Podcast
Questions and Answers
What is the minimum recommended SID (Source-to-Image Distance) in inches for an AP knee projection?
What is the minimum recommended SID (Source-to-Image Distance) in inches for an AP knee projection?
- 48 inches
- 72 inches
- 40 inches (correct)
- 36 inches
A radiographer is performing an AP knee projection on a patient. What is the MOST appropriate field size to use for this examination?
A radiographer is performing an AP knee projection on a patient. What is the MOST appropriate field size to use for this examination?
- 10 × 12 inches (24 × 30 cm), portrait (correct)
- 8 × 10 inches (20 × 25 cm), landscape
- 12 × 14 inches (30 × 35 cm), portrait
- 14 × 17 inches (35 × 43 cm), landscape
A patient presents with suspected fractures, lesions, and bony changes, which radiographic projection is BEST suited to visualize these conditions in the distal femur, proximal tibia and fibula, patella, and knee joint?
A patient presents with suspected fractures, lesions, and bony changes, which radiographic projection is BEST suited to visualize these conditions in the distal femur, proximal tibia and fibula, patella, and knee joint?
- Tangential Projection
- Axial Projection
- Lateral Decubitus
- AP Projection (correct)
When should the Bucky grid be used for a knee radiograph?
When should the Bucky grid be used for a knee radiograph?
In addition to the AP projection, which other projections are typically included in a routine knee series to provide a comprehensive evaluation?
In addition to the AP projection, which other projections are typically included in a routine knee series to provide a comprehensive evaluation?
Flashcards
AP Projection of the Knee
AP Projection of the Knee
The frontal view of the knee taken with the patient standing or seated, showing the knee joint.
Clinical Indications for Knee X-ray
Clinical Indications for Knee X-ray
Used to identify fractures, lesions, or degenerative changes in knee bones and joints.
Minimum SID for Knee X-ray
Minimum SID for Knee X-ray
Standard minimum source-to-image distance required for accurate knee imaging is 40 inches (100 cm).
Recommended Field Size for Knee X-ray
Recommended Field Size for Knee X-ray
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Grid vs. Nongrid X-ray Techniques
Grid vs. Nongrid X-ray Techniques
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Study Notes
Knee AP Projection
- Purpose: Diagnosing fractures, lesions, or bony changes in the distal femur, proximal tibia and fibula, patella, and knee joint, often related to osteoarthritis.
- Routine Projections: Includes AP, medial oblique, lateral oblique, and lateral views.
- Image Acquisition: Requires a minimum source-to-image distance (SID) of 40 inches (100 cm).
- Recommended Field Size: A 10 x 12 inch (24 x 30 cm) portrait format is recommended.
- Technical Considerations: Use a grid or bucky system with a minimum of 4-inch (10-cm) grid distance. For a tabletop projection without a grid, a 4-inch (10-cm) distance is also needed, but the text repeats this.
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Description
This lesson covers the anterior-posterior (AP) projection of the knee. It discusses the purpose of this projection, which includes diagnosing fractures, lesions, and osteoarthritis-related bony changes. Technical considerations such as SID, field size, and grid usage are also detailed.
