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Figure 2

From: Diagnosis of ACL and meniscal injuries: MR imaging of knee flexion versus extension compared to arthroscopy

Figure 2

Normal ACL images obtained at knee extension (A), 30° of knee flexion (B) and 55° of knee flexion (C) on T2-weighted TSE FS sagittal image (2900/90). At extension (A) the ACL fibers are seen as linear, striate fibers extending from the roff of the femoral notch to the tibial surface. At 30° and 55° of flexion (B, C) a lengthening with astraing-like appearance of the ACL is seen. The posterior ACL, changes its appearance from an angular-konvex contour at extension (A), to a more straight like appearance with increased flexion angles (B, C).

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