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Hip MRI

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https://www.readbyqxmd.com/read/28100198/mr-imaging-for-detection-of-trampoline-injuries-in-children
#1
E Hauth, H Jaeger, P Luckey, M Beer
BACKGROUND: The recreational use of trampolines is an increasingly popular activity among children and adolescents. Several studies reported about radiological findings in trampoline related injuries in children. The following publication presents our experience with MRI for detection of trampoline injuries in children. METHODS: 20 children (mean 9.2 years, range: 4-15 years) who had undergone an MRI study for detection of suspected trampoline injuries within one year were included...
January 18, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28090448/quantitative-techniques-for-musculoskeletal-mri-at-7-tesla
#2
REVIEW
Neal K Bangerter, Meredith D Taylor, Grayson J Tarbox, Antony J Palmer, Daniel J Park
Whole-body 7 Tesla MRI scanners have been approved solely for research since they appeared on the market over 10 years ago, but may soon be approved for selected clinical neurological and musculoskeletal applications in both the EU and the United States. There has been considerable research work on musculoskeletal applications at 7 Tesla over the past decade, including techniques for ultra-high resolution morphological imaging, 3D T2 and T2* mapping, ultra-short TE applications, diffusion tensor imaging of cartilage, and several techniques for assessing proteoglycan content in cartilage...
December 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28088837/disease-severity-classification-using-quantitative-magnetic-resonance-imaging-data-of-cartilage-in-femoroacetabular-impingement
#3
Lisa L Henn, John Hughes, Eleena Iisakka, Jutta Ellermann, Shabnam Mortazavi, Connor Ziegler, Mikko J Nissi, Patrick Morgan
Femoroacetabular impingement (FAI) is a condition in which subtle deformities of the femoral head and acetabulum (hip socket) result in pathological abutment during hip motion. FAI is a common cause of hip pain and can lead to acetabular cartilage damage and osteoarthritis. For some patients with FAI, surgical intervention is indicated, and it can improve quality of life and potentially delay the onset of osteoarthritis. For other patients, however, surgery is contraindicated because significant cartilage damage has already occurred...
January 15, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28087160/mri-retrieval-analysis-and-histologic-evaluation-of-adverse-local-tissue-reaction-in-metal-on-polyethylene-total-hip-arthroplasty
#4
Scott R Nodzo, Christina I Esposito, Hollis G Potter, Chitranjan S Ranawat, Timothy M Wright, Douglas E Padgett
BACKGROUND: The severity and location of adverse local tissue reaction (ALTR) seen in metal-on-polyethylene total hip arthroplasty (THA) is not well described. METHODS: We retrospectively reviewed the records of patients who underwent a revision THA using our biomechanics database. We included all patients who underwent revision surgery for the diagnosis of ALTR with THA implants that had modularity solely at the head-neck junction and excluded patients with implant modularity at sites other than the head-neck junction...
December 8, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28060181/predicting-periarticular-infection-in-children-with-septic-arthritis-of-the-hip-regionally-derived-criteria-may-not-apply-to-all-populations
#5
Christian A Refakis, Alexandre Arkader, Keith D Baldwin, David A Spiegel, Wudbhav N Sankar
BACKGROUND: The management of septic arthritis of the hip in children can be complicated by the presence of additional coexisting periarticular infections (PAIs). Criteria predicting the presence of PAI have recently been proposed by Rosenfeld and colleagues with the goal of using magnetic resonance imaging (MRI) efficiently in the workup of septic arthritis. The purpose of this study was to determine the applicability of recently published predictive criteria for PAI (developed in the Southwestern United States using a variety of joints) to septic arthritis of the hip treated at a large Northeastern tertiary care center...
January 5, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28058477/elastofibroma-of-the-gluteal-region-with-a-concomitant-contralateral-lesion-case-report-and-review-of-the-literature
#6
Luca Cevolani, R Casadei, D Vanel, M Gambarotti, D Donati
A 51-year-old man presented with elastofibroma (EF) of the gluteal region with a concomitant contralateral lesion. The patient presented with a slow growing mass of the proximal third of the right buttock and had swelling, discomfort in sitting, and right-hip pain during walking for 2 months. On MRI, a soft-tissue mass was noted between the gluteus maximus and the gluteus medius muscle. The mass showed similar signal intensity to the surrounding tissue on T1- and T2-weighted images and with linear hyperintense areas in its internal structure...
January 5, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28051983/rapid-magnetic-resonance-imaging-evaluation-of-femoral-neck-stress-fractures-in-a-u-s-active-duty-military-population
#7
Lauren A May, Dillon C Chen, Liem T Bui-Mansfield, Seth D O'Brien
OBJECTIVES: Timely diagnosis of femoral neck stress fractures is important to prevent fracture completion and displacement. We hypothesize that an abbreviated magnetic resonance imaging (MRI) hip examination can diagnose femoral neck stress fractures and that femoral neck stress fractures are common in U.S. military recruits. METHODS: We retrospectively reviewed abbreviated hip MRI examinations performed on active duty patients from November 1, 2013, to August 5, 2014...
January 2017: Military Medicine
https://www.readbyqxmd.com/read/28048696/mo-fg-campus-iep3-01-evaluation-of-specific-absorption-rate-and-temperature-increase-induced-by-artificial-medical-implants-during-mri-scan
#8
Y Seo
PURPOSE: Heating of patients or burning of biological tissues around medical implants by RF power during MRI scan is a significant patient safety concern. The purpose of this study is to not only measure SAR values, but also RF-induced temperature elevation due to artificial hip joints during MRI scans. METHODS: SAR measurement experiment was performed on three discrete manufacturers at 1.5 and 3T. Three MRI RF sequences (T1w TSE, T2w inversion recovery, and T2w TSE) with imaging parameters were selected...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048362/su-f-j-161-prostate-contouring-in-patients-with-bilateral-hip-prostheses-impact-of-using-artifact-reduced-ct-images-and-mri
#9
A Elzibak, A Loblaw, G Morton, D Vesprini, S Liu, H Chung, M Davidson
PURPOSE: To investigate the usefulness of metal artifact reduction in CT images of patients with bilateral hip prostheses (BHP) for contouring the prostate and determine if the inclusion of MR images provides additional benefits. METHODS: Five patients with BHP were CT scanned using our clinical protocol (140kV, 300mAs, 3mm slices, 1.5mm increment, Philips Medical Systems, OH). Images were reconstructed with the orthopaedic metal artifact reduction (O-MAR) algorithm...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046603/su-f-t-374-dosimetric-effects-of-irradiation-through-a-bilateral-hip-prosthesis-in-a-mri-linac
#10
M Wronski, S Ahmad, A Sarfehnia, A Sahgal, B Keller
PURPOSE: To evaluate the interface effects when irradiating through a hip prosthesis in the presence of an orthogonal 1.5 T magnetic field using Monte Carlo simulations. METHODS: A 20×20×38 cm virtual phantom with two 5×5×5 cm sections of bilateral titanium hip prosthesis was created in GPU-based Monte Carlo (MC) algorithm (GPUMCD, Elekta AB, Stockholm Sweden). The lateral prosthesis spacing was based on a representative patient CT scan. A treatment SAD of 143...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28035445/effect-of-progressive-high-impact-exercise-on-femoral-neck-structural-strength-in-postmenopausal-women-with-mild-knee-osteoarthritis-a-12-month-rct
#11
J Multanen, T Rantalainen, H Kautiainen, R Ahola, T Jämsä, M T Nieminen, E Lammentausta, A Häkkinen, I Kiviranta, A Heinonen
: It is uncertain whether subjects with mild knee osteoarthritis, and who may be at risk of osteoporosis, can exercise safely with the aim of improving hip bone strength. This RCT showed that participating in a high-impact exercise program improved femoral neck strength without any detrimental effects on knee cartilage composition. INTRODUCTION: No previous studies have examined whether high-impact exercise can improve bone strength and articular cartilage quality in subjects with mild knee osteoarthritis...
December 29, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/28033218/avascular-necrosis-of-the-hips-with-increased-activity-on-68ga-dotatate-pet-ct
#12
Georgios Z Papadakis, Corina Millo, Apostolos H Karantanas, Ulas Bagci, Nicholas J Patronas
Prolonged exposure to cortisol is one of the major causes of avascular bone necrosis (AVN). We report on a case of a woman with Cushing syndrome attributed to ectopic adrenocorticotropic hormone-secreting tumor who was evaluated with whole-body PET/CT study using Ga-DOTATATE. The scan showed increased activity by both femoral heads, corresponding to the margins of bilateral AVN seen on MRI. The presented data suggests AVN-induced reactive inflammatory alterations adjacent to the necrotic segment of the bone, which can be effectively targeted using radiolabeled somatostatin (SST) analogs...
December 28, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28028160/predictive-value-of-mri-features-for-development-of-radiographic-osteoarthritis-in-a-cohort-of-participants-with-pre-radiographic-knee-osteoarthritis-the-check-study
#13
Kim van Oudenaarde, Björn Jobke, Ans C M Oostveen, Annekarien C A Marijnissen, Ron Wolterbeek, Janet Wesseling, Sita M A Bierma-Zeinstra, Hans L Bloem, Monique Reijnierse, Margreet Kloppenburg
OBJECTIVE: To determine whether MRI features are associated with development of radiographic knee OA and can be used as a predictive tool in early knee OA. METHODS: In 148 participants of the Cohort Hip and Cohort Knee study (mean age 56 years, 78% women), with a Kellgren Lawrence (KL) score ⩽1, we obtained semi-quantitatively scored knee MRI scans and radiographs at baseline. After 5 years, we determined the development of radiographic knee OA (KL ⩾2). We calculated odds ratios (ORs), with 95% CIs adjusted for age, sex and BMI, to identify MRI features associated with OA development...
January 2017: Rheumatology
https://www.readbyqxmd.com/read/28018077/hip-adductor-pyomyositis-from-streptococcus-mitis-in-a-four-year-old-child
#14
Metin Tolga Buldu, Raghu Raman
: The unique aspect of this case study is the unusual history, presentation, ultrasonography, MRI and blood culture results, which lead to the diagnosis and treatment of adductor pyomyositis with a rare organism in a temperate country. The patient presented with a one-day history of malaise, fever, left groin pain and inability to weight bear on the left leg. There was no history of any trauma, predisposing infections or recent travel. Plain radiograph and ultrasound of the hip was normal with no effusion...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28006992/increasing-hip-and-knee-flexion-during-a-drop-jump-task-reduces-tibiofemoral-shear-and-compressive-forces-implications-for-acl-injury-prevention-training
#15
Liang-Ching Tsai, Yi-An Ko, Kyle E Hammond, John W Xerogeanes, Gordon L Warren, Christopher M Powers
Although most ACL injury prevention programmes encourage greater hip and knee flexion during landing, it remains unknown how this technique influences tibiofemoral joint forces. We examined whether a landing strategy utilising greater hip and knee flexion decreases tibiofemoral anterior shear and compression. Twelve healthy women (25.9 ± 3.5 years) performed a drop-jump task before and after a training session (10-15 min) that emphasised greater hip and knee flexion. Peak tibiofemoral anterior shear and compressive forces were calculated using an electromyography (EMG)-driven knee model that incorporated joint kinematics, EMG and participant-specific muscle volumes and patella tendon orientation measured using magnetic resonance imaging (MRI)...
December 23, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28006109/joint-loading-in-the-sagittal-plane-during-gait-is-associated-with-hip-joint-abnormalities-in-patients-with-femoroacetabular-impingement
#16
Michael A Samaan, Benedikt J Schwaiger, Matthew C Gallo, Kiyoshi Sada, Thomas M Link, Alan L Zhang, Sharmila Majumdar, Richard B Souza
BACKGROUND: Femoroacetabular impingement (FAI) is a morphological abnormality of the hip joint that results in functional impairments during various activities of daily living (ADL) such as walking. Purpose/Hypothesis: The purpose of this study was to determine if lower extremity joint loading differed between patients with FAI and controls and to determine whether these altered biomechanical parameters were associated with intra-articular abnormalities. It was hypothesized that patients with FAI would exhibit altered lower extremity joint loading during walking when compared with healthy controls and that these altered joint loading patterns would be associated with intra-articular abnormalities...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28000006/mri-as-outcome-measure-in-facioscapulohumeral-muscular-dystrophy-1-year-follow-up-of-45-patients
#17
Grete Andersen, Julia R Dahlqvist, Christoffer R Vissing, Karen Heje, Carsten Thomsen, John Vissing
There is no effective treatment available for facioscapulohumeral muscular dystrophy type 1 (FSHD1), but emerging therapies are under way that call for a better understanding of natural history in this condition. In this prospective, longitudinal study, we used quantitative MRI to assess yearly disease progression in patients with FSHD1. Ambulatory patients with confirmed diagnosis of FSHD1 (25/20 men/women, age 20-75 years, FSHD score: 0-12) were tested with 359-560-day interval between tests. Using the MRI Dixon technique, muscle fat replacement was evaluated in paraspinal, thigh, and calf muscles...
December 20, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27992684/hip-shape-as-a-predictor-of-osteoarthritis-progression-in-a-prospective-population-cohort
#18
Harbeer G Ahedi, Richard M Aspden, Leigh C Blizzard, Fiona R Saunders, Flavia M Cicuttini, Dawn A Aitken, Graeme Jones, Jennifer S Gregory
OBJECTIVE: Hip morphology plays a significant role in the incidence and progression of hip osteoarthritis (OA). We hypothesized that hip shape would also associate with other key factors and tested this in a longitudinal community-based cohort combining radiographic, MRI, DXA, and clinical data. METHODS: Baseline dual-energy X-ray absorptiometry (DXA) images of the left hip of 831 subjects from the Tasmanian Older Adult Cohort (TASOAC) were analyzed using an 85-point statistical shape model...
December 19, 2016: Arthritis Care & Research
https://www.readbyqxmd.com/read/27987464/confirming-improved-detection-of-gadolinium-in-bone-using-in-vivo-xrf
#19
M L Lord, F E McNeill, J L Gräfe, A L Galusha, P J Parsons, M D Noseworthy, L Howard, D R Chettle
The safety of using Gd in MRI contrast agents has recently been questioned, due to recent evidence of the retention of Gd in individuals with healthy renal function. Bone has proven to be a storage site for Gd, as unusually high concentrations have been measured in femoral heads of patients undergoing hip replacement surgery, as well as in autopsy samples. All previous measurements of Gd in bone have been invasive and required the bone to be removed from the body. X-ray fluorescence (XRF) offers a non-invasive and non-destructive method for carrying out in vivo measurements of Gd in humans...
February 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/27981665/hip-mri-prevalence-of-articular-cartilage-defects-and-labral-tears-in-asymptomatic-volunteers-a-comparison-with-a-matched-population-of-patients-with-femoroacetabular-impingement
#20
Florian Tresch, Tobias J Dietrich, Christian W A Pfirrmann, Reto Sutter
PURPOSE: To prospectively compare defects of the articular cartilage and labrum in asymptomatic volunteers and in patients with femoroacetabular impingement (FAI) matched for age and gender. MATERIALS AND METHODS: This cross-sectional study was institutional review board approved. A total of 63 asymptomatic volunteers and 63 patients with symptomatic FAI between 20 and 50 years underwent 1.5 Tesla MRI (coronal T1-weighted, coronal intermediate-weighted fat saturated, transverse oblique true fast imaging with steady-state precession [FISP], sagittal dual echo steady state [DESS] sequence)...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
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