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orthopedic MRI

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https://www.readbyqxmd.com/read/28479059/comparison-of-pre-revision-magnetic-resonance-imaging-and-operative-findings-in-mechanically-assisted-crevice-corrosion-in-symptomatic-metal-on-polyethylene-total-hip-arthroplasties
#1
Pavel P Morozov, Munib Sana, Brian J McGrory, Steven W Farraher, Tod G Abrahams
BACKGROUND: Failed total hip arthroplasty (THA) caused by mechanically assisted crevice corrosion (MACC) has serious consequences-notably, adverse local tissue reactions. Metal artifact reduction sequence (MARS) magnetic resonance imaging (MRI) has been used to evaluate failed THA for other reasons but has not been assessed for the analysis of cases of MACC in the setting of metal-on-polyethylene arthroplasties. METHODS: We examined the correlation between preoperative MARS MRI and surgical findings in a cohort of 20 consecutive patients undergoing revision THA for symptomatic MACC without other associated orthopedic diagnoses...
March 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28460411/initial-assessment-and-implications-for-surgery-the-missed-diagnosis-of-irreducible-knee-dislocation
#2
Bin Xu, Honggang Xu, Jun Tu, Ruipeng Guo
Irreducible knee dislocation is a rare but devastating orthopedic emergency. Limited discussion about its characteristics has been undertaken due to its low incidence. The purpose of this study was to present a series of irreducible dislocated knees and cumulatively reviewed all existing publications in this filed. A retrospective case series study was undertaken in patients with irreducible knee dislocation. Patients' data were carefully collected and presented. Historical cases of irreducible knee dislocation in published papers were reviewed, and their diagnosis, treatment, and prognosis were summarized...
May 1, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28458897/armc5-mutation-in-a-portuguese-family-with-primary-bilateral-macronodular-adrenal-hyperplasia-pbmah
#3
Teresa Rego, Fernando Fonseca, Stéphanie Espiard, Karine Perlemoine, Jérôme Bertherat, Ana Agapito
SUMMARY: PBMAH is a rare etiology of Cushing syndrome (CS). Familial clustering suggested a genetic cause that was recently confirmed, after identification of inactivating germline mutations in armadillo repeat-containing 5 (ARMC5) gene. A 70-year-old female patient was admitted due to left femoral neck fracture in May 2014, in Orthopedics Department. During hospitalization, hypertension (HTA) and hypokalemia were diagnosed. She presented with clinical signs of hypercortisolism and was transferred to the Endocrinology ward for suspected CS...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28443160/correlation-between-preoperative-magnetic-resonance-imaging-signal-intensity-changes-and-clinical-outcomes-in-patients-surgically-treated-for-cervical-myeloradiculopathy
#4
Chaitanya Baban Chikhale, Ketan Shripad Khurjekar, Ashok Kumar Shyam, Parag Kantilal Sancheti
STUDY DESIGN: This was a single surgeon, single center-based retrospective study with prospective data collection. PURPOSE: To assess the correlation between T2-weighted magnetic resonance imaging (MRI) signal intensity (SI) changes and factors such as age, duration of symptoms, baseline modified Japanese Orthopedic Association (mJOA) score and to determine its prognostic value in predicting recovery after surgery. OVERVIEW OF LITERATURE: Whether intramedullary cord T2-weighted MRI SI changes can predict operative outcomes of cervical myeloradiculopathy remains debatable, with only a few prospective studies analyzing the same...
April 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28437550/use-of-magnetic-resonance-imaging-to-predict-quadrupled-semitendinosus-graft-diameter-in-all-inside-anterior-cruciate-ligament-reconstruction
#5
Joseph Serino, Ryan Murray, Evan H Argintar
This study was conducted to evaluate whether preoperative magnetic resonance imaging (MRI) measurements of the cross-sectional area and length of the semitendinosus tendon correlated with graft diameter. The goal of the study was to identify tendons at risk for requiring graft augmentation. The records of 140 consecutive patients undergoing anterior cruciate ligament (ACL) reconstruction between 2013 and 2016 were examined retrospectively. The study included 39 patients who underwent all-inside ACL reconstruction with a semitendinosus autograft...
April 24, 2017: Orthopedics
https://www.readbyqxmd.com/read/28434847/mri-before-radiography-for-patients-with-new-shoulder-conditions
#6
Kirstin M Small, Frank J Rybicki, Lindsay R Miller, Stephen D Daniels, Laurence D Higgins
PURPOSE: To assess the patterns of Appropriate Criteria application among orthopedic specialists and other fields of medicine for use of MRI and radiography and the subsequent necessity for surgical intervention. METHODS: The hospital electronic medical record was used to identify all shoulder MRI studies at a single large urban teaching hospital between January 2, 2011, and June 30, 2011. For each study, variables collected included ordering department, patient age, patient gender, patient's self-reported race/ethnicity, whether the patient obtained surgery for an issue related to the MRI diagnosis, the type of MRI ordered, the date of pain onset, the date of x-ray (if any), and the date of the MRI...
April 20, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28428212/a-novel-mri-biomarker-of-spinal-cord-white-matter-injury-t2-weighted-white-matter-to-gray-matter-signal-intensity-ratio
#7
A R Martin, B De Leener, J Cohen-Adad, D W Cadotte, S Kalsi-Ryan, S F Lange, L Tetreault, A Nouri, A Crawley, D J Mikulis, H Ginsberg, M G Fehlings
BACKGROUND AND PURPOSE: T2*-weighted imaging provides sharp contrast between spinal cord GM and WM, allowing their segmentation and cross-sectional area measurement. Injured WM demonstrates T2*WI hyperintensity but requires normalization for quantitative use. We introduce T2*WI WM/GM signal-intensity ratio and compare it against cross-sectional area, the DTI metric fractional anisotropy, and magnetization transfer ratio in degenerative cervical myelopathy. MATERIALS AND METHODS: Fifty-eight patients with degenerative cervical myelopathy and 40 healthy subjects underwent 3T MR imaging, covering C1-C7...
April 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28427416/shoulder-ultrasonography-performed-by-orthopedic-surgeons-increases-efficiency-in-diagnosis-of-rotator-cuff-tears
#8
Chih-Hao Chiu, Poyu Chen, Alvin Chao-Yu Chen, Kuo-Yao Hsu, Shih-Sheng Chang, Yi-Sheng Chan, Yeung-Jen Chen
BACKGROUND: Rotator cuff tears are very common and their incidence increases with age. Shoulder ultrasonography has recently gained popularity in detecting rotator cuff tears because of its efficiency, cost-effectiveness, time-saving, and real-time nature of the procedure. Well-trained orthopedic surgeons may utilize shoulder ultrasonography to diagnose rotator cuff tears. The wait time of patients planned to have shoulder MRI (magnetic resonance imaging) to rule in rotator cuff tears may decrease after orthopedic surgeon start doing shoulder ultrasonography as a screening tool for that...
April 20, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28427393/correlation-between-intervertebral-disc-degeneration-paraspinal-muscle-atrophy-and-lumbar-facet-joints-degeneration-in-patients-with-lumbar-disc-herniation
#9
Dong Sun, Peng Liu, Jie Cheng, Zikun Ma, Jingpei Liu, Tingzheng Qin
BACKGROUND: To assess the correlation between lumbar disc degeneration (LDD), multifidus muscle atrophy (LMA), and facet joints degeneration in patients with L4-L5 lumbar disc herniation (LDH). METHODS: Sixty patients with L4-L5 LDH diagnosed by a 1.5 T MRI scanner were enrolled in the study group and another 60 patients with non-specific back pain were enrolled in the control group. LDD, LMA, and facet joints degeneration were examined and analyzed independently by two independent orthopedic surgeons using T2-weighted images...
April 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28419612/delayed-gadolinium-enhanced-mri-of-cartilage-dgemric-and-t2-mapping-of-talar-osteochondral-lesions-indicators-of-clinical-outcomes
#10
Christoph Rehnitz, Benita Kuni, Felix Wuennemann, Dimitrios Chloridis, Anand Kirwadi, Iris Burkholder, Hans-Ulrich Kauczor, Marc-André Weber
PURPOSE: To evaluate the utility of delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) and T2 mapping in evaluation of type II osteochondral lesions (OCLs) of the talus and define cutoff values for identifying patients with good/poor clinical outcomes. MATERIALS AND METHODS: 28 patients (mean age, 42.3 years) underwent T2 mapping and dGEMRIC at least 1.5 years (mean duration, 3.5 years) after microfracture (n = 12) or conservative (n = 16) treatment for type II OCL...
April 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28414677/a-rare-case-of-tropical-pyomysitis-acquired-on-vacation-in-a-healthy-male
#11
K Poole, T Tran
INTRODUCTION: Pyomyositis has traditionally been considered a tropical disease. Increasing prevalence has been observed in more northern climates, especially with HIV, immunosuppression, and IV drug abuse as predisposing factors. Pyomyositis has the tendency to mimic other conditions, such as muscle contusion, necrotizing fasciitis, or septic arthritis. The rarity of this disease and non-specificity of its symptoms often lead to delay in appropriate diagnosis and treatment. CASE: 24-year-old man, seen 2 days prior in orthopedics clinic and the Emergency Department for persistent gluteal pain thought to be due to right-sided sciatica, was admitted following worsening pain, diffuse generalized weakness with polyarthralgias and myalgias These symptoms were associated with night sweats, shaking chills, and difficulty walking...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28397048/spontaneous-cervical-epidural-hematomas-in-mild-cervical-spondylotic-myelopathy-patients-an-analysis-of-8-cases
#12
Si-Cheng Tang, Yan Wang, Yu Wang, Lei Yang, Jun Chen
Spontaneous cervical epidural hematoms (SCEH) complicated with mild cervical spondylotic myelopathy (CSM) is a rare but emerging condition. Early diagnosis and treatment are important for good outcomes. This study aimed to investigate the clinical characteristics of this condition and to discuss the optimal treatment. The clinical data from 8 patients with SCEH plus CSM who were divided into two groups by treatment methods were retrospectively analyzed. The neurological function of the patients was assessed by Japanese Orthopedic Association (JOA) score before and after the surgical operations...
April 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28355743/-topping-off-surgery-versus-double-segment-fusion-for-treatment-of-lumbar-degenerative-disease-with-mid-long-term-follow-up
#13
X L Chen, Y Hai, L Guan, Y Z Liu, J C Yang, Q J Su, N Kang, X L Meng, L Yang, Y Wang
Objective: To compare the mid-long term clinical effect of Topping-off surgery and lumbar fusion surgery for two-segmental lumbar degenerative disease. Methods: From March 2009 to March 2012, one hundred and twenty-six consecutive patients (Topping-off surgery and two-segment PLIF surgery) were studied in Orthopedics Department, Beijing Chao-Yang Hospital, Capital Medical University.The VAS and ODI were used to assess clinical symptoms.All patients underwent flexion/extension radiographs examinations before surgery, 1, 2 years and last follow-up postoperatively...
March 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28345126/open-door-laminoplasty-with-preservation-of-muscle-attachments-of-c2-and-c7-for-cervical-spondylotic-myelopathy-retrospective-study
#14
Halil Ibrahim Secer, Ferhat Harman, Murat Hamit Aytar, Serdar Kahraman
AIM: Some restriction and complications, such as progression of kyphosis, incidence of axial neck pain and decrease of postoperative cervical range of motion are concern. We designed this retrospective clinical study to evaluate the effect of laminoplasty by preserving the muscle attachments of C2 and C7 spinous processes on ROM, axial neck pain and cervical lordosis. MATERIAL AND METHODS: 27 cases with cervical spondylotic myelopathy underwent open-door laminoplasty with the protection of the muscles attachment to the C2 and C7 spinous process and laminae between 2007 and 2013...
February 27, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28342291/advances-in-mri-around-metal
#15
REVIEW
Pia M Jungmann, Christoph A Agten, Christian W Pfirrmann, Reto Sutter
The prevalence of orthopedic metal implants is continuously rising in the aging society. Particularly the number of joint replacements is increasing. Although satisfying long-term results are encountered, patients may suffer from complaints or complications during follow-up, and often undergo magnetic resonance imaging (MRI). Yet metal implants cause severe artifacts on MRI, resulting in signal-loss, signal-pileup, geometric distortion, and failure of fat suppression. In order to allow for adequate treatment decisions, metal artifact reduction sequences (MARS) are essential for proper radiological evaluation of postoperative findings in these patients...
March 25, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28342107/interactive-segmentation-in-mri-for-orthopedic-surgery-planning-bone-tissue
#16
Firat Ozdemir, Neerav Karani, Philipp Fürnstahl, Orcun Goksel
PURPOSE: Planning orthopedic surgeries is commonly performed in computed tomography (CT) images due to the higher contrast of bony structure. However, soft tissues such as muscles and ligaments that may determine the functional outcome of a procedure are not easy to identify in CT, for which fast and accurate segmentation in MRI would be desirable. To be usable in daily practice, such method should provide convenient means of interaction for modifications and corrections, e.g., during perusal by the surgeon or the planning physician for quality control...
March 24, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28336447/anatomical-reconstruction-of-the-fourth-brachymetatarsia-with-one-stage-iliac-bone-and-cartilage-cap-grafting
#17
Sang Hyun Woo, Chi Young Bang, Hee-Chan Ahn, Sung-Jung Kim, Jun-Young Choi
BACKGROUND: We present a one-stage procedure for lengthening the fourth brachymetatarsia with autogenous iliac bone and cartilage cap grafting for the anatomical reconstruction of the metatarsophalangeal (MTP) joint METHODS: During the last 8 years, 56 feet in 41 patients with congenital brachymetatarsia of the fourth toe were corrected with a one-stage operation to reposition the articular cartilage cap to the distal part of interpositional iliac bone graft at the metatarsal epiphysis...
May 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28306556/metal-artifact-reduction-in-mri-based-cervical-cancer-intracavitary-brachytherapy
#18
Yuan James Rao, Jacqueline E Zoberi, Mo Kadbi, Perry W Grigsby, Jochen Cammin, Stacie L Mackey, Jose Garcia-Ramirez, S Murty Goddu, Julie K Schwarz, H Michael Gach
Magnetic resonance imaging (MRI) plays an increasingly important role in brachytherapy planning for cervical cancer. Yet, metal tandem, ovoid intracavitary applicators, and fiducial markers used in brachytherapy cause magnetic susceptibility artifacts in standard MRI. These artifacts may impact the accuracy of brachytherapy treatment and the evaluation of tumor response by misrepresenting the size and location of the metal implant, and distorting the surrounding anatomy and tissue. Metal artifact reduction sequences (MARS) with high bandwidth RF selective excitations and turbo spin-echo readouts were developed for MRI of orthopedic implants...
April 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28290939/susceptibility-weighted-imaging-and-white-matter-abnormality-findings-in-service-members-with-persistent-cognitive-symptoms-following-mild-traumatic-brain-injury
#19
David F Tate, Maria Gusman, Jonathan Kini, Matthew Reid, Carmen S Velez, Ann Marie Drennon, Douglas B Cooper, Jan E Kennedy, Amy O Bowles, Erin D Bigler, Jeffrey D Lewis, John Ritter, Gerald E York
Mild traumatic brain injury (mTBI) is a major health concern among active duty service members and Veterans returning from combat operations, and it can result in variable clinical and cognitive outcomes. Identifying biomarkers that can improve diagnosis and prognostication has been at the forefront of recent research efforts. The purpose of this study was to compare the sensitivity and specificity of abnormalities identified using more traditional magnetic resonance imaging (MRI) sequences such as fluid attenuation inversion recovery (FLAIR) to more advanced MRI sequences such as susceptibility weighted imaging (SWI) among a cohort of active duty service members experiencing persistent cognitive symptoms after mTBI...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28259264/mri-screening-in-operative-scheuermann-kyphosis-is-it-necessary
#20
Baron S Lonner, Courtney S Toombs, Michael Mechlin, Gina Ciavarra, Suken A Shah, Amer F Samdani, Paul Sponseller, Harry L Shufflebarger, Randal R Betz, Burt Yaszay, Peter O Newton
STUDY DESIGN: Patients with preoperative spine magnetic resonance imaging (MRI) studies from a prospective multicenter study of operative adolescent Scheuermann kyphosis (SK). OBJECTIVES: To investigate the usefulness of MRI screening in operative planning for SK surgeries. SUMMARY OF BACKGROUND DATA: Neural axis abnormalities in operative SK have not been previously studied with MRI screening, despite its use. METHODS: One orthopedic surgeon and two radiologists evaluated all images retrospectively...
March 2017: Spine Deformity
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