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Citation, DOI & article data
Citation:
Bilodeau, L., Murphy, A. Knee (Rosenberg view). Reference article, Radiopaedia.org. (accessed on 09 Oct 2022) //doi.org/10.53347/rID-57757
The Rosenberg view of the knees is a specialized series often used to detect early signs of osteoarthritis. It should be the initial study for any patient with a suspicion of knee osteoarthritis.
On this page:
The Rosenberg view is performed for any patient with a suspicion of knee osteoarthritis. It consists of a PA radiograph with weight-bearing and 45 degrees of knee flexion. It is more sensitive than standard weight-bearing radiographs for the detection of joint space narrowing 1.
- the patient is erect facing the upright detector with knees slightly bent to around 45 degrees
- posteroanterior projection
- centering point
- central ray is angle 10-20 degrees caudad at the level of the knee joint typically 1.5 cm distal to the apex of the patella
- collimation (bilateral)
- superior to include both distal femurs
- inferior to include the proximal tibia/fibula
- lateral to include both knees skin margin
- orientation
- landscape
- detector size
- 35 cm x 30 cm
- exposure
- 60-70 kVp
- 7-10 mAs
- SID
- 100 cm
- grid
- no
- tibial plateau should be free from any superimposition
- femoral condyles should be free from superimposition with the intercondylar fossa in profile, giving the appearance of a 'notch'
Patients whom must have this examination performed will have trouble maintaining this position, due to the knee problems they are investigating. Ensure clear demonstrating and instruction is given to the patient before position, and, on completion, the patient is made aware so they can get in a more comfortable position.
An alternate view is the Schuss view, which differs from a flexion angle of 30 degrees.
History and etymology
The Rosenberg view was described by the American orthopedic surgeon Thomas D Rosenberg (fl. 2021), who works in Utah, in 1988 2.
References
Related articles: Imaging in practice
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Citation, DOI & article data
Citation:
Murphy, A. Knee (AP weight-bearing view). Reference article, Radiopaedia.org. (accessed on 09 Oct 2022) //doi.org/10.53347/rID-48353
The knee AP weight-bearing view is a specialized projection to assess the knee joint, distal femur, proximal tibia and fibula and the patella.
On this page:
Knee AP weight-bearing views will often be used in the context of orthopedic appointments to assess the alignment and degree of arthropathy when weight-bearing. This view is often used to assess osteoarthritis as non-weight bearing views can underestimate the degree of joint space loss. It is common for the AP view to include both knees so to use the contralateral side as a comparison.
- the patient is erect against the upright detector with the knee and ankle joint in contact with the detector
- leg is extended
- ensure the knee is not rotated
- anteroposterior projection
- centering point
- center of the knee 1.5 cm distal to the apex of the patella
- collimation
- superior to include the distal femur
- inferior to include the proximal tibia/fibula
- lateral to include the skin margin
- medial to include medial skin margin
- orientation
- portrait
- detector size
- 24 cm x 30 cm
- exposure
- 60-70 kVp
- 7-10 mAs
- SID
- 100 cm
- grid
- no
The femoral and tibial condyles should be symmetrical, the head of the fibula is slightly superimposed bit the lateral tibial condyle. The patella is resting on the superior portion of the image superimposing the distal femur.
The fibula head is a great indication of rotation, if the fibula head is entirely superimposed, the image is not AP; to correct this you must internally rotate until the knee is in even contact wit the image detector.
Very slim patients may require a slight caudal angle to better visualize the joint space in an AP fashion. The opposite applies for larger patients (larger thighs mean the leg may be naturally flexed at rest), requiring a slight cephalic angle. Both angles roughly 5-8 degrees.