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What is the primary issue with the radiograph in the example?
What modification would be beneficial to show the joint in this patient?
What is the significance of the arrow in the radiograph example?
What is the main goal of modifying the central ray in this case?
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What is the primary advantage of using the Long-Rafert or Lewis modification?
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What is the name of the method used for the AP Oblique Projection?
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In which direction is the wrist positioned for the PA Axial Projection using the Rafert-Long method?
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What is the name of the series used for the PA and PA Axial wrist projections?
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What is the type of projection used for the Stecher Method?
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What is the name of the bone being projected in the given images?
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What is the primary purpose of adjusting the central ray angle in the radiographic examination of the wrist?
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What is the primary difference between radiographs (A) and (B)?
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What is the primary purpose of the Folio method in radiology?
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What is the purpose of using a 10-degree cephalad angle in radiograph (B)?
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What is the significance of the 13-degree difference in the MCP joint angle between the left and right sides?
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What is the significance of the radiographs being from the same patient?
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What is the primary advantage of using a PA axial view in radiograph (B)?
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What is the purpose of the PA Oblique projection in hand radiology?
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What is the importance of the marker on the radiograph?
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What is the significance of the metacarpal index in hand radiology?
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What is the role of the flexible strip in the Folio method?
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What is the purpose of the Lateral projection in hand radiology?
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What is the significance of the 20-degree angle measurement in the UCL tear?
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What is the importance of the hand position in the PA projection?
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What is the role of the radiographic markers in the evaluation of hand anatomy?
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What is the name of the projection method used to visualize the carpal canal?
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What is the orientation of the central ray in a tangential carpal canal projection?
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What is the purpose of modifying the central ray in a carpal canal projection?
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What is the name of the anatomical structure visualized in a tangential carpal canal projection?
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What is the benefit of using a tangential projection for the carpal canal?
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Study Notes
Radiograph Projections
- A typical repeat radiograph may obscure the first CMC joint, which can be improved by using the Long-Rafert or Lewis modification of the central ray.
Axial CT Scan
- An axial CT scan through the distal carpals can help well visualize the CMC joint.
Folio Method
- The Folio method is used to diagnose a tear in the ulnar collateral ligament (UCL) of the first metacarpophalangeal (MCP) joint, also known as "skier's thumb".
- Key points to note in this projection include:
- Evidence of proper alignment and the presence of a marker without anatomy.
- The hand in a PA projection without rotation.
- The first metacarpal and first MCP joint.
- The ulnar side of the wrist and the soft tissues around it.
- The thumb in the center of the image.
- Trabecular bone details and surrounding soft tissues.
Hand PA Projection
- Evaluation criteria for a hand PA projection include:
- Evidence of proper alignment and the presence of a marker without anatomy.
- Anatomy from the fingertips to the distal radius and ulna.
- Fingers slightly separated without soft tissue overlap.
- No hand rotation.
- The MCP and IP joints are open, indicating that the hand is placed on the receiver flat.
- Trabecular bone details and surrounding soft tissues.
PA Oblique Projection
- No specific details mentioned.
Lateral Projection
- No specific details mentioned.
Lateromedial in Flexion
- No specific details mentioned.
AP Oblique Projection (Norgaard Method)
- No specific details mentioned.
Scaphoid PA Axial Projection (Stecher Method)
- No specific details mentioned.
Rafert-Long Method Scaphoid Series
- PA and PA axial wrist in ulnar deviation are used in this series.
- Radiographs are all from the same patient.
Carpal Bridge Tangential Projection
- No specific details mentioned.
Carpal Canal Tangential Projection (Gaynor-Hart Method)
- No specific details mentioned.
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Description
This quiz is about radiography techniques, specifically the use of Long-Rafert or Lewis modification to visualize the first CMC joint on a radiograph.