Mri Knee Atlas
Transcript of Mri Knee Atlas
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Sagittal three-dimensional (3D) spoiled GRE image of the knee obtained with fat
suppression.
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Normal articular cartilage at the patella (arrows), and adjacent joint fluid
(arrowhead) in a proton density weighted fast spin-echo axial image with fat-suppression.
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Segmentation
Top: Original baseline segmentation. Bottom: Tracked segmentation with contoursfrom baseline image mapped to follow-up image dataset.
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Detection of subchondral bone plate-cartilage interface changes in a one year observationalstudy. The baseline scan is registered to the follow-up visit, and a difference map is
generated displaying the location and magnitude of surface differences relative to a color
scale: the yellow-red regions indicates subchondral bone changes towards the cartilage,black indicates no change, and, light to dark blue represents changes towards the bone
marrow.
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Cartilage
Full-thickness cartilage defect ( ICRS Grade 3) at the posterior weight-bearing
surface of the lateral femoral condyle.
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Full-thickness cartilage defect (ICRS Grade 3) at the posterior weight-bearing surface
of the lateral femoral condyle.
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Cartilage defect. Sagittal 3D spoiled GRE image show a partial-thickness cartilagedefect in the medial femoral condyle (solid arrow). Note that fluid (dashed arrow) is
dark on the 3D spoiled GRE image.
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Sagittal T2-weighted fast SE: provides an outline of the defect on the T2-weighted fastSE image.
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FS 3D gradient-echo MRI is helpful for differentiating between grade 3and grade 4 cartilage defects.
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Marrow Abnormalities
Grade 1 BML lateral patellar facet and lateral trochlea.
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Grade 1 BML lateral tibial plateau.
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Grade 2 BML
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Axial PD image showing Bone marrow edema.
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Grade 3 BML
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Osteophytes
Sagittal 3D spoiled GRE image showing the osteophyte (arrow).
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Grade 1 anterior femoral trochlea osteophyte.
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Grade 1 medial tibial osteophyte.
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Grade 3 lateral femoral condyle osteophyte.
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Grade 3 patellar osteophyte.
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Subchondral Cyst
Grade 3 subchondral cyst.
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Grade 3 BML medial femoral condyle Grade 3 subchondral cysts
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MRI of bone edema and cyst formation
The three columns represent baseline, 6-month and 12-month follow-up images of a
knee.
The top row shows the gradual development of a subarticular cyst beneath abnormal
articular cartilage over the posterior surface of the lateral femoral condyle.
The middle row shows the development of the bone cyst during primarily the second 6-
month interval, and a focal defect in the overlying cartilage.
The bottom row shows extensive focal marrow edema at 6 months predicting the cyst
formation evident at 12 months.
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Menisci
Medial meniscal tear.
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Torn ACL
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Grade 2 Synovitis
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Grade 3 Synovitis