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Figure 4 | BMC Musculoskeletal Disorders

Figure 4

From: Semiquantitative assessment of subchondral bone marrow edema-like lesions and subchondral cysts of the knee at 3T MRI: A comparison between intermediate-weighted fat-suppressed spin echo and Dual Echo Steady State sequences

Figure 4

54-year old woman with knee osteoarthritis. a: Sagittal intermediate-weighted (IW) fat-suppressed (fs) image shows a large (grade 3) subchondral bone marrow edema-like lesion at the lateral femoral trochlea (white arrows). Within this lesion, there is a small subchondral cyst (grade 1) directly adjacent to the subchondral plate (black arrowhead). b: Corresponding sagittal Dual Echo Steady-State (DESS) image only shows the small cyst (white arrow). The large bone marrow edema-like lesion is not depicted by the DESS. Consequently, the margin of the cyst is more clearly delineated when compared to IW fs sequence.

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