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shoulder imaging

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https://www.readbyqxmd.com/read/28806095/a-midterm-evaluation-of-postoperative-platelet-rich-plasma-injections-on-arthroscopic-supraspinatus-repair-a-randomized-controlled-trial
#1
Jay R Ebert, Allan Wang, Anne Smith, Robert Nairn, William Breidahl, Ming Hao Zheng, Timothy Ackland
BACKGROUND: Platelet-rich plasma (PRP) has been applied as an adjunct to rotator cuff repair to improve tendon-bone healing and potentially reduce the incidence of subsequent tendon retears. PURPOSE: To investigate whether the midterm clinical and radiographic outcomes of arthroscopic supraspinatus repair are enhanced after repeated postoperative applications of PRP. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: A total of 60 patients (30 control; 30 PRP) were initially randomized to receive 2 ultrasound-guided injections of PRP to the tendon repair site at 7 and 14 days after double-row arthroscopic supraspinatus repair or not...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28796543/metal-artifact-reduction-for-orthopedic-implants-o-mar-usefulness-in-ct-evaluation-of-reverse-total-shoulder-arthroplasty
#2
Euddeum Shim, Yusuhn Kang, Joong Mo Ahn, Eugene Lee, Joon Woo Lee, Joo Han Oh, Heung Sik Kang
OBJECTIVE: The objective of this study is to evaluate the effect of the metal artifact reduction algorithm for orthopedic implants (O-MAR) on CT image quality for patients with reverse total shoulder arthroplasty (RTSA), with emphasis placed on the evaluation of bone in the vicinity of prostheses. MATERIALS AND METHODS: Sixty-five patients who underwent CT scanning after RTSA were enrolled in the study. Two radiologists analyzed the images reconstructed with filtered back projection (FBP) with or without O-MAR processing...
August 10, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28795411/does-ultrasound-enhanced-instruction-of-musculoskeletal-anatomy-improve-physical-examination-skills-of-first-year-medical-students
#3
Bryant J Walrod, Allison Schroeder, Mark J Conroy, Laura C Boucher, Marcia Bockbrader, David P Way, Kendra L McCamey, Clinton A Hartz, Michael A Jonesco, David P Bahner
OBJECTIVES: Ultrasound imaging is commonly used to teach basic anatomy to medical students. The purpose of this study was to determine whether learning musculoskeletal anatomy with ultrasound improved performance on medical students' musculoskeletal physical examination skills. METHODS: Twenty-seven first-year medical students were randomly assigned to 1 of 2 instructional groups: either shoulder or knee. Both groups received a lecture followed by hands-on ultrasound scanning on live human models of the assigned joint...
August 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28792082/rotator-cuff-healing-using-demineralized-cancellous-bone-matrix-sponge-interposition-compared-to-standard-repair-in-a-preclinical-canine-model
#4
Matthew J Smith, Ferris M Pfeiffer, Cristi R Cook, Keiichi Kuroki, James L Cook
This Level II study assessed clinically relevant outcomes for repair of large, retracted infraspinatus tendons (ISTs) using a demineralized bone matrix (DBM) sponge (FlexiGraft) hydrated in platelet-rich plasma (PRP) versus direct repair in a validated canine model. Adult research dogs (n = 10) were used. The IST was transected in each shoulder (n = 20) and randomized to direct repair or repair with DBM-PRP interposition at 4 weeks posttransection. At 12 weeks postrepair, dogs were sacrificed, and the repair evaluated by magnetic resonance imaging (MRI), histology, and biomechanical testing...
August 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28791194/a-case-report-of-surgical-management-of-hemangiopericytoma-at-the-foramen-magnum
#5
Nobuhiko Arai, Satoshi Takahashi, Hatano Mami, Yukina Tokuda, Kazunari Yoshida
BACKGROUND: Hemangiopericytoma (HPC) is a highly vascularized mesenchymal tumor known for its high rates of recurrence and metastasis. The extent of tumor removal is known to be the most trustful prognostic factor. Skull base HPCs are challenging to treat because of the difficulty of the surgical approach and proximity to vital vascular and neuronal structures. We successfully treated a case of HPC at the ventral foramen magnum through surgical gross tumor removal via a far-lateral transcondylar approach...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28783492/shoulder-muscle-atrophy-and-its-relation-to-strength-loss-in-obstetrical-brachial-plexus-palsy
#6
Christelle Pons, Frances T Sheehan, Hyun Soo Im, Sylvain Brochard, Katharine E Alter
BACKGROUND: Treatment/prevention of shoulder muscle strength imbalances are major therapeutic goals for children with obstetrical brachial plexus palsy. The study aims were to characterize muscle atrophy in children/adolescents with unilateral obstetrical brachial plexus palsy, to quantify the agonist-antagonist muscle volume balance and the association between muscle volume and strength. METHODS: Eight boys and four girls (age=12.1, standard deviation=3.3) participated in this case-control study...
July 27, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28781978/a-prospective-quantitative-evaluation-of-fatty-infiltration-before-and-after-rotator-cuff-repair
#7
Drew A Lansdown, Sonia Lee, Craig Sam, Roland Krug, Brian T Feeley, C Benjamin Ma
BACKGROUND: Current evaluation of muscle fatty infiltration has been limited by subjective classifications. Quantitative fat evaluation through magnetic resonance imaging (MRI) may allow for an improved longitudinal evaluation of the effect of surgical repair on the progression of fatty infiltration. HYPOTHESES: We hypothesized that (1) patients with isolated full-thickness supraspinatus tendon tears would have less progression in fatty infiltration compared with patients with full-thickness tears of multiple tendons and (2) patients with eventual failed repair would have higher baseline levels of fatty infiltration...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28781145/-duplication-of-the-acromioclavicular-joint-a-case-dating-from-the-end-of-the-19th-century
#8
E Verna, S Parmentier, A Richier, K Chaumoitre, M Panuel, Y Ardagna
The duplication of the acromioclavicular joint is a very rare anomaly of shoulder girdle. Here, we present a new case of unilateral duplication of the acromioclavicular joint observed on an individual from the 19th century. In the literature, two hypotheses are proposed to explain the origin of this anomaly. The first is a congenital origin that could be explained by in utero displacement of one of the clavicle's primary ossification centers, or the existence of an additional ossification center. The second is a traumatic origin resulting from an acromioclavicular fracture that occurred during the growth period of the individual...
August 3, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/28777666/shoulder-bone-geometry-affects-the-active-and-passive-axial-rotational-range-of-the-glenohumeral-joint
#9
Alexander Humphries, Srdjan Cirovic, Aliah F Shaheen
BACKGROUND: The range of motion of the glenohumeral joint varies substantially among individuals and is dependent on humeral position. How variation in shape of the humerus and scapula affects shoulder axial range of motion at various positions has not been established. PURPOSE: To quantify variation in the shape of the glenohumeral joint and investigate whether the scapula and humerus geometries affect the axial rotational range of the glenohumeral joint. STUDY DESIGN: Descriptive laboratory study...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28777218/history-and-physical-examination-for-shoulder-instability
#10
Col Chad A Haley
Glenohumeral instability frequently occurs in young active individuals especially those engaged in athletic and military activities. With advanced imaging and arthroscopic evaluation, our understanding of the injury patterns associated with instability has significantly improved. The majority of instability results from a traumatic anterior event which presents with common findings in the history, examination, and imaging studies. As such, a comprehensive evaluation of the patient is important to correctly diagnose the instability patterns and thus provide appropriate treatment intervention...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777213/glenohumeral-instability-related-to-special-conditions-slap-tears-pan-labral-tears-and-multidirectional-instability
#11
Gregory S Van Blarcum, Steven J Svoboda
Glenohumeral instability is one of the more common conditions seen by sports medicine physicians, especially in young, active athletes. The associated anatomy of the glenohumeral joint (the shallow nature of the glenoid and the increased motion it allows) make the shoulder more prone to instability events as compared with other joints. Although traumatic dislocations or instability events associated with acute labral tears (ie, Bankart lesions) are well described in the literature, there exists other special shoulder conditions that are also associated with shoulder instability: superior labrum anterior/posterior (SLAP) tears, pan-labral tears, and multidirectional instability...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28774422/polymyalgia-rheumatica
#12
REVIEW
Miguel A González-Gay, Eric L Matteson, Santos Castañeda
Polymyalgia rheumatica is an inflammatory disease that affects the shoulder, the pelvic girdles, and the neck, usually in individuals older than 50 years. Increases in acute phase reactants are typical of polymyalgia rheumatica. The disorder might present as an isolated condition or in association with giant cell arteritis. Several diseases, including inflammatory rheumatic and autoimmune diseases, infections, and malignancies can mimic polymyalgia rheumatica. Imaging techniques have identified the presence of bursitis in more than half of patients with active disease...
July 31, 2017: Lancet
https://www.readbyqxmd.com/read/28765926/imaging-characteristics-of-adult-onset-still-s-disease-demonstrated-with-18f-fdg-pet-ct
#13
Lei Jiang, Yan Xiu, Taoying Gu, Caihong Dong, Bing Wu, Hongcheng Shi
The diagnosis of adult onset Still's disease (AOSD) is non‑specific, and requires the exclusion of other diseases including infectious, inflammatory and malignant diseases. The current study aimed to summarize the imaging characteristics of fluorodeoxyglucose (18F‑FDG) positron emission tomography (PET)/computerized tomography (CT) in patients with AOSD. The 18F‑FDG PET/CT characteristic observations of 32 patients with definite AOSD were retrospectively reviewed based on visual interpretation and the semi‑quantitative index of standard uptake value of maximum (SUVmax)...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28763326/point-of-care-ultrasonography-findings-and-care-use-among-patients-undergoing-ultrasound-guided-shoulder-injections
#14
Se Won Lee, Timothy Tiu, Jeremy Roberts, Brian Lee, Matthew N Bartels, Mooyeon Oh-Park
OBJECTIVE: The aims of the study were to assess the overall reduction of pain in patients undergoing ultrasound-guided shoulder injections and to characterize the preinjection point-of-care ultrasound findings and use of clinical services postinjection including the use of magnetic resonance imaging and surgeries. DESIGN: Data of 172 patients who underwent ultrasound-guided subacromial subdeltoid injection or glenohumeral joint injection were reviewed for preinjection point-of-care ultrasound findings, change in pain intensity at 2 mos from baseline, and use of care at 6 mos' postinjection...
August 1, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28760091/pectoralis-major-rupture
#15
Joshua D Shumway, Danielle N Anderson, Dana J Hess
A 33-year-old male military service member was referred to physical therapy 4 days after competing in a bench-press competition, during which he was unable to accomplish an attempt due to a sharp/stabbing pain in his right shoulder. Given the concern for a ruptured pectoralis major, and after consultation with the orthopaedic surgeon and radiologist, magnetic resonance imaging was performed. Findings revealed a complete rupture of the pectoralis major tendon, with up to 5 cm of retraction. J Orthop Sports Phys Ther 2017;47(8):578...
August 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28759527/18f-fdg-uptake-in-parsonage-turner-syndrome
#16
Gary Sem Wye Yoong, James Thomas Patrick Decourcy Hallinan, Arvind Kumar Sinha, Lih Kin Khor, Yazeed Nasser Bin Dous
A 55-year-old man with large B-cell lymphoma developed atraumatic left shoulder pain. F-FDG PET/CT revealed new left supraspinatus and infraspinatus muscle uptake while the initial disease resolved. Given the discrepancy between initial disease treatment response and new left shoulder findings, an MRI scan was performed. This demonstrated diffuse supraspinatus and infraspinatus muscle edema and enhancement with no focal lesion. Muscle biopsy was negative for lymphoma, but features of muscle denervation were seen...
July 29, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28759525/ultrasound-and-pet-ct-correlation-in-shoulder-pathology-a-5-year-retrospective-analysis
#17
Christopher J Burke, William R Walter, Ronald S Adler, James S Babb, Joseph Sanger, Fabio Ponzo
PURPOSE: To correlate shoulder ultrasound and radiography with F-FDG PET-CT to establish FDG uptake and therefore range of metabolic activity, as defined by SUV analysis, in various symptomatic shoulder pathologies. METHODS: Retrospective database query was performed for shoulder ultrasound and PET-CT scans between January 2012 and January 2017. Patients who had both studies within 1 year were included. Age- and sex-matched control patients with PET-CT scans only were also included...
July 29, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28756567/growth-plate-injury-at-the-base-of-the-coracoid-mri-features
#18
Erin FitzGerald Alaia, Zehava Sadka Rosenberg, Ignacio Rossi, Jonathan Zember, Johannes B Roedl, Lynne Pinkney, Lynne S Steinbach
PURPOSE: To assess the MRI features of growth plate injury at the base of the coracoid process. MATERIALS AND METHODS: Subjects were identified through retrospective search of our department imaging database and teaching files and the teaching files of two outside academic institutions. The coracoid base growth plate was examined with attention to widening, irregularity, abnormal signal intensity of the growth plate, and the presence of adjacent soft tissue edema...
July 29, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28755660/computational-and-experimental-assessment-of-influences-of-hemodynamic-shear-stress-on-carotid-plaque
#19
Hui Zhou, Long Meng, Wei Zhou, Lin Xin, Xiangxiang Xia, Shuai Li, Hairong Zheng, Lili Niu
BACKGROUND: Studies have identified hemodynamic shear stress as an important determinant of endothelial function and atherosclerosis. In this study, we assess the influences of hemodynamic shear stress on carotid plaques. METHODS: Carotid stenosis phantoms with three severity (30, 50, 70%) were made from 10% polyvinyl alcohol (PVA) cryogel. The phantoms were placed in a pulsatile flow loop with the same systolic/diastolic phase (35/65) and inlet flow rate (16 L/h)...
July 29, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28755084/design-and-evaluation-of-two-multi-pinhole-collimators-for-brain-spect
#20
Ling Chen, Benjamin M W Tsui, Greta S P Mok
OBJECTIVE: SPECT is a powerful tool for diagnosing or staging brain diseases such as Alzheimer's disease (AD) and Parkinson's disease (PD) but is limited by its inferior resolution and sensitivity. At the same time, pinhole SPECT provides superior resolution and detection efficiency trade-off as compared to the conventional parallel-hole collimator for imaging small field-of-view (FOV), which fits for the case of brain imaging. In this study, we propose to develop and evaluate two multi-pinhole (MPH) collimator designs to improve the imaging of cerebral blood flow and striatum...
July 28, 2017: Annals of Nuclear Medicine
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