Veterinary Radiography Ch 17

2.

When is a lateral view of the thorax with a horizontal beam indicated?

When fluid or free air is suspected in the abdomen
When the patient cannot be properly positioned for a laterally recumbent view on the table
When fluid or free air is suspected in the thorax
When spinal cord injury is suspected

Correct Answer

A. When fluid or free air is suspected in the thorax

Explanation

A lateral view of the thorax with a horizontal beam is indicated when there is suspicion of fluid or free air in the thorax. This view allows for better visualization and assessment of the thoracic cavity, specifically the lungs and pleural spaces. It can help identify any abnormalities such as pneumothorax or pleural effusion. By using a horizontal beam, the radiologist can obtain a clear image of the thoracic structures and accurately diagnose any potential issues.

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3.

Which of the following is true?

During expiration the diaphragm is more cranial than during inspiration.
During inspiration the diaphragm is more cranial than during expiration.
During expiration the diaphragm is more caudal than during inspiration.
Any view of the abdomen should be taken during inspiration

Correct Answer

A. During expiration the diaphragm is more cranial than during inspiration.

Explanation

During expiration, the diaphragm moves upwards towards the cranial (upper) part of the body, reducing the volume of the thoracic cavity and causing air to be expelled from the lungs. During inspiration, the diaphragm moves downwards towards the caudal (lower) part of the body, increasing the volume of the thoracic cavity and allowing air to enter the lungs. Therefore, it is true that during expiration, the diaphragm is more cranial than during inspiration.

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4.

What is one advantage of taking a ventrodorsal view of the thorax as opposed to a dorsoventral view?

The VD view allows better visualization of the caudal mediastinum and accessory lung lobe.
The VD view allows better visualization of the heart.
The VD view is more comfortable for the patient in respiratory distress.
All of the above

Correct Answer

A. The VD view allows better visualization of the caudal mediastinum and accessory lung lobe.

Explanation

The ventrodorsal (VD) view allows for better visualization of the caudal mediastinum and accessory lung lobe. This means that by taking a VD view, one can see the area at the back of the chest cavity and the additional lung lobe more clearly. This is an advantage compared to a dorsoventral view, which may not provide as clear of a view of these specific areas.

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5.

When should an enema be given for a view of the abdomen?

At least 1 hour before radiography
At least 12 hours before radiography
At least 10 minutes before radiography
24 hours before radiography

Correct Answer

A. At least 1 hour before radiography

Explanation

An enema should be given at least 1 hour before radiography because it takes time for the enema solution to reach the colon and adequately cleanse the area. Giving the enema too close to the radiography procedure may not allow enough time for the solution to work effectively, resulting in a suboptimal view of the abdomen. Therefore, it is recommended to administer the enema at least 1 hour before the radiography to ensure a clear and accurate image of the abdomen.

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6.

What is the preferred exposure time for views of the thorax?

1/2 second
1/30 second
1/20 second
1/10 second

Correct Answer

A. 1/30 second

Explanation

The preferred exposure time for views of the thorax is 1/30 second. This duration allows for capturing clear and detailed images of the thorax without significant motion blur. A shorter exposure time may result in underexposed images, while a longer exposure time may lead to overexposure or motion blur, making it difficult to accurately analyze the thorax.

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7.

What may help to achieve a long scale of contrast for an abdominal view?

Low kVp and high mAs
High k V P and high mAs
High k V P and low mAs
Contrast media

Correct Answer

A. High k V P and low mAs

Explanation

To achieve a long scale of contrast for an abdominal view, high kVp and low mAs are preferred. High kVp helps to increase the penetration of the X-rays through the body, resulting in a higher contrast between the structures. Low mAs, on the other hand, reduces the amount of radiation exposure to the patient while still maintaining image quality. The combination of high kVp and low mAs helps to produce a clear and detailed image with a long scale of contrast. Contrast media may be used in certain cases to enhance the visualization of specific structures, but it is not the primary factor for achieving a long scale of contrast.

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8.

Where is the measurement taken for a lateral view of the thorax?

Cranial border of the scapula
Caudal border of the seventh rib
Cranial border of the eighth rib
Caudal border of the scapula

Correct Answer

A. Caudal border of the scapula

Explanation

The measurement for a lateral view of the thorax is taken at the caudal border of the scapula.

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9.

Why is a right lateral view of the abdomen preferred over a left lateral view?

To allow visualization of the descending colon
To allow better separation of the kidneys
So that the fundus of the stomach is closer to the cassette
So that the pylorus is as far away from the cassette as possible

Correct Answer

A. To allow better separation of the kidneys

Explanation

A right lateral view of the abdomen is preferred over a left lateral view because it allows for better separation of the kidneys. This is important for diagnostic purposes as it provides a clearer view of each kidney individually, making it easier to identify any abnormalities or pathologies.

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10.

What must the field of view include for the pharynx?

Third premolar, third cervical vertebra
Base of skull, third cervical vertebra
Zygomatic arch, third cervical vertebra
Lateral canthus of eye, third cervical vertebra

Correct Answer

A. Lateral canthus of eye, third cervical vertebra

Explanation

The field of view for the pharynx must include the lateral canthus of the eye and the third cervical vertebra. The lateral canthus of the eye refers to the outer corner of the eye where the upper and lower eyelids meet. This is important because it helps determine the position and alignment of the pharynx. The third cervical vertebra is also included in the field of view because it is located in the neck region and is closely related to the pharynx.

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Veterinary Radiography Ch 17

When should a dorsoventral view of the thorax be taken?

Quiz Preview

When is a lateral view of the thorax with a horizontal beam indicated?

Which of the following is true?

What is one advantage of taking a ventrodorsal view of the thorax as opposed to a dorsoventral view?

When should an enema be given for a view of the abdomen?

What is the preferred exposure time for views of the thorax?

What may help to achieve a long scale of contrast for an abdominal view?

Where is the measurement taken for a lateral view of the thorax?

Why is a right lateral view of the abdomen preferred over a left lateral view?

What must the field of view include for the pharynx?