The semitendinosus tendon can be seen immediately posterior to the semimembranosus muscle. The fclbiceps femoris bursa is found lateral to the distal fcl, and insinuates anterior and anteromedial in relation to this ligament. Clinical features and management rotatory instability of the posterolateral corner of the knee is a complex and difficult clinical entity in terms of both diagnosis and treatment. Knowing major anatomical variations and technical artifact that may false images of meniscal and ligamentous injuries. Background meniscal tears of the knee are a common injury with mri being a well established and highly accurate imaging modality in its detection and evaluation 1,2. The written or electronic request for mri of the knee should provide sufficient information to demonstrate the. The presence of two mri findings concomitantly correlates with painful oa of the knee. Functionally, the knee comprises 2 articulationsthe patellofemoral and tibiofemoral. Normal anatomy and biomechanics of the knee fred flandry, md, facsw and gabriel hommel, md abstract. Common indications include assessment of internal derangement, pain, and further investigation of a radiographic abnormality.
The knee joint is a modified hinge joint between the femur, tibia and patella. Click on a link to get t1 coronal view t2fatsat axial view t2fatsat coronal view. Normal mri anatomy of the knee key points the semimembranosus muscle is the largest of the posteromedial muscles continuing inferiorly to this level. However, mri of the knee has a diagnostic role in patients with joint pain and symptoms such as locking, popping, or instability that suggest meniscal or ligamentous damage. This section of the website will explain how to plan for an mri knee scans, protocols for mri knee, how to position for mri knee and indications for mri knee. However, a variety of potential pitfalls in interpretation of abnormalities related to the knee have been identified, particularly in evaluation of the menisci, ligaments, and articular cartilage. Mri of the knee is highly accurate in evaluation of internal derangements of the knee. The physician performing the mri interpretation must have a clear understanding and knowledge of the anatomy and pathophysiology relevant to the mri examination. Superiorly, it extends to the level of the crossing of the biceps. This mri brain crosssectional anatomy tool serves as a reference atlas to guide radiologists and researchers in the accurate identification of the brain structures. A guide to evaluation and reporting is a wellwritten, uptodate book covering all imaging aspects of magnetic resonance mr imaging of the knee joint. Use the mouse scroll wheel to move the images up and down alternatively use the tiny arrows on both side of the image to move the images. Ho bachelor of medicine, bachelor of surgery university of hong kong fellow, hong kong college of radiologists fellow, hong kong academy of medicine radiology realtime interface human sectional anatomy. Click on a link to get t1 coronal view t2fatsat axial view t2fatsat coronal view t2fatsat sagittal view.
Magnetic resonance imaging is particularly well suited for the medical evaluation of the musculoskeletal msk system including the knee, shoulder, ankle, wrist and elbow. Stability of the joint is governed by a combination of static ligaments, dynamic muscular forces, meniscocapsular aponeurosis, bony topography, and joint load. The extensor mechanism consists of the quadriceps muscle and tendon, patella, patellar tendon, and patellar retinacula. Mri knee protocols and planning indications for mri knee. The knee is the joint most commonly imaged with mri in the pediatric population. There is a wide variety of variant vascular anatomy and vascular pathology that can occur around the knee, including an aberrant anterior tibial artery, vascular trauma that occurs with knee dislocation, popliteal artery entrapment syndrome, popliteal artery aneurysm, popliteal vein thrombosis, cystic adventitial. To evaluate effectively an mri examination of a particular joint or region in the musculoskeletal system, it is essential to have at least a basic understanding of the normal mri anatomy of that region. It is typically used to help diagnose or evaluate pain, weakness, swelling or bleeding in and around the joint. The inferior lateral genicular artery courses between the fcl and the popliteus tendon. It is the largest synovial joint in the body and allows flexion and extension of the leg as well as some rotation in the flexed position. M internal rotation quadriceps all extension unclassi. The stability of the posterolateral corner of the knee is provided by.
Welcome to the hitachi medical systems america, inc. Several types of lesions may be expected to be observed in knee oa by mri imaging. The smaller sartorius muscle is seen more medially with the gracilis tendon interposed. Normal radiographic anatomy of the knee radiology case. The test helps your doctor visualize the anatomy of your knee to determine the possible cause of your. Knee pathology meniscal pathology ligament injury cartilage lesions bony and tendinous lesions. This mri knee sagittal cross sectional anatomy tool is absolutely free to use. An easily accessible multimedia program for teaching cross section mri anatomy of the knee in lecture style, enhanced by narration and supporting text in addition. This mri brain cross sectional anatomy tool is absolutely free to use. Many static and dynamic internal derangements of the patellofemoral joint in these patients lead to various secondary mri findings.
This page presents a comprehensive series of labeled axial, sagittal and coronal images from a normal human brain magnetic resonance imaging exam. Mri anatomy and anatomical variations of the knee semantic scholar. Magnetic resonance imaging of the knee dr benjamin domb. Normal anatomy of the knee ligaments, pathologic conditions, and postsurgical appearances of the anterior cruci. Medial collateral ligament partially torn in this patient l. It is designed for the use of physicians, radiologists, students and medical imaging professionals. Trauma to the extensor mechanism of the knee, a common clinical problem, can be accurately evaluated with magnetic resonance mr imaging.
Normal mr imaging anatomy of the knee pdf free download. The authors goals were to provide a standardized evaluation and reporting of knee mr imaging. The knee is a complex joint that flexes, extends, and twists slightly from side to side. Knee pain in young patients is a common indication for knee mri. The multi planar anatomy of the knee was determined. Knowing the anatomy and the normal signal in mri of the different structures of the knee. This webpage presents the anatomical structures found on knee mri. The knee is the meeting point of the femur thigh bone in the upper leg and the tibia shinbone in the. Webmds knee anatomy page provides a detailed image and definition of the knee and its parts including ligaments, bones, and muscles. Knee osteoarthritis prevalence, risk factors, pathogenesis. This article focuses on how to systematically approach. Mr imaging appearance of the extensor mechanism of the. Proximal attachment of posterior cruciate ligament j. Magnetic resonance imaging of the knee and correlation with.
This mri knee coronal cross sectional anatomy tool is absolutely free to use. Your doctor may order an mri scan if they suspect any abnormalities within your knee joint. Highresolution magnetic resonance imaging of the knee joint ajr. Ecr 2015 c2566 mri anatomy and anatomical variations of the knee by. An mri of the knee of a healthy subject was performed in the 3 planes of space coronal, axial, sagittal commonly used in osteoarticular imaging, with two weightings most commonly used to explore the musculoskeletal pathology of the knee. Many excellent texts and atlases have been written to serve this.
Injuries such as anterior cruciate ligament, meniscus and rotator cuff tears are all easily diagnosed when there is a firm understanding and knowledge of human anatomy. Because of its excellent softtissue contrast, magnetic resonance imaging mri has proven very useful for identifying these important structures. The authors intended audience is radiology residents, musculoskeletal fellows, and staff radiologists both. Background the knee anatomy is complex and can be difficult to understand especially in cross section mri.
620 804 1319 115 463 1221 908 1520 1524 1133 676 1043 610 541 473 1135 883 86 1293 1242 1107 180 1585 1326 1140 1360 802 225 672 1451 69 160 903 513 1532 1558 72 128 915 1200 1101 1488 648 986