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Knee MR image

Namik Sahin, Teoman Atici, Guven Ozkaya
Objective: The primary aim of this study is to compare tibial tuberosity-trochlear groove (TTTG) distance in patients with or without knee osteoarthritis. Additionally, the variability of tibial tubercle according to trochlear groove was evaluated. Materials and Methods: In this retrospective cohort study, TTTG distance was measured with two different methods on magnetic resonance (MR) images. TTTG distance was measured by the familiar method on 173 MR images, and by the novel method on 157 MR images of 175 patients totally...
February 2018: Eurasian Journal of Medicine
Julio Brandao Guimaraes, Luca Facchetti, Benedikt J Schwaiger, Alexandra S Gersing, Xiaojuan Li, Thomas M Link
OBJECTIVES: To assess (i) normal imaging anatomy of the popliteomeniscal fascicles, (ii) prevalence and natural evolution of popliteomeniscal fascicle tears (PMFT) in subjects with traumatic anterior cruciate ligament (ACL) tears over 2 years and (iii) compare knee cartilage degeneration in subjects with and without PMFT longitudinally. METHODS: 57 subjects with ACL tears were screened for PMFT. Morphological (high-resolution 3D fast spin-echo) and compositional (T1ρ and T2 mapping) MR imaging was performed prior to and 2 years after ACL reconstruction...
February 23, 2018: European Radiology
Robert M Kwee, Nima Hafezi-Nejad, Frank W Roemer, Bashir A Zikria, David J Hunter, Ali Guermazi, Shadpour Demehri
Purpose To determine whether anterior cruciate ligament (ACL) mucoid degeneration in participants with or at risk for osteoarthritis is associated with longitudinal risk of radiographic progression of medial tibiofemoral compartment joint space loss (JSL). Materials and Methods Baseline demographic, clinical, radiographic, and Magnetic Resonance (MR) Imaging Osteoarthritis Knee Score (MOAKS) data were evaluated in 600 participants from the Osteoarthritis Initiative database. Two blinded musculoskeletal radiologists independently evaluated baseline MR images for ACL mucoid degeneration...
February 21, 2018: Radiology
Grace H Lo, Erika Schneider, Jeffrey B Driban, Lori Lyn Price, David J Hunter, Charles B Eaton, Marc C Hochberg, Rebecca D Jackson, C Kent Kwoh, Michael C Nevitt, John A Lynch, Timothy E McAlindon
OBJECTIVE: Osteoarthritis (OA) is a disease with a substantial public health burden. Quantitative assessments of periarticular bone may be a biomarker capable of monitoring early disease progression. The purpose of this study was to evaluate whether measures of periarticular bone associate with longitudinal structural progression. METHODS: We conducted a 12-18 months longitudinal study using the Osteoarthritis Initiative (OAI). Participants received knee dual-energy x-ray absorptiometry (DXA), trabecular magnetic resonance (MR) imaging, and x-rays...
January 31, 2018: Seminars in Arthritis and Rheumatism
J Knox, V Pedoia, A Wang, M Tanaka, G B Joseph, J Neumann, T M Link, X Li, C B Ma
OBJECTIVE: To evaluate the longitudinal changes in meniscal T1ρ/T2 signal post-reconstruction in patients with acute anterior cruciate ligament (ACL) injury and to investigate the association with T1ρ/T2 signal in articular knee cartilage. METHOD: In this prospective study, knees of 37 patients with ACL-injury and reconstruction in addition to 13 healthy controls were scanned using magnetic resonance imaging (MRI) T1ρ/T2 mapping. Quantitative analysis of the meniscus was performed in the anterior/posterior horns of lateral/medial meniscus fourteen sub-compartments of cartilage spanning the medial/lateral area of the tibia and femoral condyles...
February 10, 2018: Osteoarthritis and Cartilage
Ippei Kitade, Ryuhei Kitai, Hiroyuki Neishi, Ken-Ichiro Kikuta, Seiichiro Shimada, Akihiko Matsumine
BACKGROUND: A few previous studies have reported a change in gait motion in idiopathic normal pressure hydrocephalus (iNPH) patients after shunt surgery compared with before shunt surgery; however, there has been no detailed quantitative investigation of gait, including kinetic and kinematic parameters. Furthermore, the relationship between gait parameters and magnetic resonance (MR) imaging has not been confirmed. RESEARCH QUESTION: We investigated the gait motion in patients with iNPH, and evaluated the relationship between kinetic gait parameters and MR imaging before and after shunt surgery...
January 12, 2018: Gait & Posture
R A Briggs, J R Houck, M J Drummond, J M Fritz, P C LaStayo, R L Marcus
BACKGROUND: Muscle mass deficits endure after hip fracture. Strategies to improve muscle quality may improve mobility and physical function. It is unknown whether training after usual care yields muscle quality gains after hip fracture. OBJECTIVES: To determine whether muscle quality improves after hip fracture with high-intensity resistance training and protein supplementation. DESIGN: Case series. SETTING: University of Utah Skeletal Muscle Exercise Research Facility...
2018: Journal of Frailty & Aging
Shekhar S Chandra, Craig Engstrom, Jurgen Fripp, Ales Neubert, Jin Jin, Duncan Walker, Olivier Salvado, Charles Ho, Stuart Crozier
PURPOSE: To develop a local contrast-enhancing and feature-preserving high dynamic range (HDR) image processing algorithm for multichannel and multisequence MR images of multiple body regions and tissues, and to evaluate its performance for structure visualization, bias field (correction) mitigation, and automated tissue segmentation. METHODS: A multiscale-shape and detail-enhancement HDR-MRI algorithm is applied to data sets of multichannel and multisequence MR images of the brain, knee, breast, and hip...
February 4, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Seung Hyun Lee, Young Han Lee, Ho-Taek Song, Jin-Suck Suh
The purpose was to evaluate the feasibility of quantitative MRI T2 mapping based on the quantitative MRI (QRAPMASTER) sequence for the quantitative assessment of knee cartilage. The T2 values from the phantom study showed excellent correlation between the two techniques (r2 = 0.998). The cartilage T2 values exhibited strong correlations (r2 = 0.867-0.982). Quantitative MRI (qMRI) T2 mapping can be used as an alternative to multi-echo T2 mapping, with relatively short scan time.
February 1, 2018: Magnetic Resonance in Medical Sciences: MRMS
Julie E Davis, Matthew S Harkey, Robert J Ward, James W MacKay, Bing Lu, Lori Lyn Price, Charles B Eaton, Mary F Barbe, Grace H Lo, Timothy E McAlindon, Jeffrey B Driban
PURPOSE: We aimed to characterize the agreement between distinct structural changes on magnetic resonance (MR) imaging and self-reported injury in the 12 months leading to incident common or accelerated knee osteoarthritis (KOA). MATERIALS AND METHODS: We conducted a descriptive study using data from baseline and the first 4 annual visits of the Osteoarthritis Initiative. Knees had no radiographic KOA at baseline (Kellgren-Lawrence [KL]<2). We classified 2 groups: 1) accelerated KOA: a knee developed advanced-stage KOA (KL=3 or 4) within 48 months and 2) common KOA: a knee increased in radiographic severity (excluding those with accelerated KOA)...
January 30, 2018: Clinical Anatomy
Valdis Goncars, Konstantins Kalnberzs, Eriks Jakobsons, Ilze Enģele, Ieva Briede, Kristaps Blums, Kristaps Erglis, Martins Erglis, Liene Patetko, Indrikis Muiznieks, Andrejs Erglis
Objectives To evaluate the main symptoms of knee osteoarthritis (OA) and tissue structure changes after a single dose bone marrow-derived mononuclear cell (BM MNC) intra articular injection. Case series study. Patients with knee OA Kellgren Lawrence (K-L) grade II and III received 1 injection of BM MNC. The clinical results were analyzed with the Knee injury and Osteoarthritis Outcome Score (KOOS) and Knee Society Score (KSS) before, 3, 6, and 12 months after injection. Radiological evaluation was performed with a calibrated x-ray and the magnetic resonance (MR) imaging before and 6 to 7 months postinjection...
January 1, 2018: Cartilage
Taehun Kim, Haksun Chung, Hyungmin Lee, Young Choi, Jung-Hwan Son
RATIONALE: The fabella is a normal structure, but is occasionally reported to cause posterior knee pain. The aim of this study was to present fabella syndrome after high tibial osteotomy. PATIENT CONCERNS: A 55-year-old female patient was admitted to the hospital due to about 1 year and 8 months of left knee pain. Sclerosis was observed in the anterior margin of the fabella in the preoperative magnetic resonance (MR) T2 image, and reactive bone marrow was found and was considered to be due to degeneration of the distal femur...
January 2018: Medicine (Baltimore)
Fearghal P Behan, Thomas M Maden-Wilkinson, Matt T G Pain, Jonathan P Folland
INTRODUCTION: Females experience higher risk of anterior cruciate ligament (ACL) injuries; males experience higher risk of hamstring strain injuries. Differences in injury may be partially due to sex differences in knee flexor (KF) to knee extensor (KE) muscle size ratio and the proportional size of constituent muscles. PURPOSE: To compare the absolute and proportional size, and mass distribution, of individual KE and KF muscles, as well as overall size and balance (size ratio) of these muscle groups between the sexes...
2018: PloS One
Federico Bruno, Antonio Barile, Francesco Arrigoni, Antonella Laporta, Anna Russo, Marina Carotti, Alessandra Splendiani, Ernesto Di Cesare, Carlo Masciocchi
Standard knee imaging with MRI is usually performed with patient in recumbent position under non-weight-bearing conditions. Recently, magnetic resonance imaging systems to scan the knee joint under weight bearing conditions has been proposed as an approach to improve the clinical utility of musculoskeletal MRI. Imaging under loading can be useful to understand the natural motion behavior of the knee joint and to identify conditions that are challenging to diagnose by using standard position. We reviewed the literature on weight-bearing MR imaging of the knee to describe the current state of use of such MRI technologies, evaluating the advantages and the potential limitations of these technologies...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
Volkan Kızılgöz, Ali Kemal Sivrioğlu, Hasan Aydın, Türkhun Çetin, Gökhan Ragıp Ulusoy
Objective This study was performed to evaluate the visibility of the knee's anterolateral ligament (ALL) by magnetic resonance (MR) imaging when evaluating injuries of the ALL in relation to injuries of the anterior cruciate ligament (ACL). Methods Two reviewers retrospectively analyzed MR images for the visibility and dimensions of the ALL and the relationship between ALL and ACL injuries. The intraclass correlation coefficient (ICC) and kappa analysis were used to assess interobserver reliability. The chi-square test was used to assess the relationship between ALL and ACL injuries...
January 1, 2018: Journal of International Medical Research
Erin C Argentieri, Alissa J Burge, Hollis G Potter
Magnetic resonance imaging (MRI) provides an effective and noninvasive means by which to evaluate articular cartilage within the knee. Existing techniques can be utilized to detect and monitor longitudinal changes in cartilage status due to injury or progression of degenerative disease. Quantitative MRI (qMRI) techniques can provide a metric by which to evaluate the efficacy of cartilage repair techniques and offer insight into the composition of cartilage and cartilage repair tissue. In this review, we provide background on MR signal generation and decay, the utility of morphologic MRI assessment, and qMRI techniques for the biochemical assessment of cartilage (dGEMRIC, T2, T2*, T1ρ, sodium, gagCEST)...
January 18, 2018: Journal of Knee Surgery
Monica Tafur, Linda Probyn, Jaskarndip Chahal, Lawrence M White
Magnetic resonance imaging (MRI) represents the preferred noninvasive imaging technique to diagnose meniscal pathology in the pre- and postoperative setting. Furthermore, characterization of meniscal tissue MR properties has been possible by the development of advanced MRI techniques. Suspected meniscal tears are a frequent indication for MRI and the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) classification system has been developed to facilitate accurate and uniform reporting of such meniscal tears...
January 12, 2018: Journal of Knee Surgery
Feliks Kogan, Evan Levine, Akshay S Chaudhari, Uchechukwuka D Monu, Kevin Epperson, Edwin H G Oei, Garry E Gold, Brian A Hargreaves
PURPOSE: To demonstrate and evaluate the scan time and quantitative accuracy of simultaneous bilateral-knee imaging compared with single-knee acquisitions. METHODS: Hardware modifications and safety testing was performed to enable MR imaging with two 16-channel flexible coil arrays. Noise covariance and sensitivity-encoding g-factor maps for the dual-coil-array configuration were computed to evaluate coil cross-talk and noise amplification. Ten healthy volunteers were imaged on a 3T MRI scanner with both dual-coil-array bilateral-knee and single-coil-array single-knee configurations...
December 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
P M Tscholl, R M Biedert, F Wanivenhaus, S F Fucentese
Patellar tendinopathy (PT) is a frequent overuse injury of the extensor knee apparatus, whereas as up to 30% of the athletes might suffer from persisting symptoms during their entire career. In the present case-control study, 47 patients (30.8 ± 11.4 years) with PT with intratendinous alteration (PTita) of a minimum of ≥25% of the axial surface on MRI and minimum Blazina score of II (pain during without limiting sports activity) were included; MR images were analyzed for trochlear geometry, patellar height/tilt, and tibial tubercle-trochlear groove distance (TT-TG)...
April 2018: Scandinavian Journal of Medicine & Science in Sports
Kwadwo A Owusu-Akyaw, Lauren N Heckelman, Hattie C Cutcliffe, E Grant Sutter, Zoë A Englander, Charles E Spritzer, William E Garrett, Louis E DeFrate
Anterior cruciate ligament (ACL) deficient patients have an increased rate of patellofemoral joint (PFJ) osteoarthritis (OA) as compared to the general population. Although the cause of post-injury OA is multi-factorial, alterations in joint biomechanics may predispose patients to cartilage degeneration. This study aimed to compare in vivo PFJ morphology and mechanics between ACL deficient and intact knees in subjects with unilateral ACL ruptures. Eight male subjects underwent baseline MRI scans of both knees...
January 23, 2018: Journal of Biomechanics
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