Large Animal Radiography Quiz

Play-Doh can be used to pack the foot in order to prevent an air artifact when radiographing the equine foot. Play-Doh is a malleable material that can be easily shaped and molded to fill any gaps or spaces in the foot. It is dense enough to block the passage of X-rays, preventing the formation of artifacts on the radiograph. Additionally, Play-Doh is non-toxic and safe to use on the foot, making it a suitable material for this purpose.

This statement is true because when imaging a dorsoplantar view of the tarsus, drawing an imaginary line from the middle of the hoof wall to the tibia helps to determine the true dorsoplantar direction. This line helps to align the structures of the foot and leg correctly in the image, ensuring accurate interpretation and diagnosis.

The correct answer is that the field of view when taking all views of the fetlock joint should include the entire fetlock joint and a small portion of the bones that are proximal and distal to the joint. This is because when imaging the fetlock joint, it is important to capture the entire joint itself as well as the surrounding structures to fully assess the condition and any potential abnormalities. Including a small portion of the bones that are proximal and distal to the joint allows for a more comprehensive evaluation of the area.

When taking all views of the fetlock joint, the field of view should not only include just the fetlock itself, but also a small portion of the bones that are proximal (above) and distal (below) to the joint. This is important because it allows for a comprehensive assessment of the joint and its surrounding structures, providing a more accurate diagnosis and evaluation of any potential issues or abnormalities. Including the entire foot or the first and second phalanges alone would not provide a complete view of the fetlock joint and its related bones.

When taking all views of the metacarpus/metatarsus, the field of view should include the joints proximal and distal to the metacarpus or metatarsus. This means that not only the metacarpus or metatarsus should be included, but also the joints that are located before and after it. This is important in order to have a comprehensive view of the entire area and to assess any potential abnormalities or injuries in the joints adjacent to the metacarpus or metatarsus. Including all of the phalanges or the entire leg is not necessary for specifically evaluating the metacarpus/metatarsus.

Chemical restraint is often required to prevent harm to the patient, the X-Ray machine, and personnel.

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In a lateral view of the metacarpus/metatarsus, the beam is centered over the midpoint of the metacarpus or metatarsus. This means that the X-ray beam is directed towards the middle of the bone structure being imaged. This positioning allows for a clear and accurate depiction of the entire metacarpus/metatarsus, ensuring that no important details are missed. By centering the beam over the midpoint, the joint is also included in the image, providing additional information about the surrounding structures and any potential abnormalities.

When trying to visualize a lateral splint, the cassette should be positioned MEDIALLY. The cassette should only be positioned laterally if you are trying to visualize a medial splint.

The beam is centered over the middle of the tarsal joint, which is located approximately 4 inches distal to the calcaneal tuberosity. This positioning allows for a true dorsoplantar view of the joint, providing a clear and accurate image.

In a caudocranial view of the stifle, the beam is centered over the stifle joint, which is located approximately 4 inches distal to the patella. This positioning allows for a clear and accurate image of the stifle joint, capturing any abnormalities or injuries that may be present in that area.

The correct answer is "The entire tarsal joint and the joints proximal and distal to the tarsus." This means that when taking all views of the tarsus, the field of view should include not only the tarsus itself but also the joints that are connected to it. This is important because it allows for a comprehensive evaluation of the tarsus and its surrounding structures, providing a more accurate assessment of any potential abnormalities or injuries. Including all of the phalanges or the entire leg would be excessive and unnecessary for specifically evaluating the tarsus.

The correct answer is 4 inches distal to the patella. This means that the beam should be centered 4 inches below the patella. By positioning the beam at this location, the stifle joint, which is the joint between the femur and tibia in the hind limb, can be visualized clearly in radiographic views. Positioning the beam too high or too low would not provide an optimal view of the stifle joint.

When taking a dorsopalmar/dorsoplantar view of the proximal phalanges, the beam is centered over the area of interest. This means that the X-ray beam is directed towards the specific region of the proximal phalanges that is being examined. This allows for a clear and accurate image of the bones in that area to be captured.

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Both option b (a wood block with a slot to hold the cassette) and option c (a cassette holder with a clamp and long handle) can be used to protect the assistant during a lateral view of the distal phalanx. These devices are designed to hold the cassette in place and provide a stable platform for imaging, reducing the risk of the assistant's hand being exposed to radiation.

When taking lateral and medial oblique views of the fetlock joint, the beam is centered through the middle of the joint at a 30-to 45-degree angle from the dorsal midline of the joint. This positioning allows for optimal visualization of the joint space and structures, providing a comprehensive view of the area of interest. By angling the beam in this manner, the radiograph captures the joint from a different perspective, aiding in the diagnosis and assessment of any potential abnormalities or pathology.

A lateral or medial oblique view of the fetlock joint is able to show the lateral or medial sesamoid bones on the palmar/plantar aspect of the limb. This means that this type of view allows for a clear visualization of these specific bones in the fetlock joint.

When taking a dorsopalmar view of the carpus, the beam is centered over the middle of the carpus joint at the true dorsopalmar plane. This means that the x-ray beam is directed perpendicular to the cassette and passes through the joint at a right angle. This positioning allows for a clear and accurate image of the carpal bones and their alignment.

When taking a lateral view of the elbow, the beam is centered over the middle of the elbow joint. This ensures that the image captures the entire joint and provides a clear view of any abnormalities or injuries in that area. By positioning the beam over the middle of the joint, it allows for accurate assessment of the joint space and alignment, which is important for diagnosing conditions such as fractures, dislocations, or arthritis.

When performing a pelvic X-Ray on an equine patient, allowing the legs to be in the "frog-leg" position is true. This position helps to provide a clear and accurate view of the pelvic region, allowing for better evaluation of the bones and joints. By positioning the legs in this way, the X-Ray can capture a more comprehensive image, enabling the veterinarian to make a more accurate diagnosis if there are any abnormalities or injuries present in the pelvic area.

When taking all views of the distal phalanx (pedal/coffin bone), the field of view should include the entire hoof. This means that the X-ray should capture not only the distal phalanx but also the surrounding structures such as the hoof wall, sole, and frog. Including the entire hoof in the field of view allows for a more comprehensive assessment of the bone and its relationship to the surrounding structures, which is important for diagnosing and treating any potential issues or injuries.

When taking all views of the carpus except for the flexed lateral view, the field of view should include the joints proximal and distal to the carpus. This means that the joints above and below the carpus should be visible in the imaging. The carpus itself should also be included in the field of view. However, the entire leg and all of the phalanges are not necessary to be included in the field of view for this particular imaging.

When taking a flexed lateral view of the carpus, the field of view should include the entire carpus joint. This means that the image should capture the entire wrist joint, including all the bones and structures within it. The other options mentioned, such as the joints proximal and distal to the carpus, all of the phalanges, and the entire leg, are not necessary to include in the field of view for this specific view of the carpus.

The correct answer is "Over middle of bulbs of the heel." When taking a flexor view of the navicular bone, the beam is centered over the middle of the bulbs of the heel. This positioning allows for optimal visualization and assessment of the navicular bone and surrounding structures.

When taking a dorsopalmar/dorsoplantar view of the distal phalanx (pedal/coffin bone), the beam is centered over the middle of the pedal bone just below the coronary band. This positioning allows for a clear and accurate image of the distal phalanx, which is important for diagnosing and evaluating conditions or injuries in the foot of the horse. Placing the beam in this location ensures that the entire pedal bone is visible and any abnormalities can be properly assessed.

Raising the limb opposite to the limb being radiographed restricts patient movement, which is advantageous during the radiographic procedure. It helps to immobilize the patient and reduce the risk of motion blur, ensuring that the image captured is clear and accurate. This is especially important when imaging a specific area or joint, as any movement can affect the quality of the image and make it difficult to interpret the results. By restricting patient movement, the radiographer can obtain a better image for diagnosis and treatment planning.

The beam is centered for a skyline view of the carpus through the row of carpal bones of interest. This means that the X-ray beam is directed towards the carpal bones in a way that it passes through them, allowing for a clear view of these bones. This view is commonly used to assess for fractures or other abnormalities in the carpal bones. The other options, such as the distal radius, distal ulna, or patella, are not correct because they do not accurately describe the specific area of interest for a skyline view of the carpus.

Both statements b and c are correct. The cassette must be in the mouth in order to obtain views of the incisors. Additionally, sedation may be necessary for some patients in order to obtain clear and accurate views of the incisors.

When taking a flexed lateral view of the fetlock joint, the beam is centered through the joint at a right angle to the cassette. This means that the x-ray beam is directed through the joint, perpendicular to the plane of the cassette. This positioning allows for a clear and accurate image of the fetlock joint, providing a comprehensive view of any abnormalities or injuries in that area.

When taking lateral and medial oblique views of the metacarpus/metatarsus, the beam is centered at the middle of the metacarpus/metatarsus, approximately 45 degrees lateral or medial to a true dorsopalmar/dorsoplantar projection. This positioning allows for optimal visualization of the area of interest while avoiding overlap of structures. By angling the beam, it provides a different perspective and helps to highlight specific anatomical features.

The beam is centered over the middle of the tarsal joint approximately 4 inches distal to the calcaneal tuberosity when taking a lateral or medial oblique view of the tarsus. This positioning allows for optimal visualization of the tarsal joint and surrounding structures.

When taking a craniocaudal view of the elbow, the beam should be centered over the middle of the joint, specifically over the cranial midline. This ensures that the entire joint is captured on the image. By positioning the beam in this way, any abnormalities or injuries in the elbow joint can be properly visualized and diagnosed.

When taking a lateral view of the shoulder, the beam is centered over the shoulder joint. This means that the x-ray beam is directed towards the area of interest, which is the shoulder joint. By centering the beam over the joint, a clear and accurate image of the shoulder can be obtained, allowing for proper evaluation and diagnosis of any potential issues or injuries.

The beam is centered over the stifle joint space, approximately 4 inches distal to the patella. This positioning allows for optimal visualization of the joint space and surrounding structures.

These types of radiographs are typically only taken at very specialized practices!

When taking a skyline view of the carpus, the field of view should include the dome of the carpus. This means that the X-ray should be focused on the top part of the carpus, capturing the joint and bone structure in that area. The other options, such as just the carpus, the joints proximal and distal to the carpus, or the entire leg, are not correct because they do not specifically target the dome of the carpus.

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When taking a lateral view of the proximal phalanges, the beam is centered over the area of interest. This means that the X-ray beam is directed towards the specific region of the proximal phalanges that needs to be imaged. This ensures that the desired area is captured clearly on the X-ray image.

When taking a dorsoplantar/dorsopalmar view of the metacarpus/metatarsus, the beam is centered over the midpoint of the metacarpus or metatarsus. This ensures that the entire area of interest is captured in the radiograph. Placing the beam over the area of interest, through the joint perpendicular to the cassette, or through the joint at a right angle to the cassette may result in incomplete imaging of the metacarpus/metatarsus.

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The correct answer is that for a flexed lateral view of the fetlock, the cassette is placed against the medial aspect of the limb, perpendicularly to the floor. This means that the cassette should be positioned on the inner side of the limb, at a right angle to the floor. This positioning allows for a clear and accurate image of the fetlock joint in a flexed position, providing a better visualization of any abnormalities or injuries in that area.

Oblique views are necessary for dental arcades to avoid superimposition of the opposite arcade. This means that by taking oblique views, the dentist can get a better and clearer view of the teeth in one arcade without the overlapping or obscuring of the teeth in the opposite arcade. This is important for accurate diagnosis and treatment planning in dentistry.

When taking a lateral view of the carpus, the beam is centered over the lateral aspect of the limb through the carpus joint. This means that the x-ray beam is directed perpendicular to the cassette and passes through the joint at a right angle. This positioning allows for a clear and accurate image of the carpus joint, which is the area of interest in this case.

When taking a flexed lateral view of the carpus, the beam is centered over the lateral aspect of the limb through the carpus joint. This ensures that the X-ray captures the desired area of interest, which is the carpus joint. By positioning the beam over the lateral aspect of the limb, the X-ray can penetrate through the joint at the correct angle to obtain a clear image of the carpus joint.

The beam is centered through the middle of the carpus angled approximately 45 degrees from the dorsal midline of the joint. This positioning allows for a lateral or medial oblique view of the carpus, providing a clear image of the joint from a specific angle. By angling the beam, the radiologist can visualize the carpal bones and surrounding structures more effectively, aiding in the diagnosis and assessment of any abnormalities or injuries.

When taking a dorsoplantar view of the tarsus, the beam should be centered through the middle of the joint at a true dorsoplantar plane. This means that the beam should pass through the center of the joint in a direction that is perpendicular to the cassette. This positioning allows for a clear and accurate image of the tarsus joint, providing a true representation of the anatomy and any potential abnormalities or injuries.