Read by QxMD icon Read

Stress radiography

Wolfram Wiest, Alexander Rack, Simon Zabler, Alex Schaer, Michael Swain, Katja Nelson
State-of-the art, two-piece dental implants made from titanium alloys exhibit a complex micromechanical behavior under dynamical load. Its understanding, especially the formation of microgaps, is of crucial importance in order to predict and improve the long-term performance of such implants. Microgap formation in a loaded dental implant with a conical implant-abutment connection can be studied and quantified by synchrotron radiography with micrometer accuracy. Due to the high costs and limited access to synchrotron radiation sources, alternative approaches are needed in order to depict the microgap formation...
February 2018: Heliyon
Ali Guermazi, Daichi Hayashi, Mohamed Jarraya, Michel D Crema, Roald Bahr, Frank W Roemer, João Grangeiro, Richard G Budgett, Torbjorn Soligard, Romulo Domingues, Abdalla Skaf, Lars Engebretsen
Purpose To describe the occurrence of imaging-depicted sports-related stress injuries, fractures, and muscle and tendon disorders during the 2016 Summer Olympic Games in Rio de Janeiro, Brazil. Materials and Methods Data on radiologic examinations were collected and retrospectively analyzed centrally by two board-certified musculoskeletal radiologists (with a third musculoskeletal radiologist acting as an adjudicator in case of discrepancies). Descriptive data on all imaging examinations by using radiography, ultrasonography (US), and magnetic resonance (MR) imaging were collected and analyzed according to imaging modality, country of origin of the athletes, type of sport, and type and location of injury...
February 26, 2018: Radiology
K Bušková, D Kuběnová, M Tuček
Fractures of the fifth metatarsal base are among the most common fractures of the foot. They are typically caused by indirect violence during sports activities. This region is also a site where stress fractures occur frequently. Diagnosis is based on the patients medical history, clinical examination and imaging methods. The fundamental imaging method is radiography of the foot in three views. MRI is used primarily for early diagnosis of stress fractures. CT examination is beneficial mainly in complex foot injuries, in order to rule out associated fractures...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
Santiago Pache, Zachary S Aman, Mitchell Kennedy, Gilberto Yoshinobu Nakama, Gilbert Moatshe, Connor Ziegler, Robert F LaPrade
The posterior cruciate ligament (PCL) is the largest and strongest ligament in the human knee, and the primary posterior stabilizer. Recent anatomy and biomechanical studies have provided an improved understanding of PCL function. PCL injuries are typically combined with other ligamentous, meniscal and chondral injuries. Stress radiography has become an important and validated objective measure in surgical decision making and post-operative assessment. Isolated grade I or II PCL injuries can usually be treated non-operatively...
January 2018: Archives of Bone and Joint Surgery
M Fiebich, D Weber
CLINICAL/METHODICAL ISSUE: Digital volume tomography (DVT) and cone-beam computed tomography (CT) with C‑arm systems have become established three-dimensional imaging systems as an alternative to CT in some application areas. STANDARD RADIOLOGICAL METHODS: The technology of the systems is well developed so that they have become a competing method to CT imaging in terms of image quality and radiation exposure. PERFORMANCE: An advantage is the better spatial resolution, preferably with dedicated scanner systems, especially in the z direction...
February 7, 2018: Der Radiologe
João Ellera Gomes, Arthur F Soares, Carlos E Bastiani, Jacqueline Vieira de Castro
BACKGROUND: The anterior drawer test is traditionally used to assess ankle instability, but we believe that there is room for a small but effective improvement by adding digital palpation of the talus. We aimed to determine the accuracy of anterolateral talar palpation (ATP) in the diagnosis of ankle instability by comparing it with the traditional anterior drawer test. METHODS: Fourteen symptomatic and 10 asymptomatic patients were examined for excessive mobility through comparison of both ankles by two blinded orthopedic surgeons, each one using one of the above-mentioned tests...
June 6, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
John J Kellett, Gregory A Lovell, David A Eriksen, Matthew J Sampson
Literature on the various techniques for imaging injuries to the ankle syndesmosis to determine the most appropriate imaging modality for diagnosing syndesmosis ligament disruption and instability was reviewed using the following data sources: Pubmed, Google scholar, SportsDiscus, E-journals and PLOSone. Search terms used were: syndesmosis paired with injury, imaging, radiology, X-ray, stress X-ray, arthrography, ultrasound, nuclear medicine scan, CT scan, MRI and arthroscopy. Articles were selected by reading abstracts and the full article if indicated...
February 5, 2018: Journal of Medical Imaging and Radiation Oncology
Bente Thamsen, Mathieu Plamondon, Marcus Granegger, Marianne Schmid Daners, Rolf Kaufmann, Antonia Neels, Mirko Meboldt
The HeartWare HVAD is a radial rotary blood pump with a combination of passive magnetic and hydrodynamic bearings to levitate the impeller. The axial gap size between impeller and housing in this bearing and its sensitivity to speed, flow, and pressure difference is difficult to assess. Shear stresses are exceptionally high in this tiny gap making it important for blood damage and related adverse events. Therefore, the aim of this study was to measure the axial gap clearance in the HVAD at different operating conditions employing radiography...
January 17, 2018: Artificial Organs
Ryan Tai, Tyson Bolinske, Varand Ghazikhanian, Jacob C Mandell
OBJECTIVE: To determine the prevalence of intra-articular gas (IAG) on elbow radiography and evaluate variables, including IAG, as predictors of UCL injury. MATERIALS AND METHODS: This IRB-approved retrospective study consisted of 241 consecutive elbow radiographic studies containing AP radiographs with valgus stress of both symptomatic and asymptomatic sides in 234 patients. The IAG, medial joint space (MJS), and MJS difference between the symptomatic and asymptomatic elbow (MJSD) were evaluated by two readers, as well as patient age, gender, sport played, and handedness...
January 10, 2018: Skeletal Radiology
John M Marzo, Melissa A Kluczynski, Corey Clyde, Mark J Anders, Christopher E Mutty, Christopher A Ritter
For AO 44-B2 ankle fractures of uncertain stability, the current diagnostic standard is to obtain a gravity stress radiograph, but some have advocated for the use of weight-bearing radiographs. The primary aim was to compare measures of medial clear space (MCS) on weight-bearing cone beam computed tomography (CBCT) scans versus gravity stress radiographs for determining the state of stability of ankle fractures classified as AO SER 44-B2 or Weber B. The secondary aim was to evaluate the details offered by CBCT scans with respect to other findings that may be relevant to patient care...
December 2017: Quantitative Imaging in Medicine and Surgery
Michael A Robbins, Dominik R Haudenschild, Adam M Wegner, Eric O Klineberg
Study Design: Review of literature. Objectives: This review of literature investigates the application of mesenchymal stem cells (MSCs) in spinal fusion, highlights potential uses in the development of bone grafts, and discusses limitations based on both preclinical and clinical models. Methods: A review of literature was conducted looking at current studies using stem cells for augmentation of spinal fusion in both animal and human models...
December 2017: Global Spine Journal
Changtae Hahn, Ji Hoon Oh, Soo-Hyun Joo, Jo-Eun Jeong, Jeong-Ho Chae, Chang-Uk Lee, Tae-Suk Kim
The current study aimed to investigate the association between mental health status and bone mineral density (BMD) using data from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008-2010. We enrolled 15,876 South Korean participants (4,010 postmenopausal females, 4,836 premenopausal females, and 7,016 males, all aged 20 years or older). BMD was measured using dual-energy radiography absorptiometry at the femoral neck (NK), lumbar spine (LSP), and total femur (TFM). Mental health status data were obtained from a self-report questionnaire that assessed psychological stress, depressed mood, and suicidal ideation...
2017: PloS One
Milena B Silva, Ana P D Demasi, Elizabeth F Martinez, Maristane L Goudinho, Joarlene M Soares, José L C Junqueira, Ney S Araujo
OBJECTIVES: The aim of this study was to evaluate peroxiredoxin I (Prx I) participation in the cellular antioxidant response to low-dose X-rays through the analysis of its expression in buccal mucosa cells from patients of different ages following panoramic dental radiography. MATERIALS AND METHODS: Of the 50 patients included in this study, oral mucosa cells from six adults were collected for the immunofluorescence cytological analysis. The other 44 patients, 11 patients aged below 20 years; 22 patients aged between 20 and 50 years; and 11 patients aged above 50 years, were submitted to panoramic dental radiography, and oral mucosa cells were collected for the gene expression analysis before and 1 hour after exposure...
October 23, 2017: Clinical Oral Investigations
Fernando Ruiz Santiago, Alberto Martínez Martínez, Pablo Tomás Muñoz, José Pozo Sánchez, Antonio Zarza Pérez
This extended review tries to cover the imaging findings of the wide range of shoulder injuries secondary to shoulder joint instability. Usefulness of the different imaging methods is stressed, including radiography, computed tomography (CT) and magnetic resonance. The main topics to be covered include traumatic, atraumatic and minor instability syndromes. Radiography may show bone abnormalities associated to instability, including developmental and post-traumatic changes. CT is the best technique depicting and quantifying skeletal changes...
August 2017: Quantitative Imaging in Medicine and Surgery
A Wareing, C Buissink, D Harper, M Gellert Olesen, M Soto, S Braico, P Van Laer, I Gremion, L Rainford
OBJECTIVES: The aim of the study was to complete a collaborative review of Radiography continuing professional development (CPD) research material to support the production of European Federation of Radiographer Societies (EFRS) CPD recommendations. A meta-ethnography approach to literature review was applied focussing upon commonalities rather than discrepancies between research outcomes. This facilitated exploration of context across the geographical region of Europe with national variations in CPD governance...
September 2017: Radiography
Grayson A Doss, Jackie M Williams, Christoph Mans
Contrast imaging studies are routinely performed in avian patients when an underlying abnormality of the gastrointestinal (GI) tract is suspected. Fluoroscopy offers several advantages over traditional radiography and can be performed in conscious animals with minimal stress and restraint. Although birds of prey are commonly encountered as patients, little is known about GI transit times and contrast imaging studies in these species, especially owls. Owls are commonly encountered in zoological, educational, and wildlife settings...
June 2017: Journal of Avian Medicine and Surgery
Tateishi Tomohiko, Tsuyoshi Nagase, Teruhiko Nakagawa, Tsuchiya Masamitsu
OBJECTIVE: Stress fractures of the proximal epiphysis of the fifth metatarsal bone (termed Jones fracture) frequently occur in both senior high-school-age and older contestant-level soccer players, and its incidence in Japanese soccer players is higher than that in European players. Surgery is most commonly indicated for a complete fracture, and about 3 months are required before the patient is able to return to the sport. We have performed a "Jones fracture screening" to reduce the incidence of these fractures...
July 2017: Journal of Orthopaedic Trauma
Stefano Bianchi, Dien Hung Luong
We present a retrospective review of 8 patients (6 women and 2 men, with an age range of 46-80 years; mean age, 60.2 years) in whom sonography was used to diagnose a calcaneal stress fracture. Sonography was performed because of a clinical suspicion of soft tissue injuries. Two patients were first assessed by standard radiography; for the remaining patients, sonography was the first imaging technique used. Patients were subsequently examined by magnetic resonance imaging, except for 1 patient in whom the diagnosis was made only on a clinical-sonographic correlation...
June 12, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Hong-Geun Jung, Na-Ra Kim, Tae-Hoon Kim, Joon-Sang Eom, Dong-Oh Lee
BACKGROUND: Studies regarding magnetic resonance imaging (MRI) findings of the lateral ankle ligaments in chronic lateral ankle instability and their clinical relevance for surgery are lacking. This study classified the lateral ankle ligament MRI findings of the anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) in chronic lateral ankle instability (CLAI) and correlated these findings with ankle stress radiographs. METHODS: We included 132 ankles with CLAI that underwent ligament reconstructions from 2006 to 2013...
June 2017: Foot & Ankle International
Jenny T Bencardino, Taylor J Stone, Catherine C Roberts, Marc Appel, Steven J Baccei, R Carter Cassidy, Eric Y Chang, Michael G Fox, Bennett S Greenspan, Soterios Gyftopoulos, Mary G Hochman, Jon A Jacobson, Douglas N Mintz, Gary W Mlady, Joel S Newman, Zehava S Rosenberg, Nehal A Shah, Kirstin M Small, Barbara N Weissman
Stress fractures, including both fatigue and insufficiency types, are frequently encountered in clinical practice as a source of pain in both athletes and patients with predisposing conditions. Radiography is the imaging modality of choice for baseline diagnosis. MRI has greatly improved our ability to diagnose radiographically occult stress fractures. Tc-99m bone scan and CT may also be useful as diagnostic tools. Although fatigue and insufficiency fractures can be self-limited and go onto healing even without diagnosis, there is usually value in initiating prompt therapeutic measures as incomplete stress fractures have the potential of progressing to completion and requiring more invasive treatment or delay in return to activity...
May 2017: Journal of the American College of Radiology: JACR
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"