radiology AI-generated flashcards

exam 3

What are the common views for imaging the coffin bone in large animals?

Lateral and 45 degree dorsopalmar.

What imaging methods have replaced standard x-ray imaging in large animals?

MRI, CT, and nuclear scintigraphy.

What principles apply to both small and large animal radiology?

Principles of radiology and radiation safety.

How many views are generally required for most positions in horses during imaging?

A minimum of four views, and six for many joints.

What is the significance of the primary beam placement in radiology?

It must be centered on the bone or joint in question.

What precautions should be taken when using portable x-ray machines in large animal facilities?

Safety concerns related to radiation exposure and potential movement artifacts.

What is the purpose of using substances like play-doh or methylcellulose when preparing the equine foot for imaging?

To pack the sulci and eliminate gas shadows caused by the grooves of the frog.

What is the use of the PennHIP technique?

To evaluate hip dysplasia in dogs.

What characteristics define the Nordberg angle in hip evaluations?

A line connecting the centers of the femoral heads and secondary lines to the acetabular rims.

What is Osteosarcoma in veterinary medicine?

The most common primary bone tumor in dogs, often aggressive and typically affecting long bones.

What are the types of fractures classified in veterinary radiology?

Incomplete, complete (transverse, oblique, spiral), segmented, and pathologic fractures.

What is the major concern when using barium sulfate as a contrast medium?

The risk of upper or lower perforation of the GI tract.

What imaging technique is preferred for performing an esophagography study?

Fluoroscopy.

What are the common indications for performing a retrograde cystography?

Evaluate the urinary bladder with either positive, negative, or double contrast study.

What types of contrast agents are used in excretory urography?

Water-soluble iodide, ionic iodide, and nonionic iodide.

Why are digital radiography (DR) systems advantageous over traditional film-based systems?

Improved safety, minimal repeat exposures, and the absence of chemical processing.

What are the four types of contrast agents in veterinary radiology?

Soluble ionic, soluble nonionic, insoluble inert, and radiolucent gases.

In imaging avian species, which positioning is used for ventrodorsal whole body views?

Dorsal recumbency with the neck extended.

What is the purpose of using positioning aids when imaging small mammals?

To maintain proper alignment and avoid motion artifacts.

What is the role of contrast agents in veterinary radiology?

Contrast agents enhance the visibility of structures or fluids within the body during imaging.

What are the potential side effects of using contrast agents in animals?

Possible allergic reactions, kidney toxicity, or interference with certain diagnostic tests.

What distinguishes ionic contrast agents from nonionic contrast agents?

Ionic agents have higher osmolality and can be more likely to cause adverse reactions compared to nonionic agents.

What is the most common use of insoluble inert contrast agents?

To opacify the gastrointestinal tract in radiographic studies.

In what situations are radiolucent gases used as contrast agents?

To provide negative contrast in areas such as the gastrointestinal tract or during certain imaging studies.

What is a double contrast study in veterinary radiology?

A technique that uses both a positive contrast agent and a negative contrast agent to enhance visualization of hollow organs.

What are the main purposes of performing a contrast study in veterinary diagnostics?

To assess the structure and function of specific organs or systems, such as the gastrointestinal or urinary tract.

How does positive contrast improve imaging results?

It provides a denser image area that appears brighter on the radiograph, highlighting the organ being studied.

What are some common types of positive contrast agents used in veterinary radiology?

Barium sulfate and water-soluble iodide compounds.

When is a negative contrast study particularly useful?

In cases where delineation of the organ's outline is needed, often using gases to provide clarity.

What is the significance of timing in contrast studies?

Timing can affect the distribution and visibility of the contrast agent, necessitating precise scheduling of imaging.

What precautions should be considered before a contrast study?

Ensure no history of allergies to contrast agents, assess kidney function, and confirm appropriate fasting for the patient.

What role does fluoroscopy play in contrast studies?

Fluoroscopy allows real-time visualization of organs and systems during the administration of contrast agents.

What is the basic principle behind using iodinated contrast agents in radiology?

Iodine has a high atomic number which enhances X-ray absorption, making tissues and blood vessels more visible.

What factors influence the choice of contrast agents in veterinary radiology?

Type of study, patient's health status, allergy history, and the specific organ being evaluated.