Cross-sectional Anatomy Test! Radiography Trivia Quiz

Extending the finger during a finger x-ray is important because it helps to keep the joint spaces open. This allows for a clearer and more accurate image of the finger joints, which can help in diagnosing any potential joint issues or injuries. By extending the finger, the joint spaces are not compressed or overlapped, ensuring that the x-ray captures a proper view of the finger's anatomy.

In upper extremity radiography, it is important for both the bony cortical outlines and trabecular patterns to be sharply defined. This ensures clear visualization of the bones and their internal structures, allowing for accurate diagnosis and assessment of any abnormalities or injuries.

The humerus is x-rayed at the highest kVp range because it is a larger and denser bone compared to the forearm, elbow, and lateral hand. The higher kVp range is needed to penetrate the dense bone and produce a clear image.

All three views are centered at the PIP for the affected finger.

Both a PA oblique finger and a PA oblique hand require 45 degrees of rotation. This means that the X-ray beam needs to be angled at 45 degrees to the patient's hand or finger in order to obtain the desired image. This oblique view allows for better visualization of certain structures and can help in diagnosing certain conditions or injuries.

To avoid soft tissue overlap between fingers in PA hand and finger x-rays, it is recommended to spread the fingers slightly. This helps to separate the soft tissues and allows for better visualization of the bones and structures in the hand and fingers. By spreading the fingers, it reduces the chances of overlapping and provides a clearer image for diagnostic purposes.

A finger x-ray should have the CR centered perpendicular to the finger at the PIP (proximal interphalangeal) joint. This is the joint that is located between the first and second phalanges of the finger. Centering the CR at this point ensures that the image captures the specific area of interest and provides a clear view of the joint for accurate diagnosis.

The 1st digit is the thumb.

The correct answer is 55-65. This range of kilovoltage peak (kVp) is suitable for radiographing an elbow. The kVp determines the energy of the x-ray beam, and a higher kVp is needed for thicker body parts, such as the elbow, to ensure proper penetration and image quality. The range of 55-65 kVp provides sufficient energy for the x-ray beam to pass through the elbow and produce a clear radiographic image.

In a lateral finger projection, the unaffected fingers should be flexed. This means that the fingers should be bent or curved inward towards the palm of the hand. Flexing the fingers helps to minimize any overlapping or obscuring of the structures being imaged, allowing for a clearer and more accurate lateral view of the finger.

The IP, MP, and CM joint spaces are all OPEN, and the phalanges are demonstrated WITHOUT foreshortening as long as the thumb is positioned flat against and placed parallel with the IR.

The correct answer is 55-65. This range of kilovoltage peak (kVp) is suitable for radiographing a forearm. The kVp determines the quality and penetration of the X-ray beam, and a higher kVp range is needed for thicker body parts like the forearm. This range ensures that the X-ray beam can penetrate through the forearm and produce a clear image.

The IP joints should be open for all views including the lateral.

The correct answer is 65-75. When a humerus is radiographed, a kVp range of 65-75 is used. This range of kVp ensures that the X-ray beam has enough energy to penetrate through the dense bone and produce a clear image. Using a lower kVp range may result in underexposure and a blurry image, while using a higher kVp range may cause overexposure and loss of detail in the image. Therefore, the optimal kVp range for radiographing a humerus is 65-75.

In upper extremity radiography, the long axis of the imaged part is aligned with the long axis of the collimation field. This means that the direction of the x-ray beam and the direction of the collimation field are both aligned with the longest dimension of the body part being imaged. This alignment helps to ensure that the entire length of the body part is captured in the image and that the collimation field is properly positioned to limit radiation exposure to the surrounding areas.

Flexing the fingers and hand for a lateral thumb projection naturally rotates the thumb into a lateral position. This positioning is important for obtaining a clear and accurate image of the thumb from a lateral perspective. By rotating the thumb laterally, any potential superimposition by the metacarpals is prevented, allowing for a better visualization of the thumb and any potential injuries or abnormalities.

Performing a PA oblique of the finger involves rotating the finger and hand in a specific direction. The question asks which type of rotation is usually easier for the patient. The correct answer is "external (lateral)". This means that rotating the finger and hand outward, away from the midline of the body, is typically easier for the patient when performing a PA oblique of the finger.

If the finger is not fully extended for a PA finger radiograph, it is likely that the MP and IP joint spaces will not be open. This means that the spaces between the metacarpophalangeal (MP) joints and the interphalangeal (IP) joints will not be visible on the radiograph. Additionally, the phalanx (finger bone) will be foreshortened, meaning that it will appear shorter than it actually is on the radiograph. Therefore, the correct answer is 1 and 3 only.

The correct answer is 55-65. This range of kilovoltage peak (kVp) is commonly used for wrist radiography. The kVp determines the energy level of the X-ray beam, and a higher kVp is needed to penetrate through the dense bone in the wrist. By using a kVp of 55-65, the X-ray can effectively capture the necessary details of the wrist bones while minimizing the risk of overexposure.

The kVp range for x-raying the thumb is 50-60. This range is chosen because it provides enough energy for the x-rays to penetrate the thumb and produce a clear image, while minimizing the risk of overexposure to radiation. Higher kVp values may result in excessive radiation exposure, while lower values may not provide sufficient penetration for a clear image. Therefore, the optimal range for x-raying the thumb is 50-60 kVp.

The kVp range for an oblique and/or lateral hand is 55-65. This range is chosen because it provides enough penetration to visualize the bones and soft tissues of the hand, while minimizing the risk of overexposure to radiation. Higher kVp settings may result in excessive scatter radiation and decreased image contrast, while lower settings may lead to underpenetration and poor image quality. Therefore, the 55-65 kVp range strikes a balance between image quality and patient safety.

The correct answer is 3 and 4 only. The 3rd and 4th digits of the hand usually require external rotation for a lateral projection when being radiographed. This is because external rotation helps to separate the fingers and provide a clear view of the bones and joints in the lateral aspect of these digits. External rotation helps to minimize overlap of structures and improve the diagnostic quality of the image.

The kVp range for an x-ray of a PA hand is typically 50-60. This range is chosen to ensure that the x-ray image has enough contrast to clearly visualize the bones and other structures in the hand. Higher kVp values can result in overexposure and loss of detail, while lower kVp values may result in underexposure and poor image quality. Therefore, the range of 50-60 kVp is considered optimal for obtaining a clear and accurate x-ray image of the PA hand.

The thumb keeps it from rotating laterally.

When the thumb is rotated away from the AP position, the amount of midshaft concavity increases on the side of the thumb toward which the POSTERIOR surface rotates.

The thumb prevents the hand from rotating laterally because it is positioned in a way that it overlaps with the fingers and provides stability. This prevents any lateral movement of the hand and therefore makes medial rotation the most common rotation error in an image of the PA finger.

The central ray for a radiograph of the thumb is positioned at the MP joint and perpendicular to the extended thumb. This positioning allows for optimal visualization of the thumb anatomy and any potential abnormalities or injuries.

During an AP projection of the thumb, neither side of the nail should be visible once the nail is placed against the IR. This is because the AP projection is taken perpendicular to the long axis of the thumb, which means that the nail should be parallel to the IR and not visible from either side.

The 2nd and 3rd digits usually require internal rotation for a lateral projection when being radiographed.

Placing the palmar surface flat on the image receptor will naturally place the thumb in a 45-degree lateral oblique position. This means that the thumb will be angled towards the side of the hand that is farthest from the body, at a 45-degree angle.

The correct answer suggests that the patient can maintain positioning support during an AP thumb exam by using their other hand to pull the medial palmar surface toward their body. This action helps stabilize the thumb and maintain proper positioning during the examination.

It is rotated from the PA position.

The kVp range for finger radiography is typically set between 50-60. This range is chosen to ensure adequate penetration of the X-ray beam while minimizing radiation dose to the patient. Higher kVp values may result in excessive scatter radiation and reduced image contrast, while lower kVp values may lead to insufficient penetration and underexposed images. Therefore, the optimal range of 50-60 kVp is commonly used for finger radiography.

The parts that have a normal kVp range of 55-65 are the oblique hand and the lateral hand.

To open the joint spaces in the finger of a patient who cannot extend the affected finger, performing an AP projection is necessary. This projection allows for a clear visualization of the joint space and any abnormalities present. Angle the tube caudad toward the joint at about 20 degrees, towards the distal end of the phalanx, and apply pressure until the finger is fully extended. This adjustment helps to separate the joint surfaces and improve the visibility of the joint space.

When x-raying a finger in the PA position, one half of the metacarpal should be included in the collimation field. This means that the x-ray should capture the entire length of the metacarpal bone up to the midpoint. Including one half of the metacarpal ensures that the entire bone is visible on the x-ray image, allowing for a more accurate assessment of any potential fractures or abnormalities.

The fingers are extended and kept PARALLEL to the IR to keep the joint spaces open.

Keeping the part PARALLEL to the IR keeps the joint space open and avoids foreshortening.

When the thumb is rotated away from the AP (anterior-posterior) position, the amount of midshaft concavity increases on the side of the thumb toward which the posterior surface rotates.