certain parts of the film need to be protected, or when a lead sheet is not readily available or practical to use.

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8.

When radiographing a dog's abdomen, where should the primary x-ray be focused?
- A.
  
  Cranial border of eleventh rib
- B.
  
  Caudal border of thirteenth rib
- C.
  
  Xiphoid
- D.
  
  Cranial border of thirteenth rib
Correct Answer
B. Caudal border of thirteenth rib

Explanation
The primary x-ray should be focused on the caudal border of the thirteenth rib when radiographing a dog's abdomen. This is because the thirteenth rib is the last rib in the abdomen, and focusing on its caudal border ensures that the entire abdomen is captured in the x-ray image.

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9.

If an animal's thorax is radiographed while in right lateral recumbency, what marker should be used?
- A.
  
  R
- B.
  
  L
- C.
  
  RF
- D.
  
  LF
Correct Answer
A. R

Explanation
If an animal's thorax is radiographed while in right lateral recumbency, the marker that should be used is "R" which stands for right. This marker helps to indicate the side of the animal that is being imaged, ensuring that the radiograph is properly oriented and interpreted by the veterinarian or radiologist.

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10.

Where should the marker be placed for a limb radiographed in lateral recumbency?
- A.
  
  Dorsal to the limb
- B.
  
  Caudal to the limb
- C.
  
  At the most distal aspect of the limb
- D.
  
  Cranial to the limb
Correct Answer
D. Cranial to the limb

Explanation
The marker should be placed cranial to the limb when radiographing a limb in lateral recumbency. This is because the marker helps to provide proper orientation and identification of the limb in the radiograph. Placing the marker cranial to the limb ensures that it is visible and does not obstruct the view of the limb in the radiograph.

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Current Version
Mar 20, 2023

Quiz Edited by
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Feb 24, 2012

Quiz Created by
Wmm502

Veterinary Radiography Ch 12

Fill in the blanks from the following choices. When radiographing a dorsopalmar view of an animal's limb, the primary x-ray beam enters the _ of the paw and exits through the _ aspect.

The positional term used to describe the part of the pelvic limb found toward the tail and proximal to the tarsus (hock) is:

If a body part to be radiographed has a significant difference in desnity betwen its thickest and thinnest parts, do the following:

True/False: Two views at 180-degree angles from each other are always required for each anatomic part.

The anatomic area of interest should be as close to the film as possible in order to do the following:

What is the minimum desired thickness of lead sheets used to block films?

What can be used in place of a lead sheet to block part of a film?

When radiographing a dog's abdomen, where should the primary x-ray be focused?

If an animal's thorax is radiographed while in right lateral recumbency, what marker should be used?

Where should the marker be placed for a limb radiographed in lateral recumbency?

Veterinary Radiography Ch 12

Fill in the blanks from the following choices. When radiographing a dorsopalmar view of an animal's limb, the primary x-ray beam enters the _________ of the paw and exits through the _________ aspect.

The positional term used to describe the part of the pelvic limb found toward the tail and proximal to the tarsus (hock) is:

If a body part to be radiographed has a significant difference in desnity betwen its thickest and thinnest parts, do the following:

True/False: Two views at 180-degree angles from each other are always required for each anatomic part.

The anatomic area of interest should be as close to the film as possible in order to do the following:

What is the minimum desired thickness of lead sheets used to block films?

What can be used in place of a lead sheet to block part of a film?

When radiographing a dog's abdomen, where should the primary x-ray be focused?

If an animal's thorax is radiographed while in right lateral recumbency, what marker should be used?

Where should the marker be placed for a limb radiographed in lateral recumbency?

Fill in the blanks from the following choices. When radiographing a dorsopalmar view of an animal's limb, the primary x-ray beam enters the _ of the paw and exits through the _ aspect.