Knee-deep in Trouble
Joint Effort: The Knee Edition
Knee-d for Speed
Knee-d for Knowledge
Meniscus Mayhem
100
For this projection, the leg is rotated until the femoral condyles are superimposed.
What is the lateral projection of the tibia and fibula?
100
This amount of internal (medial) rotation is required to place the femoral condyles parallel to the IR for an AP knee.
What is 3–5 degrees medial rotation?
100
This is the correct central ray angle for an average AP knee.
What is 0 degrees?
100
This central ray location is used for the AP knee.
What is 1/2 inch distal to the apex of the patella?
100
This is the correct degree of knee flexion for a lateral knee.
What is 20–30 degrees of flexion?
200
This CR angle is used when the femoral condyles are not superimposed due to patient body habitus on a lateral knee.
What is 5–7 degrees cephalad?
200
This method requires the patient to kneel and lean forward over the IR.
What is the Holmblad method?
200
This method uses a 40–50 degree knee flexion with a perpendicular CR.
What is the Camp-Coventry method?
200
This is the correct degree of knee flexion for the Merchant method.
What is approximately 40 degrees?
200
This CR angle is used for the Merchant method.
What is 30 degrees caudad from horizontal?
300
This must be included on all long bone images.
What are both adjacent joints?
300
A trauma patient cannot be rolled for a mediolateral knee. This projection should be performed instead.
What is a cross-table lateral (horizontal beam) knee?
300
A lateral knee shows non-superimposed posterior femoral condyles. This CR adjustment will correct it.
What is angling the CR 5–7 degrees cephalad?
300
A trauma patient requires a lateral tib/fib without movement. This projection is indicated.
What is a cross-table lateral tibia/fibula?
300
A patient cannot kneel for a Holmblad method. This alternative method should be used.
What is the Camp-Coventry method?
400
A patient with a large thigh demonstrates closed joint spaces on the AP knee. This CR adjustment is required.
What is angling the CR 5 degrees cephalad?
400
An AP knee image shows excessive superimposition of the fibular head by the tibia. This correction is needed.
What is decreasing medial rotation of the leg?
400
A tunnel view shows a closed intercondylar fossa. This is the most likely cause.
What is insufficient knee flexion or incorrect CR angulation?
400
A patient with suspected patellar subluxation requires this projection.
What is a tangential (sunrise/skyline) projection?
400
Inflammation of the bone and cartilage of the anterior proximal tibia and is most common in boys 10 to 15 years old.
What is Osgood-Schlatter disease?
500
The crescent-shaped fibrocartilage disks or pads that lie on the tibial plateaus.
What are the menisci?
500
The method demonstrated in the figure below:
What is the Camp-Conventry method?
500
This is projection best demonstrates the narrowing of the femorotibial joint spaces of the knees.
What is AP weight bearing bilateral knee projection?
500
Another term for intercondylar sulcus.
What is patellar surface?
500
Projection of the knee that best demonstrates the neck of the fibula without superimposition of the tibia.
What is AP oblique with medial rotation?