✅ Knee MRI Mastery/Chap 2.ACL and PCL99 (Fig 2-D.07) Mimicking Cyclops Lesion, ACLR with Remnant Preservation, Stump Entrapment https://youtu.be/1_RsbGwIx4Qhttps://youtu.be/rbdodKV6lpE1️⃣ ACLR with Remnant Preservation: Cyclops-like Mass Lesions✅ Observations from ArthroscopyFindings: Compared to the standard technique, ACLR (Anterior Cruciate Ligament Reconstruction) involving remnant preservation observed more cyclops-like mass lesions.Clinical Impact: Despite the increased observation of these lesions, the.. 2024. 3. 9. (Fig 2-D.06) Cyclops Lesion Arthrofibrosis After ACL Reconstruction https://youtu.be/wL-ygDs7eBQhttps://youtu.be/rbdodKV6lpEArthrofibrosis After ACL Reconstruction1️⃣ Focal Form: Cyclops Lesion✅ Patients with arthrofibrosis following ACL reconstruction may present with stiffness or restricted extension, a symptom profile similar to that observed in cases of graft impingement.✅ MRI findingsIt is characterized by a nodule of low signal intensity locat.. 2024. 3. 9. (Fig 2-D.05) Restricted Range of Motion Caused by Tibial Tunnel Placement, Roof impingement https://youtu.be/AehMrA34A4Ihttps://youtu.be/rbdodKV6lpE1️⃣ Evaluating Tibial Tunnel Placement: The Amis and Jakob Line✅ The Amis and Jakob line is a commonly used reference to evaluate the anterior-posterior direction of the tibial tunnel. It passes through the widest part of the posterior corner of the medial tibial plateau, parallel to the medial joint line from the anterior (0%) to.. 2024. 3. 9. (Fig 2-D.04) Restricted Range of Motion Caused by Femoral Tunnel https://youtu.be/qrsWzi0BBxQhttps://youtu.be/rbdodKV6lpE1️⃣ Assessing Femoral Tunnel Placement ✅ The position of the femoral tunnel can be assessed in the sagittal plane by drawing a line along the posterior cortex of the femur and another line along the roof of the intercondylar notch. ✅ Ideal Tunnel Location: The inferior portion of the tunnel should be located at the intersection of.. 2024. 3. 9. (Fig 2-D.03) Sidewall impingement with ACL Graft tear https://youtu.be/X1iS_mw3fB0https://youtu.be/rbdodKV6lpE1️⃣ Side Wall ImpingementSidewall impingement with the intercondylar fossa is related to the shape of the fossa, graft size, and the presence of osteophytes.Coronal MR images show the graft indentation as it curves over the medial aspect of the lateral femoral condyle.This condition may be associated with the low positioning of .. 2024. 3. 9. (Fig 2-D.02) Sidewall impingement ACL reconstruction https://youtu.be/gxdkYD-ObaIhttps://youtu.be/rbdodKV6lpE1️⃣ Side Wall ImpingementSidewall impingement with the intercondylar fossa is related to the shape of the fossa, graft size, and the presence of osteophytes.Coronal MR images show the graft indentation as it curves over the medial aspect of the lateral femoral condyle.This condition may be associated with the low positioning of .. 2024. 3. 9. (Fig 2-D.01) Roof impingement https://youtu.be/1YkcVk8Dc34https://youtu.be/rbdodKV6lpE1️⃣ Graft Impingement OverviewGraft impingement is identified by the graft's repeated or constant friction against the intercondylar notch roof.Patients experiencing graft impingement often report a decrease in their range of motion, particularly in achieving full extension. This condition may increase the risk of graft tearing... 2024. 3. 9. (Fig 2-C.13) MRI Characteristics of Different Graft Type https://youtu.be/AfF9nLUkKco https://youtu.be/uDgqFi3itg0 1. Bone-Patellar-Tendon-Bone (BPTB) Autograft ✅ Early Postoperative Period (First Month) Signal Intensity: In the first month, BPTB autograft tendons typically show a low-intensity signal on both T1 and T2 sequences. This appearance is similar to the original patellar tendon, reflecting the relatively avascular nature of the donor structu.. 2024. 3. 3. (Fig 2-C.12) ACL Graft Ligamentization https://youtu.be/DEyDdD1Y62A https://youtu.be/uDgqFi3itg0 MR Postoperative Appearance of Reconstructed ACL 1️⃣ Initial Imaging After Surgery: The graft typically exhibits low to intermediate signal intensity due to its avascular nature. 2️⃣ Intermediate Stage (4 to 8 Months After Reconstruction): Within this timeframe, intermediate signal intensity is often observed within grafts. This signal in.. 2024. 3. 3. (Fig 2-C.10) Amis and Jacob’s method, ACL tibial tunnel https://youtu.be/SgpiUyyzRlY https://youtu.be/uDgqFi3itg0 1️⃣ Importance in Tibial Tunnel Placement The entire opening of the tibial tunnel must be located dorsally to the line drawn along the Blumensaat’s line. 2️⃣ Amis and Jakob's Line The Amis and Jakob line is one of the most commonly used methods to evaluate the anterior-posterior direction of the tibial tunnel. The Amis and Jakob’s line is.. 2024. 3. 2. (Fig 2-C.09) Graft coronal Inclination angle https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 1️⃣ Graft Coronial Inclination Angle The graft coronal inclination angle is a critical measurement in the assessment of the anterior cruciate ligament (ACL). Identify the Medial Edge of the Femoral ACL Attachment Scroll to the Medial Edge of the Tibial ACL Attachment Determine the Angle: The angle formed between the marked medial edge of .. 2024. 3. 2. (Fig 2-C.07) Bi-dimensional sagittal inclination https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 Bi-dimensional Sagittal Inclination of the ACL 1️⃣ Definition and Importance The sagittal angle is crucial in understanding the anterior cruciate ligament (ACL) dynamics. It is defined as the angle between the anterior margin of the ACL and a line perpendicular to the long axis of the tibia. This measurement is best obtained from a midlin.. 2024. 3. 2. (Fig 2-C.06) Bernard and Hertel’s grid-based technique https://youtu.be/fVe5J_01GsA https://youtu.be/uDgqFi3itg0 Ideal Graft Femoral Tunnel Center 1️⃣ Traditional Method on Conventional X-ray ✅ Assessment in the Sagittal Plane: The position of the femoral tunnel can be evaluated in the sagittal plane by drawing two specific lines: Posterior Cortex Line: A line along the posterior cortex of the femur. Roof Line: Another line along the roof of the int.. 2024. 3. 2. (Fig 2-C.05) Remnant preservation ACL reconstruction https://youtu.be/tzyZ4YJi3bM https://youtu.be/uDgqFi3itg0 ACL Reconstruction with Remnant Preservation 1️⃣ Advantages Faster Healing: Accelerates graft revascularization and remodeling. Improved Sensation: Preserves proprioceptive fibers Better Healing Environment: Enhances the biological setting for recovery. Stable Anchor Point: Maintains natural attachment at the tibia, supporting knee stabil.. 2024. 3. 2. (Fig 2-C.04) Hamstring tendon (HT) autograft https://youtu.be/Eki3acwjyuw https://youtu.be/uDgqFi3itg0 Hamstring Tendon (HT) Grafts Overview: The distal semitendinosus and gracilis tendons are common choices for HT autografts. Grafts are anchored using various surgical devices such as interference screws, endobuttons, and staples. Healing Process: Healing of soft tissue grafts involves progressive mineralization of the fibrovascular interf.. 2024. 3. 2. (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -2 https://mskmri.tistory.com/800 (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -1 https://youtu.be/c3xVsxRqhjQ Bone-Patellar Tendon-Bone (BPTB) Autograft 1️⃣ Optimal Patient Age: Less than 35 years old Engaged in high-level pivoting sports with high physical demand 2️⃣ Advantages Bone-to-bone healing potentially leads to more ag mskmri.tistory.com https://youtu.be/ucPGY9r0cv8 https://you.. 2024. 3. 2. (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -1 https://youtu.be/ucPGY9r0cv8 https://youtu.be/uDgqFi3itg0 Bone-Patellar Tendon-Bone (BPTB) Autograft 1️⃣ Optimal Patient Age: Less than 35 years old Engaged in high-level pivoting sports with high physical demand 2️⃣ Advantages Bone-to-bone healing potentially leads to more aggressive rehabilitation Low graft rupture rates comparable to quadruple hamstring tendon (QT) grafts High return to sport.. 2024. 3. 2. (Fig 2-C.01) ACL Repair https://youtu.be/J2AaFUMYp2g https://youtu.be/uDgqFi3itg0 ✅ ACL Repair Techniques 1️⃣ Primary ACL Repair Success Criteria: Primary repair is most effective when an avulsion occurs at the ACL's femoral or tibial attachment points. Bony Avulsion Treatment: Bony avulsion of the distal ACL can be treated successfully with direct bone-to-bone fixation. Mid-Substance Tears: Primary repairs for mid-sub.. 2024. 3. 1. (Fig 2-B.31) Ramp lesion versus no ramp lesion in ACL injury https://youtu.be/zefgdfakDLM https://youtu.be/8yHOp_whDZU 1️⃣ Meniscal Ramp Lesion Ramp lesions refer to injuries affecting the posterior horn of the medial meniscus in the setting of ACL tears. A high signal at the meniscocapsular junction without a frank fluid cleft indicates a sprain rather than a true separation. 2️⃣ False Positive Ramp Lesions Edema affecting the posterior capsule reflects .. 2024. 2. 29. (Fig 2-B.29) Segond fracture in ACL injury https://youtu.be/qMzfbQTmWmw https://youtu.be/8yHOp_whDZU ✅ Segond Fracture 1️⃣ Segond Fracture and Associated Injuries Associated Findings: Segond fractures are linked to ACL tears, MCL tears, medial meniscus tears, and posterolateral corner injuries. Indicator of ALRI: Recognized as a marker for anterolateral rotatory instability (ALRI) and a predictor of severe ligamentous injury, particularl.. 2024. 2. 29. (Fig 2-B.28) Avulsion fractures of the fibular head (arcuate sign) https://youtu.be/lyIcSFDWbc0 https://youtu.be/8yHOp_whDZU ✅Avulsion fractures of the fibular head (arcuate sign) Avulsion fractures of the fibular head, also known as the arcuate sign, are significant yet often not found in isolation. These fractures typically occur alongside high-grade injuries to the Posterolateral Corner (PLC) of the knee, commonly accompanied by tears in the cruciate ligamen.. 2024. 2. 26. 이전 1 2 3 4 5 다음
