Podcast
Questions and Answers
In the AP position of the knee joint, the leg should be posed in external rotation of around 5 degrees.
In the AP position of the knee joint, the leg should be posed in external rotation of around 5 degrees.
False
The central ray for the knee joint x-ray should be projected perpendicularly toward 2 cm below the tip of patella.
The central ray for the knee joint x-ray should be projected perpendicularly toward 2 cm below the tip of patella.
False
In the lateral knee joint position, the opposite leg of filming knee should be placed at 30-35 degrees.
In the lateral knee joint position, the opposite leg of filming knee should be placed at 30-35 degrees.
False
The patella should not be shown overlap above the femur shadow in the AP position.
The patella should not be shown overlap above the femur shadow in the AP position.
Signup and view all the answers
The IR size for the knee joint x-ray is 9*11 inches.
The IR size for the knee joint x-ray is 9*11 inches.
Signup and view all the answers
The knee joint should be shown in stack in the AP position.
The knee joint should be shown in stack in the AP position.
Signup and view all the answers
In the Skyline view, the patient can be placed in lateral decubitus position.
In the Skyline view, the patient can be placed in lateral decubitus position.
Signup and view all the answers
The patellofemoral joint cavity should not show clearly without overlapping in the Skyline view.
The patellofemoral joint cavity should not show clearly without overlapping in the Skyline view.
Signup and view all the answers
Study Notes
Knee Joint Positions
- AP Position:
- Patient can be in supine or sitting position
- Leg is positioned with internal rotation of around 5 degrees
- Axis of leg and knee should match vertical axis of image receptor (IR)
- Region:
- Knee joint, proximal tibia, proximal fibula, and distal femur are included
- Pathology:
- Ligament injury, fracture, chondromalacia, degenerative joint disease, and arthritis of knee joint can be detected
AP Position (continued)
- IR size: 8*10 inch
- SID: 100 cm
- Central ray: projects perpendicularly toward 1 cm below the tip of patella
- Respiration: unrelated
- Collimation: includes distal portion of femur, tibia, and proximal portion of fibula
- Evaluation:
- Knee joint should not be shown in a stacked position
- Medial portion of head of fibula should overlap tibia
- Patella should overlap above femur shadow
Lateral Knee Joint Position
- Patient is placed in lateral decubitus position
- Opposite leg is placed 15-20 degrees away from filming knee
- Bilateral condyles of femur are perpendicular to IR
- Evaluation:
- Patella should appear in true lateral position
- Patellofemoral joint should be open without overlapping
- Collimation: includes distal portion of femur, tibia, and proximal portion of fibula
Skyline View (Patella)
- Patient can be in prone or sitting position
- Image receptor (IR) is placed underneath the knee with 90-degree flexion
- Evaluation:
- Patellofemoral joint cavity should be clearly visible without overlapping
- Patella should be shown in half-side image
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the positions and techniques used in radiography of the knee joint, including the AP position and the regions and pathologies that can be detected.
