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https://www.readbyqxmd.com/read/29792070/chondral-delamination-of-fresh-osteochondral-allografts-after-implantation-in-the-knee-a-matched-cohort-analysis
#1
Ryan C Rauck, Dean Wang, Matthew Tao, Riley J Williams
Introduction Delamination of the chondral surface of an osteochondral allograft (OCA) from the underlying cancellous bone has been described as a mode of failure after implantation in the knee. Our hypothesis was that increased storage time of the OCA is associated with increased risk of graft delamination after implantation. Methods Prospective data on 13 patients with evidence of OCA delamination identified on magnetic resonance imaging or during subsequent surgery from 2000 to 2015 were reviewed. A cohort of 33 patients without evidence of graft delamination were then matched to the delamination group based on recipient age, sex, body mass index (BMI), and chondral defect location...
May 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29790633/diagnostic-accuracy-of-point-of-care-ultrasound-for-evaluation-of-early-blood-induced-joint-changes-comparison-with-mri
#2
W Foppen, I C van der Schaaf, F J A Beek, W P T M Mali, K Fischer
INTRODUCTION: Recurrent joint bleeding is the hallmark of haemophilia. Synovial hypertrophy observed with Magnetic Resonance Imaging (MRI) is associated with an increased risk of future joint bleeding. AIM: The aim of this study was to investigate whether point-of-care ultrasound (POC-US) is an accurate alternative for MRI for the detection of early joint changes. METHODS: In this single centre diagnostic accuracy study, bilateral knees and ankles of haemophilia patients with no or minimal arthropathy on X-rays were scanned using POC-US and 3 Tesla MRI...
May 23, 2018: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29789912/meniscal-pathologies-on-mri-correlate-with-increased-bone-tracer-uptake-in-spect-ct
#3
Jan Rechsteiner, Michael T Hirschmann, Milos Dordevic, Anna L Falkowski, Enrique A Testa, Felix Amsler, Anna Hirschmann
OBJECTIVES: To assess the relationship of subchondral bone tracer uptake (BTU) on SPECT/CT and meniscal pathologies on MRI in patients with painful knees. METHODS: Twenty-five patients who had MRI and SPECT/CT within 3 months without knee surgery or grade ≥3 cartilage lesions were prospectively included. Maximum values of each subchondral femorotibial area were quantified and a ratio was calculated in relation to a femoral shaft reference region, which represented the BTU background activity...
May 22, 2018: European Radiology
https://www.readbyqxmd.com/read/29788942/use-of-autologous-bone-marrow-stem-cell-implantation-for-osteonecrosis-of-the-knee-in-sickle-cell-disease-a-preliminary-report
#4
Gildasio Daltro, Bruno Adelmo Franco, Thiago Batista Faleiro, Davi Araujo Veiga Rosário, Paula Braga Daltro, Roberto Meyer, Vitor Fortuna
BACKGROUND: The purpose of our study was to evaluate safety, feasibility and clinical results of bone marrow mononuclear cell (BMC) implantation for early-stage osteonecrosis of the knee (OK) secondary to sickle cell disease. METHODS: Thirty-three SCD patients (45 knees) with OK treated with BMC implantation in the osteonecrotic lesion were clinically and functionally evaluated through the American Knee Society Clinical Score (KSS), Knee Functional Score (KFS) and Numeric Rating Scale (NRS) pain score...
May 22, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29781570/effect-of-motor-based-speech-intervention-on-articulatory-placement-in-the-treatment-of-a-posterior-nasal-fricative-a-preliminary-mri-study-on-a-single-subject
#5
Kazlin N Mason, Eshan Pua, Jamie L Perry
BACKGROUND: Posterior nasal fricatives are a learned compensatory articulation error and commonly substituted for oral fricatives. Treatment of such articulation errors requires the modification or teaching of skilled movements. A motor-based approach is designed to teach the complex motor skill movement sequences required in the production of sounds. Although motor learning research is well established, little has been done to determine how the approach changes the underlying physiology of articulatory movements...
May 21, 2018: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/29780838/association-of-compartmental-bone-bruise-distribution-with-concomitant-intra-articular-and-extra-articular-injuries-in-acute-anterior-cruciate-ligament-tears-after-noncontact-sports-trauma
#6
Palaniswamy Aravindh, Tianyi Wu, Chloe Xiaoyun Chan, Keng Lin Wong, Lingaraj Krishna
Background: Anterior cruciate ligament (ACL) injuries are frequently associated with bone bruises, and their presence may be associated with concomitant intra- and extra-articular injuries. Purpose: To investigate the prevalence and pattern of distribution of bone bruises in patients with acute ACL tears from noncontact sports trauma and their association with specific intra- and extra-articular injuries. Study Design: Cross-sectional study; Level of evidence, 3...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29780615/feasibility-of-synthetic-mri-in-knee-imaging-in-routine-practice
#7
Sana Boudabbous, Angeliki Neroladaki, Ilias Bagetakos, Marion Hamard, Bénédicte Ma Delattre, Maria Isabel Vargas
Background: Synthetic magnetic resonance (MR) is a method allowing reduction of examination time and access to quantitative imaging. Purpose: This study sought to assess the image quality and diagnostic accuracy of synthetic magnetic resonance imaging (MRI) compared to standard MRI in patients with knee pain. Material and Methods: In total, 22 patients underwent standard 1.5 knee MRI with an added synthetic sequence. Quantitative T1, T2, and proton density (PD) images were generated synthetically; T1, PD, and short tau inversion recovery (STIR) weighted images were created with chosen echo time (TE), repetition time (TR), and inversion time (TI)...
May 2018: Acta Radiologica Open
https://www.readbyqxmd.com/read/29776813/unicompartmental-knee-arthroplasty-for-spontaneous-osteonecrosis-of-the-medial-tibial-plateau
#8
Tomoyuki Kamenaga, Takafumi Hiranaka, Yuichi Hida, Takaaki Fujishiro, Koji Okamoto
BACKGROUND: There have been very few reports on isolated medial tibial plateau osteonecrosis, and the condition has not been clearly described. Unicompartmental knee arthroplasty (UKA) may be an appropriate treatment method for this condition. The aims of this study were to report our experience of using mobile-bearing knee implants for osteonecrosis of the medial tibial plateau and to discuss the etiology and treatment of this type of osteonecrosis. METHODS: This study included six consecutive patients with isolated medial tibial plateau osteonecrosis treated with an Oxford mobile-bearing knee implant...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29775918/determining-gender-by-taking-measurements-from-magnetic-resonance-images-of-the-patella
#9
Hacer Yasar Teke, Özge Ünlütürk, Elif Günaydin, Semra Duran, Sait Özsoy
BACKGROUND: A key step in making a positive identification in forensic medicine is the establishment of a biological profile, which involves determining factors such as gender, age, ancestry, and stature. The goal of this study was to determine if gender could be established by taking various measurements of the patella taken from magnetic resonance imaging (MRI) images and analyzing the variations by gender. METHODS: The sample group consisted of 220 patients (110 male and 110 female) whose patella were measured using MRI images of their left knee...
May 8, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29775733/association-of-childhood-adiposity-measures-with-adulthood-knee-cartilage-defects-and-bone-marrow-lesions-a-25-year-cohort-study
#10
Tao Meng, Shaun Thayer, Alison Venn, Feitong Wu, Flavia Cicuttini, Lyn March, Terence Dwyer, Andrew Halliday, Marita Cross, Laura L Laslett, Graeme Jones, Changhai Ding, Benny Antony
OBJECTIVE: To describe the associations between childhood adiposity measures and adulthood knee cartilage defects and bone marrow lesions (BMLs) measured 25 years later. METHODS: 327 participants from the Australian Schools Health and Fitness Survey of 1985 (aged 7-15 years) were followed up 25 years later (aged 31-41 years). Childhood measures (weight, height and skinfolds) were collected in 1985. Body mass index (BMI), overweight status and fat mass were calculated...
May 15, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29774597/assessment-of-the-generalization-of-learned-image-reconstruction-and-the-potential-for-transfer-learning
#11
Florian Knoll, Kerstin Hammernik, Erich Kobler, Thomas Pock, Michael P Recht, Daniel K Sodickson
PURPOSE: Although deep learning has shown great promise for MR image reconstruction, an open question regarding the success of this approach is the robustness in the case of deviations between training and test data. The goal of this study is to assess the influence of image contrast, SNR, and image content on the generalization of learned image reconstruction, and to demonstrate the potential for transfer learning. METHODS: Reconstructions were trained from undersampled data using data sets with varying SNR, sampling pattern, image contrast, and synthetic data generated from a public image database...
May 17, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29772990/the-effects-of-meniscal-geometry-on-susceptibility-for-meniscal-and-acl-injury-in-non-arthritic-knees-a-retrospective-case-control-study
#12
Alexander Tejani, Qais Naziri, Preston W Grieco, Robert Pivec, Damon Greene, Bhaveen V Kapadia, Dipal Chatterjee, William P Urban
Prior studies have not found significant differences in meniscal parameters between patients with meniscal and ligamentous injury and those without. The purpose of this study was to determine whether such relationships exist. Clinical records and magnetic resonance images of three subject groups were reviewed. Group 1 solely had meniscal tears (medial/lateral), Group 2 had meniscal tears with concurrent ACL tears, and Group 3 had healthy knees. The mean age of subjects included was 35.9 years (range 8.2-72...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29772342/is-local-or-central-adiposity-more-strongly-associated-with-incident-knee-osteoarthritis-than-the-body-mass-index-in-men-or-women
#13
Adam G Culvenor, David T Felson, Wolfgang Wirth, Torben Dannhauer, Felix Eckstein
OBJECTIVE: To determine whether central (abdominal) or peripheral (thigh) adiposity measures are associated with incident radiographic knee osteoarthritis (RKOA) independent of body mass index (BMI) and whether their relation to RKOA was stronger than that of BMI. DESIGN: 161 Osteoarthritis Initiative participants (62% female) with incident RKOA (Kellgren/Lawrence grade 0/1 at baseline, developing an osteophyte and joint space narrowing grade ≥1 by year-4) were matched to 186 controls (58% female) without incident RKOA...
May 14, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29770851/synovitis-of-the-knee-following-a-high-pressure-injection-injury-with-hydraulic-oil
#14
Paulo A Noronha, Ronaldo O Lomelino, Vanessa Dinoá, Edson Marchiori
High-pressure injection injuries occur when equipment capable of achieving high pressure injects its contents into the human body. These injuries are largely occupational and may present as small entrance wounds with very few symptoms. However, they represent a surgical emergency, often requiring amputation. They characteristically involve the upper extremities, but other regions of the body may be injured. We present the case of a 26-year-old man who sustained a high-pressure injection injury with hydraulic oil to the knee and a literature review of this type of accident...
May 17, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29770503/a-novel-phase-unwrapping-method-by-using-phase-jump-detection-and-local-surface-fitting-application-to-dixon-water-fat-mri
#15
Junying Cheng, Jijing Guan, Yingjie Mei, Lin Xu, Xiaoyun Liu, Qianjin Feng, Wufan Chen, Yanqiu Feng
PURPOSE: This study aims to develop an accurate and robust phase-unwrapping method that works effectively under severe noise, rapid-varying phase, and disconnected regions for water-fat Dixon MRI. METHODS: The proposed method first segments the phase map into blocks by automatically detecting phase jumps, and then clusters the pixels near phase jumps into residual pixels. Thereafter, the proposed method sequentially performs intrablock, interblock, and residual-pixel unwrapping using the local surface fitting approach...
May 16, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29770332/incidence-and-extent-of-graft-extrusion-following-meniscus-allograft-transplantation
#16
REVIEW
Dae-Hee Lee
Background: The incidence and extent of graft extrusion after meniscus allograft transplantation (MAT) may differ in patients undergoing medial and lateral meniscus transplantation due to the use of different surgical techniques. This meta-analysis was therefore designed to quantify the extent and incidence of graft extrusion after meniscus allograft transplantation. Methods: Following preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, all studies reporting absolute extrusion, relative percentage of extrusion (RPE), or frequency of major extrusions (>3 mm) on magnetic resonance imaging in patients undergoing medial or lateral MAT were included...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29769051/knee-dgemric-at-7-t-comparison-against-1-5-t-and-evaluation-of-t-1-mapping-methods
#17
Pernilla Peterson, Carl Johan Tiderius, Emma Olsson, Björn Lundin, Lars E Olsson, Jonas Svensson
BACKGROUND: dGEMRIC (delayed Gadolinium Enhanced Magnetic Resonance Image of Cartilage) is a well-established technique for cartilage quality assessment in osteoarthritis at clinical field strengths. The method is robust, but requires injection of contrast agent and a cumbersome examination procedure. New non-contrast-agent-based techniques for cartilage quality assessment are currently being developed at 7 T. However, dGEMRIC remains an important reference technique during this development...
May 16, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29766258/treatment-of-osteochondral-defects-with-a-combination-of-bone-grafting-and-amic-technique
#18
Arnd Hoburg, Julia Marcella Leitsch, Gerd Diederichs, Rex Lehnigk, Carsten Perka, Roland Becker, Sven Scheffler
INTRODUCTION: Osteochondral defects of the knee may cause functional impairment of young and sportively active patients. Different surgical treatment options have been proposed using either one or two step procedures. The aim of the current study was to evaluate mid-term outcomes of combined bone grafting with autologous matrix-associated chondrogenesis (AMIC) for the treatment of large osteochondral defects. MATERIALS AND METHODS: 15 Patients with osteochondrosis dissecans of the medial femoral condyle grade III or IV according to ICRS classification were treated with a single step surgical procedure combining bone grafting and the AMIC procedure...
May 15, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29766248/imaging-of-the-knee-in-juvenile-idiopathic-arthritis
#19
REVIEW
Robert Hemke, Nikolay Tzaribachev, Anouk M Barendregt, J Merlijn van den Berg, Andrea S Doria, Mario Maas
In juvenile idiopathic arthritis (JIA), imaging is increasingly used in clinical practice. In this paper we discuss imaging of the knee, the clinically most commonly affected joint in JIA. In the last decade, a number of important steps have been made in the development of imaging outcome measures in children with JIA knee involvement. Ultrasound is undergoing a fast validation process, which should be accomplished within the next few years. The validation processes of MRI as an imaging biomarker for clinical trials in the JIA knee are at an advanced stage, with important data available on the feasibility, reliability and validity of the Juvenile Arthritis MRI Scoring system...
June 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29762121/friction-syndromes-of-the-knee-the-iliotibial-band-and-anterior-fat-pads
#20
Robert D Wissman, Stephen J Pomeranz
As participation in sporting activities increases among the general population, the incidence of overuse injuries continues to rise. Friction syndromes of the knee are common and are often clinically diagnosed without the need for imaging. However, clinical symptoms may overlap with other joint abnormalities, and physical examination may be limited in individuals with excessive pain. Magnetic resonance imaging has remained the modality of choice for the evaluation of internal derangements of the joints and is a useful aid in the diagnosis of friction syndrome of the knee...
2018: Journal of Surgical Orthopaedic Advances
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