What is the name of the deep depression found on the posterior aspect of the distal femur?
A line drawn across the most distal aspect of the medial and lateral femoral condyles would be ______from being at a right angle to the long axis of the femur.
Which 2 ligaments of the knee joint help stabilize the knee from the anterior and posterior perspective?
What condition may cause the tibial tuberosity to be pulled away from the tibial shaft?
What condition may produce the radiographic appearance of a destructive lesion w/ irregular periosteal reaction?
Which imaginary plane should be placed parallel to the IR for an AP projection of the knee?
Which joint space should be open or almost open for a well positioned AP oblique knee projection w/ medial rotation?
True/False: A 5-7 degree cephalad angle of the central ray for a lateral projection of the knee helps superimpose the distal borders of the medial & lateral condyles of the femur.
SITUATION: A projection is performed for the patellofemoral joint w/ the patient supine and the knee flexed 40. The CR is angled 30 caudad from horizontal. The cassette is resting on the lower legs supported by a special device. Which method is being described?
SITUATION: A radiograph of the knee reveals the joint spaces are not equally open & the proximal fibula is superimposed over the tibia. What positioning error lead to this?
lateral rotation of lower limb
SITUATION: A bilateral patellofemoral joint space study is ordered. The patient is parapelgic. What projection is best suited?
Superoinferior (sitting) tangential
What is the large prominence located on the midanterior surface of the proximal tibia that serves as a distal attachment for the patellar tendon?
What is the small prominence located on the posterolateral aspect of the medial condyle of the femur that is a landmark to determine possible rotation of lateral knee?
A small triangular depression located on the tibia that helps form the distal tibiofibular joint is called
What are 2 other names for the patellar surface of the femur?
intercondylar sulcus, trochlear groove
What is the name of the depression located on the posterior aspect of the distal femur?
intercondylar fossa or notch
Why is the CR angled 5-7* cephalad for a lateral knee?
medial condyle lower than lateral condyle causing the 2 condyles to be superimposed when femur is parallel to IR
The slightly raised area located on the posterolateral aspect of the medial femoral condyle is the
True/False: Flexion of 20* of the knee forces the patella firmly against the patellar surface of the femur.
True/False: The patella acts like a pivot to increase the leverage of a large muscle found in the anterior thigh.
Which large muscle does the patella serve as a pivot to increase the leverage?
quadriceps femoris muscle
The crescent shaped fibrocartilage disks that act as shock absorbers in the knee joint are called
medial & lateral menisci
To include both joints for a lateral projection of tibia & fibula, the tech can place IR ____ to part.
What projection of knee best demonstrates the proximal tibiofibular joint & the proximal fibula w/ no superimposition?
AP oblique 45* medial rotation
For the AP oblique of the knee, the ____ rotation best shows the lateral condyle of the tibia & the head/neck of the fibula.
Which positioning error is present if the DISTAL borders of the femoral condyles are not superimposed on a lateral knee?
improper angle of CR
Which positioning error is present if the POSTERIOR portions of the femoral condyles are not superimposed on a lateral knee?
overrotation or underrotation of knee
What type of CR angulation & how much flexion is required for PA axial weight-bearing projection (Rosenberg)?
For a tangential projection of the femoropatellar joint, how much flexion should be on the knee?
The knee joint is highly dependent on two important pairs of major ligaments for stability called:
anterior/posterior cruciate (ACL, PCL) & lateral/medial collateral (LCL, MCL) ligaments
A saclike structure that is filled w/ a lubricating-type synovial fluid that the knee joint is enclosed in is called _____ or _____.
articular capsule, bursa
The femoral shaft is at an angle of ____ degrees for an average adult and the range is __-__degrees.