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Musculoskeletal imaging

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https://www.readbyqxmd.com/read/28331952/diagnostic-strategies-for-posttraumatic-osteomyelitis-a-survey-amongst-dutch-medical-specialists-demonstrates-the-need-for-a-consensus-protocol
#1
G A M Govaert, A W J M Glaudemans, J J W Ploegmakers, A R Viddeleer, K W Wendt, I H F Reininga
INTRODUCTION: Posttraumatic osteomyelitis (PTO) is a feared complication after surgical fracture care. Late diagnosis can result in interrupted and prolonged rehabilitation programmes, inability to work, medical dependency, unnecessary hospital admissions, and high medical and non-medical costs. Primary aim of this study was to assess preferred diagnostic imaging strategies for diagnosing PTO amongst orthopaedic and trauma surgeons, radiologists, and nuclear medicine physicians. Secondary aims were to determine the preferred serum inflammatory marker for diagnosing PTO and the existence of a local hospital protocol to diagnose and manage PTO...
March 22, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28328692/experience-with-a-care-process-model-in-the-evaluation-of-pediatric-musculoskeletal-infections-in-a-pediatric-emergency-department
#2
Lina Patel, Jeff Michael, Nancy Allen, Lisa Schroeder, Lisa Berglund, Jason G Newland
OBJECTIVES: Care process models (CPMs) for certain conditions have improved clinical outcomes in children. This study describes the implementation and impact of a CPM for the evaluation of musculoskeletal infections in a pediatric emergency department (ED). METHODS: A retrospective pre-post intervention study was performed to analyze the impact of a musculoskeletal infection CPM. Patients were identified retrospectively through electronic order history for imaging of an extremity or joint and recommended laboratory tests...
March 21, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28327586/cellular-preservation-of-musculoskeletal-specializations-in-the-cretaceous-bird-confuciusornis
#3
Baoyu Jiang, Tao Zhao, Sophie Regnault, Nicholas P Edwards, Simon C Kohn, Zhiheng Li, Roy A Wogelius, Michael J Benton, John R Hutchinson
The hindlimb of theropod dinosaurs changed appreciably in the lineage leading to extant birds, becoming more 'crouched' in association with changes to body shape and gait dynamics. This postural evolution included anatomical changes of the foot and ankle, altering the moment arms and control of the muscles that manipulated the tarsometatarsus and digits, but the timing of these changes is unknown. Here, we report cellular-level preservation of tendon- and cartilage-like tissues from the lower hindlimb of Early Cretaceous Confuciusornis...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327471/motion-compensation-in-extremity-cone-beam-ct-using-a-penalized-image-sharpness-criterion
#4
Alejandro Sisniega, Joseph Stayman, John Yorkston, Jeffrey Siewerdsen, Wojciech Zbijewski
Cone-beam CT (CBCT) for musculoskeletal imaging would benefit from a method to reduce the effects of involuntary patient motion. In particular, the continuing improvement in spatial resolution of CBCT may enable tasks such as quantitative assessment of bone microarchitecture (0.1 mm - 0.2 mm detail size), where even subtle, sub-mm motion blur might be detrimental. We propose a purely image based motion compensation method that requires no fiducials, tracking hardware or prior images. A statistical optimization algorithm (CMA-ES) is used to estimate a motion trajectory that optimizes an objective function consisting of an image sharpness criterion augmented by a regularization term that encourages smooth motion trajectories...
March 22, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28321805/introduction-of-a-computer-based-method-for-automated-planning-of-reduction-paths-under-consideration-of-simulated-muscular-forces
#5
Jan Buschbaum, Rainer Fremd, Tim Pohlemann, Alexander Kristen
PURPOSE: Reduction is a crucial step in the surgical treatment of bone fractures. Finding an optimal path for restoring anatomical alignment is considered technically demanding because collisions as well as high forces caused by surrounding soft tissues can avoid desired reduction movements. The repetition of reduction movements leads to a trial-and-error process which causes a prolonged duration of surgery. By planning an appropriate reduction path-an optimal sequence of target-directed movements-these problems should be overcome...
March 20, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28318066/three-dimensional-ultrashort-echo-time-cones-t1%C3%AF-3d-ute-cones-t1%C3%AF-imaging
#6
Ya-Jun Ma, Michael Carl, Hongda Shao, Anthony S Tadros, Eric Y Chang, Jiang Du
We report a novel three-dimensional (3D) ultrashort echo time (UTE) sequence employing Cones trajectory and T1ρ preparation (UTE-Cones-T1ρ ) for quantitative T1ρ assessment of short T2 tissues in the musculoskeletal system. A basic 3D UTE-Cones sequence was combined with a spin-locking preparation pulse for T1ρ contrast. A relatively short TR was used to decrease the scan time, which required T1 measurement and compensation using 3D UTE-Cones data acquisitions with variable TRs. Another strategy to reduce the total scan time was to acquire multiple Cones spokes (Nsp ) after each T1ρ preparation and fat saturation...
March 20, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28315143/unclassified-mr-arthrography-pattern-evaluation-in-patients-with-episodes-of-recurrent-antero-inferior-shoulder-dislocation
#7
Luca Saba, Massimo De Filippo
PURPOSE: To evaluate prospectively the incidence of unclassifiable MR arthrography patterns of glenoid anterior-inferior labrum lesions, in patients with at least two episodes of recurrent antero-inferior shoulder dislocation. MATERIALS AND METHODS: The MR shoulder Arthrography images of 36 patients, with at least two episodes of recurrent antero-inferior dislocation, were prospectively evaluated, during a period between November 2015 and Mai 2016. All patients were contacted after 6 months of the MR arthrography to evaluate their course of treatment...
March 17, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28314901/arterial-pseudoaneurysms-of-the-shoulder-mimicking-other-entities-utilization-of-pulsation-artifact-on-musculoskeletal-mr-for-accurate-diagnosis-in-2-cases
#8
Mohammad Samim, Jacob Mandell, Stacy Smith, Neena Kapoor, Gregory Czuczman
We present two cases of pseudoaneurysm (PSA) about the shoulder mimicking more common clinical entities-soft tissue neoplasm and septic arthritis-for which biopsy of the mass and joint aspiration were requested respectively. We review the imaging findings of PSA with emphasis on findings in musculoskeletal protocol MRI, including the identification of pulsation artifact in both cases, which was critical to establishing the correct diagnosis. In the proper clinical setting, with imaging findings demonstrating a complex mass or fluid collection, MR images should be scrutinized for the presence of pulsation artifact, which can help diagnose a high-flow vascular lesion and avoid a potentially harmful invasive procedure such as biopsy...
March 18, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28304116/diagnostic-accuracy-of-computed-tomography-guided-biopsy-in-pathological-fractures
#9
Christopher M Stokes, Osama Elsewaisy, Grant Pang, John L Slavin, Stephen M Schlicht, Peter F M Choong
BACKGROUND: Obtaining a histological diagnosis is essential for appropriate management of pathological fractures. Computed tomography (CT) is an accurate method of obtaining diagnosis for musculoskeletal tumours. We analysed whether diagnostic accuracy was maintained in the evaluation of pathological fractures. METHODS: A retrospective review of 101 consecutive patients presenting to our tertiary musculoskeletal tumour centre with pathological fracture was performed...
March 17, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28304099/impact-of-shoulder-sonography-on-clinical-decision-making
#10
Michael V Friedman, Travis J Hillen, David V Holland, James M Essenberg, Jennifer L Demertzis
OBJECTIVES: To assess the impact of musculoskeletal shoulder sonography (US) on clinical decision making. METHODS: This Health Insurance Portability and Accountability Act-compliant retrospective study received Institutional Review Board approval with a waiver of informed consent. Consecutive musculoskeletal shoulder US examinations ordered over a 12-month period were retrospectively reviewed. The medical records of each patient were analyzed, recording immediate pre- and post-US treatment plans...
March 17, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28301213/academic-radiologist-subspecialty-identification-using-a-novel-claims-based-classification-system
#11
Andrew B Rosenkrantz, Wenyi Wang, Danny R Hughes, Luke A Ginocchio, David A Rosman, Richard Duszak
OBJECTIVE: The objective of the present study is to assess the feasibility of a novel claims-based classification system for payer identification of academic radiologist subspecialties. MATERIALS AND METHODS: Using a categorization scheme based on the Neiman Imaging Types of Service (NITOS) system, we mapped the Medicare Part B services billed by all radiologists from 2012 to 2014, assigning them to the following subspecialty categories: abdominal imaging, breast imaging, cardiothoracic imaging, musculoskeletal imaging, nuclear medicine, interventional radiology, and neuroradiology...
March 16, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28298464/the-achilles-tendon-is-mechanosensitive-in-older-adults-adaptations-following-14%C3%A2-weeks-versus-1-5%C3%A2-years-of-cyclic-strain-exercise
#12
Gaspar Epro, Andreas Mierau, Jonas Doerner, Julian A Luetkens, Lukas Scheef, Guido M Kukuk, Henning Boecker, Constantinos N Maganaris, Gert-Peter Brüggemann, Kiros Karamanidis
The aging musculoskeletal system experiences a general decline in structure and function, characterized by a reduced adaptability to environmental stress. We investigated whether the older human Achilles tendon (AT) demonstrates mechanosensitivity (via biomechanical and morphological adaptations) in response to long-term mechanical loading. Thirty-four female adults (60-75 years) were allocated to either a medium-term (14 weeks; N=21) high AT strain cyclic loading exercise intervention or a control group (N=13), with 12 participants continuing with the intervention for 1...
March 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28297568/safety-studies-for-use-of-adipose-tissue-derived-mesenchymal-stromal-stem-cells-in-a-rabbit-model-for-osteoarthritis-to-support-a-phase-i-clinical-trial
#13
Scott M Riester, Janet M Denbeigh, Yang Lin, Dakota L Jones, Tristan de Mooij, Eric A Lewallen, Hai Nie, Christopher R Paradise, Darcie J Radel, Amel Dudakovic, Emily T Camilleri, Dirk R Larson, Wenchun Qu, Aaron J Krych, Matthew A Frick, Hee-Jeong Im, Allan B Dietz, Jay Smith, Andre J van Wijnen
Adipose-derived mesenchymal stem cells (AMSCs) offer potential as a therapeutic option for clinical applications in musculoskeletal regenerative medicine because of their immunomodulatory functions and capacity for trilineage differentiation. In preparation for a phase I clinical trial using AMSCs to treat patients with osteoarthritis, we carried out preclinical studies to assess the safety of human AMSCs within the intra-articular joint space. Culture-expanded human AMSCs grown in human platelet-lysate were delivered via intra-articular injections into normal healthy rabbit knees and knees at risk for the development of osteoarthritis after bilateral medial anterior hemimeniscectomy...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28295547/practitioner-perceptions-of-the-anesthetic-needs-for-magnetic-resonance-imaging-in-pediatric-patients
#14
Glenn E Mann, Adam Canter, Singh Nair, Donna LaMonica, Madelyn Kahana, Jennifer Yoo, Ellise Delphin
There is currently an increasing use of magnetic resonance imaging (MRI) as a diagnostic tool in the pediatric population(1). MRI is often viewed as an ideal diagnostic modality because it does not require exposure to ionizing radiation, provides superior soft tissue image quality compared with computed tomography (CT) and is thus well-suited for neurological, musculoskeletal, cardiac, thoracic, and abdominal studies(2). However, MRIs require patient cooperation and extended time periods of immobility, as the studies are often long, loud, and may induce claustrophobia (2-7)...
March 12, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28290736/accuracy-and-reliability-of-marker-based-approaches-to-scale-the-pelvis-thigh-and-shank-segments-in-musculoskeletal-models
#15
Hans Kainz, Hoa Hoang, Chris Stockton, Roslyn R Boyd, David G Lloyd, Christopher P Carty
Gait analysis together with musculoskeletal modelling is widely used for research. In the absence of medical images, surface marker locations are used to scale a generic model to the individual's anthropometry. Studies evaluating the accuracy and reliability of different scaling approaches in a paediatric and/or clinical population have not yet been conducted and, therefore, formed the aim of this study. Magnetic resonance images (MRI) and motion capture data were collected from twelve participants with cerebral palsy and six typically developed participants...
March 14, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28289785/-incidental-findings-in-musculoskeletal-radiology
#16
F Wünnemann, C Rehnitz, M-A Weber
BACKGROUND: Increasing numbers of conventional X‑rays, computed tomography and magnetic resonance imaging in the inpatient, outpatient and scientific routine leads to an increasing number of incidental findings. The correct interpretation of these incidental findings with respect to the relevance and the evaluation concerning further work-up is an important task of radiologists. OBJECTIVE: Description of common incidental findings in musculoskeletal imaging and their clinical classification...
March 13, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28286523/interobserver-agreement-in-magnetic-resonance-of-the-sacroiliac-joints-in-patients-with-spondyloarthritis
#17
Juan C Rueda, Sofia Arias-Correal, Andres Y Vasquez, Enrique Calvo, Paola Peña, Marlon Porras, Jose-Ignacio Angarita, Eugenia-Lucia Saldarriaga, Ana M Santos, John Londono
Background. Clinical, laboratory, and radiologic parameters are used for diagnosis and classification of spondyloarthritis (SpA). Magnetic resonance imaging (MRI) of sacroiliac (SI) joints is being increasingly used to detect early sacroiliitis. We decided to evaluate the interobserver agreement in MRI findings of SI joints of SpA patients between a local radiologist, a rheumatologist, and an expert radiologist in musculoskeletal diseases. Methods. 66 MRI images of the SI joints of patients with established diagnosis of SpA were evaluated...
2017: International Journal of Rheumatology
https://www.readbyqxmd.com/read/28284743/whole-body-mr-imaging-a-useful-imaging-modality-in-the-management-of-children-with-acute-myeloid-leukemia
#18
Hee Mang Yoon, Jeong Rye Kim, Ah Young Jung, Young Ah Cho, Ho Joon Im, Jin Seong Lee
INTRODUCTION: To evaluate the distribution of chloromas using whole body magnetic resonance (MR) imaging in pediatric patients with acute myeloid leukemia (AML) and to assess the clinical role of whole body MR imaging in management of pediatric patients with AML. MATERIALS AND METHODS: We retrospectively searched pediatric patients (< 18 years old) who were diagnosed with AML and underwent whole body MR imaging during their illness between January 2006 and December 2014...
February 16, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/28283185/a-simple-but-reliable-method-for-measuring-3d-achilles-tendon-moment-arm-geometry-from-a-single-static-magnetic-resonance-scan
#19
C F Alexander, I Lum, S Reid, E Clarke, K Stannage, A El-Sallam Abd, R D Herbert, C J Donnelly
Current methods for measuring in vivo 3D muscle-tendon moment arms generally rely on the acquisition of magnetic resonance imaging (MRI) scans at multiple joint angles. However, for patients with musculoskeletal pathologies such as fixed contractures, moving a joint through its full range of motion is not always feasible. The purpose of this research was to develop a simple, but reliable in vivo 3D Achilles tendon moment arm (ATMA) technique from a single static MRI scan. To accomplish this, for nine healthy adults (5 males, 4 females), the geometry of a cylinder was fit to the 3D form of the talus dome, which was used to estimate the talocrural flexion/extension axis, and a fifth-order polynomial fit to the line of action of the Achilles tendon...
February 17, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28282030/platelet-rich-plasma-for-regeneration-of-neural-feedback-pathways-around-dental-implants-a-concise-review-and-outlook-on-future-possibilities
#20
REVIEW
Yan Huang, Michael M Bornstein, Ivo Lambrichts, Hai-Yang Yu, Constantinus Politis, Reinhilde Jacobs
Along with the development of new materials, advanced medical imaging and surgical techniques, osseointegrated dental implants are considered a successful and constantly evolving treatment modality for the replacement of missing teeth in patients with complete or partial edentulism. The importance of restoring the peripheral neural feedback pathway and thus repairing the lack of periodontal mechanoreceptors after tooth extraction has been highlighted in the literature. Nevertheless, regenerating the nerve fibers and reconstructing the neural feedback pathways around osseointegrated implants remain a challenge...
March 10, 2017: International Journal of Oral Science
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