Alternative Imaging Modalities

MRI, CT, Fluoroscopy, Nuclear Scintigraphy, and Endoscopy

Multiple Choice

What is the primary safety concern when entering an MRI room?

• Radiation exposure

• Projectile effect from magnetic objects

• High-frequency sound waves

• Ionizing radiation

Multiple Choice

What contrast agent is commonly used in MRI?

• Barium

• Iodine-131

• Gadolinium

• Technetium-99m

Drag and Drop

MRI uses a ​

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field and ​

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pulses to generate images.

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radiofrequency

magnetic

sound

light

electric

gravitational

thermal

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Patients must be ​

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during an MRI scan to prevent motion artifacts.

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anesthetized

walking

talking

eating

awake

sneezing

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Multiple Choice

What does CT stand for?

• Cognitive Therapy
• Cultural Theory
• Chemical Testing
• Computed Tomography

Multiple Choice

What is the main advantage of CT over traditional radiographs?

• No need for anesthesia

• No radiation used

• Produces 3D images with depth

• Better for soft tissue than MRI

Multiple Choice

Which of the following is a reason CT is preferred in trauma cases?

• Better soft tissue contrast

• Faster scan time

• No need for sedation

• No radiation exposure

Match

Match the following

• Used for quality control before scan

• Thin cross-sectional image

• Enhances visualization of blood flow

Phantom

Slice

Contrast agent

• Phantom

• Slice

• Contrast agent

Categorize

Options (10)

No radiation exposure

Uses radiation

Better for bone/air

Good for soft tissues

Quicker for trauma cases

Used for brain and spinal cord

Uses radio wavs

Uses magnetic fields

No metal allowed in room

Can have monitoring devices in the room

Categorize the following

CT

MRI

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Multiple Choice

What is a key feature of fluoroscopy that distinguishes it from radiography?

• Uses ultrasound

• Produces 3D images

• Provides real-time imaging

• Requires no radiation

Multiple Choice

What is the preferred radiation setting to reduce exposure in fluoroscopy?

• Continuous beam

• Pulsed radiation

• High mA, low kVp

• Scatter mode

Drag and Drop

Fluoroscopy is commonly used in ​

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studies to observe swallowing and GI motility.

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esophageal

cardiac

neurological

pulmonary

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The ​

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style shutter is used for collimation in fluoroscopy.

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iris

roller

panel

accordion

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Multiple Choice

What radionuclide is commonly used in equine bone scans?

• Iodine-131

• Gadolinium

• Technetium-99m

• Barium sulfate

Multiple Choice

What is a unique feature of nuclear scintigraphy compared to other imaging modalities?

• No sedation required

• Radiation comes from the machine

• Radiation comes from the patient

• It uses sound waves

Drag and Drop

The ​

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camera detects radioactive emissions from the patient.

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gamma

infrared

ultraviolet

visible light

Multiple Choice

Radioisotopes injected into a horse accumulate in what areas of the body in nuclear scintigraphy?

• Muscles and tendons
• Lungs and heart
• Skin, fur, and fatty tissues

• Areas of increased blood low / inflammation

Multiple Choice

Horses must be isolated for __________ hours after a nuclear scan.

• 2-3 hours

• 48-72 hours

• 1 week

• 12-24 hours

Open Ended

Why must a horse be isolated for 48-72 hours after nuclear scintigraphy?

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Multiple Choice

What is a major advantage of flexible endoscopes?

• Cheaper and more portable

• Better image quality and maneuverability

• No need for sedation

• Can be used in MRI

Match

Match the following

• Placed inside the patient

• Contains control knobs and suction valves

• Provides light

Insertion tube

Hand piece

Umbilical cord

• Insertion tube

• Hand piece

• Umbilical cord

Open Ended

Endoscopy can be used for the evaluation, diagnosis, and treatment of multiple body systems.

List 5 different systems where it could be used.