✅ Knee MRI Mastery/Chap 2.ACL and PCL99 (Fig 2-B.06) fluid between torn ACL and lateral femoral condyle sidewall -2_axial https://youtu.be/uZcLajjTEOc https://youtu.be/8yHOp_whDZU ✅ Fluid between torn ACL and lateral femoral condyle sidewall_axial image Diagnosing a proximal ACL tear can sometimes be difficult and may occasionally be missed. The normal ACL has an elliptical homogeneous low signal intensity appearance on axial images through the proximal intercondylar notch. In cases of an ACL tear at the femoral .. 2024. 2. 20. (Fig 2-B.05) fluid between torn ACL and lateral femoral condyle sidewall -1_coronal https://youtu.be/c4fcT321i9Y https://youtu.be/8yHOp_whDZU ✅ Fluid between torn ACL and lateral femoral condyle sidewall_coronal image Diagnosing a proximal ACL tear can sometimes be difficult and may occasionally be missed. In cases of an ACL tear at its femoral attachment, high signal intensity within the ACL and the presence of fluid between the torn ACL and the lateral femoral condyle are ide.. 2024. 2. 20. (Fig 2-B.04) Empty notch sign https://youtu.be/WHDY3iC__jk https://youtu.be/8yHOp_whDZU ✔️Empty notch sign The "Empty Notch Sign" is an indicator of an ACL tear or avulsion at its femoral attachment. This sign is identified by a fluid signal at the usual ACL attachment site within the intercondylar notch on axial and coronal fluid-sensitive MRI scans. It emphasizes the importance of thoroughly inspecting the ACL attachments,.. 2024. 2. 19. (Fig 2-B.02) Risk factors for ACL injuries increased slope of the tibial plateau. https://youtu.be/8yHOp_whDZU Research suggests that a combination of an increased posterior-directed slope of the tibial plateau and a shallow medial tibial plateau depth significantly contributes to the risk of anterior cruciate ligament (ACL) injuries. To accurately measure the slope of the tibial plateau, the procedure involves determining the angle between a line that connects the peak point.. 2024. 2. 17. (Fig 2-B.01) Risk factors for ACL injuries notch width index https://youtu.be/GoxPgCqCQ9w https://youtu.be/8yHOp_whDZU Numerous studies have identified the tibial slope and a narrow intercondylar notch width as significant risk factors for ACL injuries. However, contrasting findings exist, with some research suggesting that notch width does not significantly impact ACL injury risk. The Notch Width Index (NWI) serves as a critical measure in this context, .. 2024. 2. 17. (Fig 2-A.12) Pitfalls, Anterior Meniscofemoral Ligament of the Medial Meniscus, Infrapatellar Plica https://youtu.be/YxbG8JYUN74 https://youtu.be/-pVlqbzsZxg Comparison of Anteromedial Meniscofemoral Ligament and Ligamentum Mucosum 1️⃣ Anteromedial Meniscofemoral Ligament (AMML): Definition: An uncommon accessory ligament that extends from the anterior horn of the medial meniscus, running parallel to the Anterior Cruciate Ligament (ACL), to insert into the medial wall of the lateral femoral co.. 2024. 2. 17. (Fig 2-A.11) Complete tear versus mucoid degeneration of the ACL. https://youtu.be/qejRh9wa2DM https://youtu.be/-pVlqbzsZxg ★ Mucoid degeneration Mucoid degeneration of the anterior cruciate ligament (ACL) presents a diagnostic challenge that could lead to misinterpretation as partial ruptures if not accurately recognized. Key indicators include: Celery Stalk Appearance: This unique pattern is a hallmark of mucoid degeneration Ganglion Cysts: The presence of g.. 2024. 2. 17. (Fig 2-A.10) Mucinous or mucoid degeneration of the ACL https://youtu.be/Etr-glkoGTs https://youtu.be/-pVlqbzsZxg ★ Mucinous or Mucoid Degeneration of the ACL 1️⃣ Characteristics: The ACL exhibits a diffuse increase in signal and thickness, with normally oriented intact fibers displaying regular striations. 2️⃣ Appearance: Noted for its “Celery stalk" appearance, characterized by mucoid degeneration and fusiform enlargement. 3️⃣ Coexistence: Mucinous.. 2024. 2. 16. (Fig 2-A.09) Cruciate or Intercondylar notch cysts, ACL ganglion cyst https://youtu.be/AwUp7jM9lsU https://youtu.be/-pVlqbzsZxg ★ Cruciate or Intercondylar Notch Cysts ★ 1️⃣ Definition: Intercondylar notch or ganglion cysts of the ACL, also known as cruciate cysts, are pathological formations that can arise both on the surface and within the Anterior Cruciate Ligament (ACL) substance. 2️⃣ Location: These cysts are typically found in the middle and proximal portion.. 2024. 2. 16. (Fig 2-A.07) Normal ACL on oblique coronal images https://youtu.be/w9haLLZWar0 https://youtu.be/-pVlqbzsZxg Normal ACL Visualization on Oblique Coronal Images Oblique coronal imaging techniques, specifically tailored to align with the longitudinal axis of the Anterior Cruciate Ligament (ACL) or the roof of the intercondylar notch, play a crucial role in the depiction of the different components of the ACL and allow for complete visualization of.. 2024. 2. 16. (Fig 2-A.06) Normal ACL on axial images https://youtu.be/HwgCgXZ6enY https://youtu.be/-pVlqbzsZxg Normal ACL on axial images The ACL is distinguished by its unique structural features and attachments, which are critical for its function in stabilizing the knee joint. ✅ On axial MRI images, the ACL can be observed with distinct characteristics at different segments: Anteromedial (AM) Bundle: This portion of the ACL attaches to the prox.. 2024. 2. 16. (Fig 2-A.04) Normal ACL on coronal images, anteromedial and posterolateral bundles of ACL https://youtu.be/zqqdk2aXJr4 https://youtu.be/-pVlqbzsZxg ★ ACL Assessment on Coronal Images ★ Increased Accuracy: Utilizing the coronal plane for assessing the Anterior Cruciate Ligament (ACL) proves to be more accurate than the sagittal plane, aiding in the distinction between partial and complete ACL tears. 📌 Key Observations: 1️⃣ Abnormal ACL Indicators: On T1- or PD-weighted coronal images,.. 2024. 2. 16. (Fig 2-A.03) Normal ACL on Sagittal images https://youtu.be/wLRzVaAqPKE https://youtu.be/-pVlqbzsZxg Normal ACL on Sagittal Images Signal Intensity: The normal Anterior Cruciate Ligament (ACL) exhibits low signal intensity on both T1- and T2-weighted MRI sequences. Heterogeneous striations, which are commonly observed, are usually due to the presence of fat and synovium, especially at the tibial attachment. Sagittal MR Images with Extend.. 2024. 2. 16. (Fig 2-A.02) Tibial attachment of the ACL, ACL footprint https://youtu.be/ud0eSaDAcJQ https://youtu.be/-pVlqbzsZxg ★ ACL Tibial Landmarks ★ 1️⃣ ACL Tibial Attachment The ACL's Anteromedial (AM) bundle footprint presents a convex, comma-shaped appearance at the tibial attachment. This shape encompasses the anterior, convex contour of the Posterolateral (PL) bundle, connecting anterolaterally (via the tail of the comma) and anteromedially (via the head .. 2024. 2. 16. (Fig 2-A.01) Surgical Anatomy of ACL and Associated Ridges https://youtu.be/85Mve7NPDdY https://youtu.be/-pVlqbzsZxg ★ Surgical anatomical structures related to the ACL ★ 1️⃣ Lateral Intercondylar Ridge: This structure is found anterior to the ACL femoral footprint, with an average length of 18.0 mm. It stretches from the femoral articular cartilage margin to the roof of the intercondylar notch. 2️⃣ Lateral Bifurcate Ridge: Situated between the AM (ante.. 2024. 2. 15. 이전 1 2 3 4 5 다음
