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(Anterior cruciate ligament) AND imaging

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https://www.readbyqxmd.com/read/28730928/feasibility-of-na-18-f-pet-ct-and-mri-for-noninvasive-in-vivo-quantification-of-knee-pathophysiological-bone-metabolism-in-a-canine-model-of-post-traumatic-osteoarthritis
#1
Maria I Menendez, Bianca Hettlich, Lai Wei, Michael V Knopp
PURPOSE: To assess and quantify by molecular imaging knee osseous metabolic changes serially in an in vivo canine model of posttraumatic osteoarthritis (PTOA) of the knee utilizing sodium fluoride (Na(18)F) positron emission tomography (PET)/computed tomography (CT) coregistered with magnetic resonance imaging (MRI). MATERIALS AND METHODS: Sodium fluoride PET imaging of 5 canines was performed prior to anterior cruciate ligament transection (ACLT) and 2 times post-ACLT (3 and 12 weeks)...
January 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28717622/semitendinosus-muscle-architecture-during-maximum-isometric-contractions-in-individuals-with-anterior-cruciate-ligament-reconstruction-and-controls
#2
Evagelos Karagiannidis, Eleftherios Kellis, Nikiforos Galanis, Baltzopoulos Vasilios
BACKGROUND: The most widely used graft as a replacement in anterior cruciate ligament (ACL) reconstruction is the semitendinosus (ST) tendon graft. After harvesting for ACL reconstruction, the hamstring tendon regenerates in most people and becomes similar to normal. The effect of graft harvest on muscle morphology and function remains unclear. The present study aimed to examine the morphology of the ST during isometric contraction after harvesting the ST tendon for ACL reconstruction...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28710543/acute-non-contact-anterior-cruciate-ligament-tears-are-associated-with-relatively-increased-vastus-medialis-to-semimembranosus-cross-sectional-area-ratio-a-case-control-retrospective-mr-study
#3
Ged G Wieschhoff, Jacob C Mandell, Gregory J Czuczman, Violeta Nikac, Nehal Shah, Stacy E Smith
OBJECTIVE: Hamstring muscle deficiency is increasingly recognized as a risk factor for anterior cruciate ligament (ACL) tears. The purpose of this study is to evaluate the vastus medialis to semimembranosus cross-sectional area (VM:SM CSA) ratio on magnetic resonance imaging (MRI) in patients with ACL tears compared to controls. MATERIALS AND METHODS: One hundred knee MRIs of acute ACL tear patients and 100 age-, sex-, and side-matched controls were included. Mechanism of injury, contact versus non-contact, was determined for each ACL tear subject...
July 15, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28707115/preoperative-magnetic-resonance-imaging-predicts-eligibility-for-arthroscopic-primary-anterior-cruciate-ligament-repair
#4
Jelle P van der List, Gregory S DiFelice
PURPOSE: To assess the role of preoperative magnetic resonance imaging (MRI) on the eligibility for arthroscopic primary anterior cruciate ligament (ACL) repair. METHODS: All patients undergoing ACL surgery between 2008 and 2017 were included. Patients underwent arthroscopic primary repair if sufficient tissue length and quality were present, or they underwent single-bundle ACL reconstruction. Preoperative MRI tear locations were graded with the modified Sherman classification: type I (>90% distal remnant length), type II (75-90%), or type III (25-75%)...
July 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28705571/tunnel-widening-after-acl-reconstruction-with-aperture-screw-fixation-or-all-inside-reconstruction-with-suspensory-cortical-button-fixation-volumetric-measurements-on-ct-and-mri-scans
#5
Raul Mayr, Vinzenz Smekal, Christian Koidl, Christian Coppola, Josef Fritz, Ansgar Rudisch, Christof Kranewitter, René Attal
BACKGROUND: Tunnel widening after anterior cruciate ligament reconstruction (ACLR) is influenced by the surgical and fixation techniques used. Computed tomography (CT) is the most accurate image modality for assessing tunnel widening, but magnetic resonance imaging (MRI) might also be reliable for tunnel volume measurements. In the present study tunnel widening after ACLR using biodegradable interference screw fixation was compared with all-inside ACLR using button fixation, with tunnel volume changes being measured on CT and MRI scans...
July 10, 2017: Knee
https://www.readbyqxmd.com/read/28680900/semitendinosus-tendon-for-acl-reconstruction-regrowth-and-mechanical-property-recovery
#6
Stephen M Suydam, Daniel H Cortes, Michael J Axe, Lynn Snyder-Mackler, Thomas S Buchanan
BACKGROUND: Semitendinosus/gracilis (STG) tendon autograft has been used effectively for restoring knee stability after anterior cruciate ligament (ACL) rupture. Though ACL reconstruction with STG autograft is an effective surgical technique for return to sports, short-term hamstring strength asymmetries exist after surgery. Although imaging evidence has demonstrated regrowth and reorganization of the semitendinosus (ST) tendon, no studies show whether the regrowth is associated with residual muscle function...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28680898/factors-affecting-the-outcomes-of-arthroscopically-repaired-traumatic-vertical-longitudinal-medial-meniscal-tears
#7
Erdal Uzun, Abdulhamit Misir, Turan Bilge Kizkapan, Mustafa Ozcamdalli, Soner Akkurt, Ahmet Guney
BACKGROUND: Although numerous studies have assessed arthroscopic medial meniscal repairs, few studies have focused on factors affecting outcomes of vertical longitudinal and bucket-handle repairs. PURPOSE: To evaluate the factors affecting clinical outcomes of arthroscopically repaired traumatic vertical longitudinal and bucket-handle medial meniscal tears. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A total of 223 patients underwent arthroscopic repair for medial meniscal tears between 2007 and 2012; 140 patients had isolated tears or concurrent anterior cruciate ligament (ACL) reconstruction, and 80 patients (76 men, 4 women; mean age, 29...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28680891/is-the-grafted-tendon-shifted-anteriorly-in-the-femoral-tunnel-at-the-postremodeling-phase-after-anterior-cruciate-ligament-reconstruction-a-clinical-mri-study
#8
Jun Onodera, Kazunori Yasuda, Tetsuro Masuda, Yoshie Tanabe, Nobuto Kitamura, Tomonori Yagi, Eiji Kondo
BACKGROUND: Based on previous in vitro studies, it has been commonly believed that during anterior cruciate ligament (ACL) reconstruction with hamstring tendon, the grafted tendon is shifted anteriorly in the tunnel permanently after the graft is anchored to the tunnel wall. However, this has not been proven by in vivo studies. HYPOTHESIS: At 1 year after anatomic double-bundle ACL reconstruction, the grafted tendons may not be shifted anteriorly in the femoral tunnel but anchored to the bony wall at the center of the tunnel...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28680889/the-location-of-anterior-cruciate-ligament-tears-a-prevalence-study-using-magnetic-resonance-imaging
#9
Jelle P van der List, Douglas N Mintz, Gregory S DiFelice
BACKGROUND: Over the past decade, there has been a resurgence of interest in anterior cruciate ligament (ACL) preservation. Proximal and distal avulsion tears have been treated with arthroscopic primary repair, while augmented repair, remnant tensioning, primary repair with biological scaffold, and remnant preservation have been proposed for different types of midsubstance tears. Currently, the incidence of these different tear types is unknown. PURPOSE: To propose a magnetic resonance imaging (MRI) classification system for different tear types based on clinical relevance and to assess the distribution of these different ACL tear types...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28680888/early-graft-tunnel-healing-after-anterior-cruciate-ligament-reconstruction-with-intratunnel-injection-of-bone-marrow-mesenchymal-stem-cells-and-vascular-endothelial-growth-factor
#10
Rosy Setiawati, Dwikora Novembri Utomo, Fedik Abdul Rantam, Nadia Nastassia Ifran, Nicolaas C Budhiparama
BACKGROUND: Bone marrow mesenchymal stem cells (BM-MSCs) are multipotent adult stem cells and have become an important source of cells for engineering tissue repair and cell therapy. Vascular endothelial growth factor (VEGF) promotes angiogenesis and contributes fibrous integration between tendon and bone during the early postoperative stage. Both MSCs and VEGF can stimulate cell proliferation, differentiation, and matrix deposition by enhancing angiogenesis and osteogenesis of the graft in the tunnel...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28669473/editorial-commentary-ultrasound-barely-beats-magnetic-resonance-imaging-in-knee-anterolateral-ligament-evaluation%C3%A2-but-does-this-change-the-treatment-of-the-anterior-cruciate-ligament-deficient-knee
#11
EDITORIAL
Michael J Rossi
Ultrasound (US) examination of the anterolateral ligament (ALL) in the anterior cruciate ligament-deficient knee betters magnetic resonance imaging analysis with slightly higher identification rate of the entire ALL presumably due to the ability to test in a functional pivot shift configuration. The ALL was injured in 63% of the anterior cruciate ligament-deficient knees and the injury occurred at the tibial insertion in all cases. Although the authors propose US to be the new "gold standard" for diagnosing ALL injuries, there still remains a question of whether there is any necessity for an US diagnosis of ALL injury when the pivot shift test may provide the necessary information, and the consensus for ALL reconstruction or lateral extra-articular tenodesis has yet to be reached...
July 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28657154/tissue-engineered-tendon-constructs-for-rotator-cuff-repair-in-sheep
#12
Stoyna S Novakova, Vasudevan D Mahalingam, Shelby E Florida, Christopher L Mendias, Answorth Allen, Ellen M Arruda, Asheesh Bedi, Lisa M Larkin
Current rotator cuff repair commonly involves the use of single or double row suture techniques, and despite successful outcomes, failure rates continue to range from 20-95%. Failure to regenerate native biomechanical properties at the enthesis is thought to contribute to failure rates. Thus, the need for technologies that improve structural healing of the enthesis after rotator cuff repair is imperative. To address this issue, our lab has previously demonstrated enthesis regeneration using a tissue-engineered graft approach in a sheep anterior cruciate ligament (ACL) repair model...
June 28, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28655628/tunnel-positioning-assessment-after-anterior-cruciate-ligament-reconstruction-at-12-months-comparison-between-3d-ct-and-3d-mri-a-pilot-study
#13
Emmanuel Ducouret, Philippe Loriaut, Patrick Boyer, Anne Perozziello, Lionel Pesquer, Charbel Mounayer, Benjamin Dallaudiere
BACKGROUND: Tunnel positioning assessment is a major issue after anterior cruciate ligament (ACL) reconstruction surgery. Historically, it used plain X-ray and, more recently, CT with 3D reconstruction. MRI is a reliable method of assessing ACL graft integrity and postoperative complications. To our knowledge, there have been no studies of efficacy in tunnel positioning assessment. The aim of this study was to assess the efficacy of 3D MRI in assessing femoral and tibial tunnel positioning after ACL reconstruction...
June 24, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28654381/preclinical-multimodal-molecular-imaging-using-18-f-fdg-pet-ct-and-mri-in-a-phase-i-study-of-a-knee-osteoarthritis-in-in-vivo-canine-model
#14
Maria I Menendez, Bianca Hettlich, Lai Wei, Michael V Knopp
The aim of this study was to use a multimodal molecular imaging approach to serially assess regional metabolic changes in the knee in an in vivo anterior cruciate ligament transection (ACLT) canine model of osteoarthritis (OA). Five canine underwent ACLT in one knee and the contralateral knee served as uninjured control. Prior, 3, 6, and 12 weeks post-ACLT, the dogs underwent (18)F-fluoro-d-glucose ((18)F-FDG) positron emission tomography (PET)/computed tomography (CT) and magnetic resonance imaging (MRI). The MRI was coregistered with the PET/CT, and 3-dimensional regions of interest (ROIs) were traced manually and maximum standardized uptake values (SUVmax) were evaluated...
January 1, 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28653872/posttraumatic-bone-marrow-lesion-volume-and-knee-pain-within-4-weeks-after-anterior-cruciate-ligament-injury
#15
Jeffrey B Driban, Stefan Lohmander, Richard B Frobell
CONTEXT:   After an anterior cruciate ligament (ACL) injury, a majority of patients have a traumatic bone marrow lesion (BML, or bone bruise). The clinical relevance of posttraumatic lesions remains unclear. OBJECTIVE:   To explore the cross-sectional associations between traumatic BML volume and self-reported knee pain and symptoms among individuals within 4 weeks of ACL injury. DESIGN:   Cross-sectional exploratory analysis of a randomized clinical trial...
June 2, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28647841/anterior-cruciate-ligament-tibial-insertion-site-is-elliptical-or-triangular-shaped-in-healthy-young-adults-high-resolution-3-t-mri-analysis
#16
Yasutaka Tashiro, Gian Andrea Lucidi, Tom Gale, Kanto Nagai, Elmar Herbst, James J Irrgang, Yasuharu Nakashima, William Anderst, Freddie H Fu
PURPOSE: To clarify the morphology of anterior cruciate ligament (ACL) tibial insertion site in healthy young knees using high-resolution 3-T MRI. METHODS: Subjects were 50 ACL-reconstructed patients with a mean age of 21.4 ± 6.8 years. The contralateral healthy knees were scanned using high-resolution 3-T MRI. The tibial insertion sites of the anteromedial (AM) and posterolateral (PL) bundle fibres, and the ACL attachment on the anterior horn of lateral meniscus (AHLM) were segmented from the MR images, and 3D models were reconstructed to evaluate the morphology...
June 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28646381/stenotic-intercondylar-notch-type-is-correlated-with-anterior-cruciate-ligament-injury-in-female-patients-using-magnetic-resonance-imaging
#17
Theodoros Bouras, Peter Fennema, Stephen Burke, Hilary Bosman
PURPOSE AND HYPOTHESIS: The principal purpose of this paper was to identify whether femoral notch morphology was different in females without anterior cruciate ligament (ACL) injury from those with ACL injury. Magnetic resonance imaging (MRI) was used to assess the femoral notch type, notch width index and 'α angle' in female patients and measure these differences. METHODS: This is a retrospective case control study of 119 female patients, 58 with ACL injury and 61 patients without ACL injury who underwent knee MRI between March 2014 and April 2016...
June 23, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28642647/comparison-between-rendering-3d-ct-and-transparent-3d-ct-in-acl-tunnel-positioning
#18
Marcos Amstalden Barros, Tiago Lazzaretti Fernandes, Dimitris Dimitriou, André Pedrinelli, Arnaldo José Hernandez
OBJECTIVE: To compare the transparent 3D computed tomography (CT) image protocol against conventional 3D-CT image-rendering protocol to assess femoral tunnel position in anatomic anterior cruciate ligament (ACL) reconstructions . METHODS: Eight knee CT scans from cadavers were analyzed by image rendering 3D-CT protocol, using Rhinoceros((r)) software. The central point of the ACL tunnel was set using the sagittal plane. Same CT scans were analyzed using transparent 3D-CT measurement protocol with OsiriX((r)) software...
January 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28621912/use-of-estradiol-promotes-graft-bone-healing-in-rabbit-model-of-anterior-cruciate-ligament-reconstruction-with-a-polyethylene-terephthalate-ligament
#19
Fang Chai, Fang Wan, Jia Jiang, Siheng Wang, Shiyi Chen
The purpose of this study was to investigate whether the local use of estradiol after anterior cruciate ligament (ACL) reconstruction with a polyethylene terephthalate (PET) artificial ligament graft could promote graft-bone healing. A total of 45 New Zealand white rabbits underwent ACL reconstruction with a PET ligament graft. The experimental groups were administered a local estradiol injection at either a low dose after surgery or a high dose after surgery, and the control group did not receive an injection...
June 16, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28612204/three-dimensional-isotropic-magnetic-resonance-imaging-can-provide-a-reliable-estimate-of-the-native-anterior-cruciate-ligament-insertion-site-anatomy
#20
Daisuke Araki, Eric Thorhauer, Scott Tashman
PURPOSE: This study quantified the error in anterior cruciate ligament (ACL) insertion site location and area estimated from three-dimensional (3D) isotropic magnetic resonance imaging (MRI) by comparing to native insertion sites determined via 3D laser scanning. METHODS: Isotropic 3D DESS MRI was acquired from twelve fresh-frozen, ACL-intact cadaver knees. ACL insertion sites were manually outlined in each MRI slice, and the resulting contours combined to determine the 3D insertion site shape...
June 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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