ACL: Sagittal on MRI - 3 min. An appropriate angle must be given in sagittal plane (parallel to the mid line line of femur and tibia). Bethesda, MD 20894, Copyright FOIA We aimed to identify the anterolateral ligament (ALL) tears in anterior cruciate ligament (ACL)-deficient knees using standard 1.5-Tesla magnetic resonance imaging (MRI). Sagittal PD (TE<30) and fat sat PD (TE36) FOV14, slice 3mm. Axial PD. Sagittal PD. Check the positioning block in the other two planes. > Chondromalacia Diagnostic Value of Oblique Coronal and Oblique Sagittal Magnetic Resonance Imaging (MRI) in Diagnosis of Anterior Cruciate Ligament (ACL) Tears Introduction: Tears of the anterior cruciate ligament (ACL) are common among young athletes and diagnosis may be difficult especially in the young population. 2021 Mar 29;9(3):2325967121992472. doi: 10.1177/2325967121992472. 11: Acute ACL tear. Clin Sports Med. An avulsion fracture (Segond fracture) of the lateral tibia secondary to injury of the meniscotibial portion of the middle third capsular ligament is considered indirect evidence of an ACL injury (Fig. Applying saturation bands above and below the coronal block will further reduce arterial pulsation artefacts. The ACL graft is taut and parallels the intercondylar roof as expected. Three independent readers evaluated the MR images by the use of three methods: orthogonal sagittal images only (method A); orthogonal sagittal and additional oblique sagittal images (method B); and orthogonal sagittal and oblique coronal images (method C). Findings are those of ACL contusion. Correlation with axial and coronal images is imperative to help radiologists avoid these imaging pitfalls. > Fractures, Please check our new video tutorial for protocols and planning, >  a tear or sprain of the anterior cruciate (KROO-she-ate) ligament (ACL) — (c) Sagittal T2-weighted fat-suppressed MR image shows reactive marrow edema (arrows) surrounding the tibial tunnel cyst. Copyright © 2013 Elsevier B.V. All rights reserved. MRI. METHODS: Eighty-eight knees with intact ACLs were included in this study. J. Cairo Univ., Vol. For ACL, thickness and width were measured on sagittal and axial isotropic 3D T2 weighted images, respectively (Fig. •. Centre the laser beam localiser over the lower border of patella, Suggested protocols, parameters and planning. Metal shrapnel or bullet, >  Standard sagittal and coronal without specific orientation on the ACL and coronal-oblique images orientated along the ACL- graft were obtained. MRI of the Knee Jennifer Swart, M.D. 1 MRI appearance of the distal insertion of the anterior cruciate ligament of the knee: an additional criterion for ligament … 2. Results: MRI is a reliable method of assessing ACL graft integrity and postoperative complications. Check the positioning block in the other two planes. Slices must be sufficient to cover the knee joint from the lateral condyle up to medial condyle. Slices must be sufficient to cover the knee joint from the tibial tuberosity up to the line of superior border of patella. To our knowledge, there have been no studies of efficacy in tunnel positioning assessment. Sagittal PDFS MRI shows attenuation of the graft (white arrow)without a full thickness tear. Grading of Anterior Cruciate Ligament Graft Injuries on Routine Knee MRI with Using Oblique Coronal Imaging Interobserver agreement between the two readers was considered "substantial" with weighted kappa values of 0.614 (imaging group A) and 0.730 (imaging group B). Using the oblique coronal plane, the anteromedial (AM) and posterolateral (PL) bundles of the ACL were distinguished in the reconstructed anatomical data and the MR images. 3).Thickness of CFL and ATFL were also measured in … Hoogeslag RAG, Buitenhuis MB, Brouwer RW, Derks RPH, van Raak SM, Veld RHI'. The MCL: Layer 1 - 4 min. The aim of the study was to evaluate the diagnostic efficacy of utilization of oblique sagittal and oblique coronal MRI techniques separately and concurrently in improving the diagnosis of anterior cruciate ligament (ACL) complete and partial tears. (A) Coronal intermediate-weighted fat saturation (IW FS) magnetic resonance image (MRI) of the right knee in a 39-year-old male with arthroscopically proven posterolateral (PL) bundle tear demonstrates the “gap” sign, referring to the gap between the medial aspect of the lateral femoral condyle and the lateral aspect of the proximal anterior cruciate ligament (ACL) … Medicine (Baltimore). Slices must be sufficient to cover the ACL. >, A satisfactory written consent form must be taken from the patient before entering the scanner room MRI findings were also compared with a gold standard knee arthroscopy, the current. Meniscal tears are also often detectable in the coronal plane. Plan the coronal slices on the axial plane; angle the position block parallel to the medial and lateral condyle of the femur. Unable to load your collection due to an error, Unable to load your delegates due to an error. As you can see it, each patient has three MRI scans taken with respect to three different planes: axial, sagittal and coronal. A significant percentage of partial tears will progress to a functionally complete ACL tear. However, coronal MRI can demonstrate soft tissue or bony Segond avulsions with isolated posterolateral corner injury (2, 9). Coronal PD. … Phase direction in the axial scans must be head to feet, this is to avoid the artifacts form popliteal artery pulsation. Takahashi T, Ohsawa T, Hagiwara K, Kimura M, Takeshita K. Asia Pac J Sports Med Arthrosc Rehabil Technol. CLICK THE SEQUENCES BELOW TO CHECK THE SCANS. MRI is critical in evaluation of the post-operative knee, and the ACL … MRI coronal oblique images were obtained with the knee in extension and used to assess the following characteristics of the AMB and PLB: (1) course of the ligament, (2) location of the tibial attachment, and (3) femoral attachment and geometry of the lateral femoral condyle inner wall. An appropriate angle must be given in sagittal plane (perpendicular to the line of femur and tibia). ACL: Axial on MRI - 2 min. Comparison between arthroscopic findings and 1.5-T and 3-T MRI of oblique coronal and sagittal planes of the knee for evaluation of selective bundle injury of the anterior cruciate ligament. Epub 2008 Dec 17. Phase direction in the axial scans must be head to feet, this is to avoid the artifacts form popliteal artery pulsation. >  Careers. Routine protocol and then assess. Fig. doi: 10.1097/MD.0000000000010001. Check the positioning block in the other two planes. An appropriate angle must be given in coronal plane (parallel to the mid line of femur and tibia). Injury of the ACL can lead to substantial disability; an accurate diagnosis of ACL injury is vital in both short-term and long-term patient care. Phase direction in the axial scans must be head to feet, this is to avoid the artifacts form popliteal artery pulsation. Using saturation bands above and below the sagittal block will reduce further arterial pulsation artefacts. Discordance between MRI and arthroscopy: anterior cruciate ligament (ACL) tear considered as incomplete in the MRI and complete by arthroscopy: a: sagittal PD fat-sat: the fibres (indicated by the white arrowheads) are not clearly visible at their origin; b: coronal oblique PD fat-sat in the axis of the ACL: the fibres (white arrowheads) appear continuous throughout … Ferromagnetic surgical clips or staples Plan the coronal oblique slices on the sagittal plane, angle the position block parallel to the anterior cruciate ligament (ACL). eCollection 2017 Jul. Context: Despite advances in surgical techniques for anterior cruciate ligament (ACL) repair, a significant proportion of patients encounter persisting pain/instability of the knee postoperatively. 2009 Mar;64(3):291-7. doi: 10.1016/j.crad.2008.10.007. The purpose of this study was to evaluate the diagnostic useful-ness of combining oblique sagittal and oblique coronal imaging (ACL views) with traditional orthogonal views for evaluating selective-bundle ACL tears and whether The purpose of this study was to evaluate the diagnostic usefulness of combining oblique sagittal and oblique coronal MRI views of the anterior cruciate ligament (ACL) with traditional orthogonal views for the evaluation of selective-bundle ACL injury and to evaluate whether there is a statistical difference in diagnostic ability between 1.5-T and 3-T MRI. initial inability to weight bear, which improves in a short period Phase direction in these sagittal oblique scans should be right to left to avoid pulsation artefacts from the popliteal artery. Check the positioning block in the other two planes. Oblique coronal and oblique sagittal MRI for diagnosis of anterior cruciate ligament tears and evaluation of anterior cruciate ligament remnant tissue Knee. Slices must be sufficient to cover the knee joint from the pattela down to the line of popliteal artery. Moon SG, Hong SH, Choi JY, Jun WS, Choi JA, Park EA, Kang HS, Kwon JW. coronal pd 3000 25 16 100 3 0.6 384 512 l/r 1 p->a coronal t2 fs 4000 75 16 100 3 0.6 384 512 l/r 2 p->a axial t2 fs 4300 77 16 100 3 0.6 240 320 l/r 2 p->a axial t1 510 10 16 100 4 1 240 320 l/r 1 s->i axial obl t2 2000 70 16 if post acl repair100 3 0.6 320 320 l/r 2 s->i sag 3d dess /cube fs Metallic foreign body in the eye ACL: Coronal View - 2 min. Inclusion criteria for the study included patients undergoing routine magnetic resonance imaging (MRI) of the knee at a single … On a T1 sagittal image the ACL should appear well-defined and black, as in this image. Diagnostic Value of Oblique Coronal and Oblique Sagittal Magnetic Resonance Imaging (MRI) in Diagnosis of Anterior Cruciate Ligament (ACL) Tears. 2a). Would you like email updates of new search results? In this transverse image, the coronal plane that passed closest to the centroid of the tibial plateau was identified. Methods: Inclusion criteria for the study included patients undergoing routine magnetic resonance imaging (MRI) of the knee at a single outpatient orthopedic center who had an intact ACL on MRI. The Coronal PD fat suppressed sequence is designed for the evaluation of the collateral supporting structures, especially when an injury is acute/subacute. Orthop J Sports Med. Comparison of magnetic resonance imaging for patients with acute and chronic anterior cruciate ligament tears. Korean J Radiol. MRI of normal knees was performed with a low‑field‑strength magnet in the coronal plane. The normal anterior cruciate ligament ( ACL) is slightly obliquely orientated (superolateral to inferomedial) Sagittal plane MRIs of the knee are angled to optimise views of the ACL. 360 knee MRI images (coronal view) were used to … Ligament dimensions were measured in the plane that best represented the structure. >  5 Series | 26 CME | 45 videos - Master the Knee on MRI with Dr. Pomeranz Please enable it to take advantage of the complete set of features! Offer earplugs or headphones, possibly with music for extra comfort Sagittal proton density images without (a, c) and with (b, d) fat saturation.Discontinuity of the ACL fascicles in (a) and >  Position the knee in the knee coil and immobilise with cushions We included all patients who underwent primary ACL reconstruction at our center between 2012 and 2015. LCLC, MCL, menisci, cartilage. Angulation/nonlinearity as a primary sign of anterior cruciate ligament (ACL) tear. All subjects had undergone MRI imaging of the knee using a 1.5-T magnet (GE Signa; GE Healthcare, Waukesha, Wisconsin). Check the positioning block in the other two planes. 2014 Jan;21(1):54-7. doi: 10.1016/j.knee.2013.04.016. Plan the sagittal oblique slices on the axial plane, angle the position block parallel to the ACL. A three plane localiser must be taken in the beginning to localise and plan the sequences. (c) Sagittal T2-weighted fat-suppressed MR image shows reactive marrow edema (arrows) surrounding the tibial tunnel cyst. Pregnancy (risk vs benefit ratio to be assessed) Between December 2017 and November 2018, 71 patients, with suspected ACL injury, were examined by MRI using four diagnostic approaches: standard routine images only > Mechanical knee symptoms: catching, locking, snapping, crepitus (a, b) Oblique coronal proton-density–weighted MR images show a linear intrasub-stance tear of the ACL graft (arrow in a), a finding associated with a tibial tunnel cyst (arrowheads in b). The arthroscopic records revealed 27 knees with intact ACLs and 27 with torn ACLs. Results: The average diameter of the ACL was 4.80 mm (3.1-8.3 mm), with a length of 3.8 cm (2.85-4.5 cm). The origin ranged from 9.7 mm to 15.4 mm. > Osteochondral fractures Phase direction in the axial scans must be right to left, this is to avoid the artifacts form popliteal artery pulsation. Diagnostic assessment in anterior cruciate ligament (ACL) tears 211 quired. The coronal slopes of the tibial plateaus were obtained as described by Hashemi et al. Measurements of the angle of inclination were made on MRIs in both the sagittal and coronal … Check the positioning block in the other two planes. An appropriate angle must be given in sagittal plane (parallel to the mid line line of femur and tibia). 87, No. An appropriate angle must be given in coronal plane parallel to the medial and lateral condyle of the femur. Technique. >  If possible provide a chaperone for claustrophobic patients (e.g. Check the positioning block in the other two planes. Four-strand hamstring graft. Localisers are usually less than 25sec. Introduction. Ghasem Hanafi M, Momen Gharibvand M, Jaffari Gharibvand R, Sadoni H. J Med Life. Dedicated knee coil. Note the weight of the patient, Feet first supine 10: ACL tear (arrow). The purpose of this study was to investigate the efficacy of additional oblique magnetic resonance imaging (MRI) for the diagnosis of anterior cruciate ligament (ACL) tear and evaluation of ACL remnant tissue. Using saturation bands above and below the axial block will reduce further arterial pulsation artefacts. Grading anterior cruciate ligament graft injury after ligament reconstruction surgery: diagnostic efficacy of oblique coronal MR imaging of the knee. This presentation is the intellectual property of the author. Figure 16d Tibial tunnel cyst. (a) Coronal FSE T2 fat suppression, (b) sagittal FSE PD, (c) sagittal FSE T2 and (d) sagittal STIR MRI of the right knee. Download : Download full-size image Using saturation bands above and below the coronal block will reduce further arterial pulsation artefacts. Objectives: To assess the location of femoral/tibial tunnels on magnetic resonance imaging (MRI) and to correlate the findings with the ACL graft integrity/graft-related complications. Coronal T2 (top right) and T1 (below) images show nonvisualization of ACL fibers and abnormal increased edema and fluid in the lateral intercondylar notch. At ordinary MRI map, sagittal ACL-tibial angle, coronal ACL-tibial angle, Blumensaat line-ACL angle, angle of inclination of the intercondylar roof, and ACL-tibial insertion site were measured. Slices must be sufficient to cover the ACL. > Marrow abnormalities: avascular necrosis, marrow oedema syndromes, and stress fractures Operative findings were documented in the patient’s official document, which included the survey of the entire joint and anatomical structure, lesions involved with the presence or absence of a tear, its location, the status of the articular cartilage and others. Using saturation bands above and below the coronal block will reduce further arterial pulsation artefacts. Eighty-eight knees with intact ACLs were included in this study. > Infections of bone, joint or soft tissue The presence of the coronal LCL sign was associated with greater anterior tibial translation (7.2 vs 0.2 mm, P < .001) and internal tibial rotation (7.5° vs –2.4°, P = .074) but not posterior tibial slope (7.9° vs 7.9°, P = .973) as … > Neoplasms of bone, joint or soft tissue Results Oblique coronal MRI showed a better agreement with arthroscopy than standard MRI (weighted kappa = 0.865 and 0.753 respectively). > Degenerative chondrosis Injury of the posterior cruciate ligament (PCL) is less common than injury of the anterior cruciate ligament (ACL), and it is difficult to diagnose clinically. Materials and methods: 52 MRI examinations performed between 2008 and 2011 were valued at random in a longitudinal retrospective epidemiological study. Plan the sagittal slices on the axial plane; angle the position block parallel to the lateral condyle of the femur (parallel to ACL). ACL, PCL, menisci, cartilage Coronal T1 and fast STIR (or fat sat PD) Coronal T1 and Fast STIR (or fat sat PD) FOV14. > Osteochondral and articular cartilage infractions The phase direction shown in the example below is anterior to posterior. Phase direction in the axial scans must be head to feet, this is to avoid the artifacts form popliteal artery pulsation. (a, b) Oblique coronal proton-density–weighted MR images show a linear intrasub-stance tear of the ACL graft (arrow in a), a finding associated with a tibial tunnel cyst (arrowheads in b). The shape of the ACL was clearly displayed. He looks at the normal anatomy of the knee and what a torn ACL looks like and the secondary signs of an anterior cruciate ligament injury. First step is to train 9 CNNs, each predicting probabilities of 3 diagnoses (abnormal, acl tear and meniscual tear) based on an MRI series from 3 planes (axial, sagittal and coronal). Level IV (case series). Femoral attachment of anterior cruciate ligament remnant tissue influences the stability of the anterior cruciate ligament-injured knee in patients over 40 years old. MRI Knee - Sagittal T1 - Normal ACL. We retrospectively reviewed the records of 54 knees. In the current study, we describe an oblique coronal plane for imaging the normal ACL bundles using low-field strength MRI at 0.2 T and evaluate the efficacy with which the normal ACL … •Suspected ACL tear Imaging: MRI knee non-contrast •Best MRI views: Sagittal, Coronal, ACL oblique •Findings: discontinuity of fibers, increased T2 signal •Associations: unhappy triad, pivot-shift fracture •Treatment: if young and active→surgery; old/inactive: rest, physical therapy •Prognosis: Good to Excellent (although long term Measurements of the angle of inclination were made on MRIs in both the sagittal and coronal planes. research-article . eCollection 2021 Mar. 8600 Rockville Pike Plan the sagittal slices on the axial plane; angle the position block parallel to the lateral condyle of the femur (parallel to anterior cruciate ligament). >  cardiac pacemaker, insulin pump biostimulator, neurostimulator, cochlear implant, and hearing aids) OBJECTIVE. Explain the procedure to the patient Methods: Inclusion criteria for the study included patients undergoing routine magnetic resonance imaging (MRI) of the knee at a single outpatient orthopedic center who had an intact ACL on MRI. The phase direction for these coronal oblique scans should be right to left to avoid pulsation artefacts from the popliteal artery. Ask the patient to remove all metal objects including keys, coins, wallet, cards with magnetic strips, jewellery, hearing aid and hairpins
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