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https://www.readbyqxmd.com/read/29448290/characterization-of-severe-arterial-phase-respiratory-motion-artifact-on-gadoxetate-disodium-enhanced-mri-assessment-of-interrater-agreement-and-reliability
#1
Kristina Imeen Ringe, Julian A Luetkens, Rolf Fimmers, Renate Maria Hammerstingl, Günter Layer, Martin H Maurer, Claas Philip Nähle, Sabine Michalik, Peter Reimer, Christina Schraml, Andreas G Schreyer, Patrick Stumpp, Thomas J Vogl, Frank K Wacker, Winfried Willinek, Guido Mattias Kukuk
PURPOSE: To assess the interrater agreement and reliability of experienced abdominal radiologists in the characterization and grading of arterial phase gadoxetate disodium-related respiratory motion artifact on liver MRI. MATERIALS AND METHODS: This prospective multicenter study was initiated by the working group for abdominal imaging within the German Roentgen Society (DRG), and approved by the local IRB of each participating center. 11 board-certified radiologists independently reviewed 40 gadoxetate disodium-enhanced liver MRI datasets...
February 15, 2018: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/29330713/low-field-magnetic-resonance-imaging-offers-potential-for-measuring-tibial-component-migration
#2
F F Schröder, N J J Verdonschot, B Ten Haken, A Peters, A J H Vochteloo, D F M Pakvis, R Huis In't Veld
BACKGROUND: Roentgen stereophotogrammetric analysis (RSA) is used to measure early prosthetic migration and to predict future implant failure. RSA has several disadvantages, such as the need for perioperatively inserted tantalum markers. Therefore, this study evaluates low-field MRI as an alternative to RSA. The use of traditional MRI with prostheses induces disturbing metal artifacts which are reduced by low-field MRI. The purpose of this study is to assess the feasibility to use low-field (0...
January 12, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29035581/gene-expression-as-a-dosimeter-in-irradiated-drosophila-melanogaster
#3
Samana Shrestha, Adam Vanasse, Leon N Cooper, Michael P Antosh
Biological indicators would be of use in radiation dosimetry in situations where an exposed person is not wearing a dosimeter, or when physical dosimeters are insufficient to estimate the risk caused by the radiation exposure. In this work, we investigate the use of gene expression as a dosimeter. Gene expression analysis was done on 15,222 genes of Drosophila melanogaster (fruit flies) at days 2, 10, and 20 postirradiation, with X-ray exposures of 10, 1000, 5000, 10,000, and 20,000 roentgens. Several genes were identified, which could serve as a biodosimeter in an irradiated D...
October 16, 2017: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/29032860/biomechanical-comparison-of-two-different-locking-plates-for-open-wedge-high-tibial-osteotomy
#4
Nienke van Egmond, Dennis Janssen, Gerjon Hannink, Nico Verdonschot, Albert van Kampen
BACKGROUND: The purpose of this study was to compare the mechanical stability of a relatively thin locking plate (FlexitSystem implant) with a relatively firm locking plate (TomoFix implant), both used for opening wedge high tibial osteotomy. METHODS: Seven fresh frozen paired human cadaveric tibiae were used. The opening wedge high tibial osteotomies in the left tibiae were fixated with the FlexitSystem implant and in the right tibiae with the TomoFix implant. The tibiae were CT-scanned to determine the bone mineral density...
October 9, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28989899/volumetric-accuracy-of-cone-beam-computed-tomography
#5
Cheol-Woo Park, Jin-Ho Kim, Yu-Kyeong Seo, Sae-Rom Lee, Ju-Hee Kang, Song-Hee Oh, Gyu-Tae Kim, Yong-Suk Choi, Eui-Hwan Hwang
PURPOSE: This study was performed to investigate the influence of object shape and distance from the center of the image on the volumetric accuracy of cone-beam computed tomography (CBCT) scans, according to different parameters of tube voltage and current. MATERIALS AND METHODS: Four geometric objects (cylinder, cube, pyramid, and hexagon) with predefined dimensions were fabricated. The objects consisted of Teflon-perfluoroalkoxy embedded in a hydrocolloid matrix (Dupli-Coe-Loid TM; GC America Inc...
September 2017: Imaging Science in Dentistry
https://www.readbyqxmd.com/read/28969683/clinical-and-radiological-results-of-cruciate-retaining-total-knee-arthroplasty-with-the-nexgen%C3%A2-cr-system-comparison-of-patellar-resurfacing-versus-retention-with-more-than-14%C3%A2-years-of-follow-up
#6
Keun Churl Chun, Sung Hyun Lee, Jong Seok Baik, Seng Hwan Kook, Joung Kyue Han, Churl Hong Chun
BACKGROUND: The purpose of this study is to analyze clinical and radiological outcomes of patients (with a minimum of 14 years of follow-up) who underwent cruciate-retaining (CR) total knee arthroplasty (TKA) using a NexGen®-CR, comparing a patellar resurfacing group with a patellar retention group. METHODS: From June 1996 to April 2002, 116 cases of TKA using a NexGen®-CR who had at least 14 years of follow-up were enrolled in this study. Among them, 68 cases had patellar resurfacing and 48 had patellar retention...
October 2, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28873847/evaluation-of-dynamic-arm-supports-in-real-life-environments
#7
L A van der Heide, U Roentgen, L de Witte
Dynamic arm supports facilitate the performance of activities of daily living (ADL) in people with upper extremity limitations. For which ADL, and how devices are used in daily life differs between users, imposing a difficulty to the assessment of outcomes. Therefore this study reports on the instruments used in earlier studies. Several instruments in the domains of body functions and activities and participation were identified. Instruments used include patient reported outcome measures, questionnaires, interviews, and arm and hand function tests...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28873824/optimising-service-delivery-of-aac-at-devices-and-compensating-at-for-dyslexia
#8
Uta R Roentgen, Edith A V Hagedoren, Katrien D L Horions, Ruth J P Dalemans
To promote successful use of Assistive Technology (AT) supporting Augmentative and Alternative Communication (AAC) and compensating for dyslexia, the last steps of their provision, delivery and instruction, use, maintenance and evaluation, were optimised. In co-creation with all stakeholders based on a list of requirements an integral method and tools were developed.
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28726074/error-performances-of-a-model-based-biplane-fluoroscopic-system-for-tracking-knee-prosthesis-during-treadmill-gait-task
#9
Arnaud Barré, Kamiar Aminian
Roentgen stereophotogrammetry analysis technique allows an accurate measurement of knee joint prosthesis position and orientation using two X-ray images. Although this technique is used generally during static procedure, it is possible to use it with a biplane fluoroscopic system to measure the prosthesis kinematics during functional tasks (e.g., gait, squat, jump) performed in a laboratory environment. However, the performance of the system in terms of errors for the measurements and the model-based matching algorithm are not well known for dynamic tasks such as walking...
July 18, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28692625/a-new-craniothoracic-mattress-for-immobilization-of-the-cervical-spine-in-critical-care-patients
#10
Micha Holla, Mitchel Driessen, Thomas G E Eggen, Robin A Daanen, Allard J F Hosman, Nico Verdonschot, Gerjon Hannink
Current immobilization techniques of the cervical spine are associated with complications including pressure ulcers, discomfort, and elevated intracranial pressures with limited access to the thorax and airway. In this study, a newly developed craniothoracic immobilizer (Pharaoh mattress) for critical care patients with cervical injury was tested for its restriction of cervical movement, peak interface pressures, comfort, and radiolucency, and compared with headblocks strapped to a spineboard. Cervical movement was measured by roentgen stereophotogrammetric analysis in 5 fresh frozen cadavers...
July 2017: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/28657561/total-knee-replacement-intraoperative-and-postoperative-kinematic-assessment
#11
M Bontempi, U Cardinale, L Bragonzoni, L Macchiarola, A Grassi, C Signorelli, G M Marcheggiani Muccioli, Stefano Zaffagnini
BACKGROUND AND AIM: The main goals of the total knee arthroplasty (TKA) is to reduce the perceived pain and  restore knee mobility and function in case of osteoarthritic knees joints. Literature shows how the three major causes of TKA failures are related to wear, loosening and instability and this is due to a problem of imbalance and malalignment. Intraoperative and postoperative kinematics analysis could be of benefit for improving surgery outcome. The aim of the present paper is to give an overview of the two set-up with the highest accuracy for intraoperative and postoperative TKA kinematics evaluation, currently in use at Istituto Ortopedico Rizzoli...
June 7, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28639920/burnout-prevalence-and-associated-factors-among-radiology-residents-in-new-england-with-comparison-against-united-states-resident-physicians-in-other-specialties
#12
Jeffrey P Guenette, Stacy E Smith
OBJECTIVE: The objective of our study was to establish burnout prevalence, associated demographic and program-related factors, and degree of burnout in New England radiology residents relative to residents in other specialties. MATERIALS AND METHODS: A 31-item survey, including nine demographic and program-related questions and the 22-item Maslach Burnout Inventory-Health Services Survey, was sent to all resident members of the New England Roentgen Ray Society (20 programs, 472 residents)...
July 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28497067/the-influence-of-tribological-pairings-and-other-factors-on-migration-patterns-of-short-stems-in-total-hip-arthroplasty
#13
Thilo Floerkemeier, Michael Schwarze, Christof Hurschler, Jens Gronewold, Henning Windhagen, Gabriela von Lewinski, Stefan Budde
Over the last decade, the number of short stem total hip arthroplasty procedures has increased. Along with the possible benefits associated with short stems is a smaller implant-bone contact surface, which may have a negative influence on primary stability and impair osseointegration. Previous studies observed migration of short stems, especially within the first three months. The variables that influence migration in short stem hip implants remain unknown. Therefore, the purpose of this study was to associate the migration of short stems with its possible influencing variables...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28495213/breast-density-legislation-in-new-england-a-survey-study-of-practicing-radiologists
#14
Ana P Lourenco, Roberta M DiFlorio-Alexander, Priscilla J Slanetz
RATIONALE AND OBJECTIVES: This study aimed to assess radiologists' knowledge about breast density legislation as well as perceived practice changes resulting from the enactment of breast density legislation. MATERIALS AND METHODS: This is an institutional review board-exempt anonymous email survey of 523 members of the New England Roentgen Ray Society. In addition to radiologist demographics, survey questions addressed radiologist knowledge of breast density legislation, knowledge of breast density as a risk factor for breast cancer, recommendations for supplemental screening, and perceived practice changes resulting from density notification legislation...
May 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28471303/bone-marrow-derived-mesenchymal-stem-cells-as-autologous-therapy-in-dogs-with-naturally-occurring-intervertebral-disc-disease-feasibility-safety-and-preliminary-results
#15
Frank Steffen, Lucas Adam Smolders, Anne Marie Roentgen, Alessandro Bertolo, Jivko Stoyanov
The intradiscal application of mesenchymal stem cells (MSCs) is considered a promising strategy for intervertebral disc (IVD) regeneration. Although many studies have been published, the feasibility and regenerative effects of intradiscal MSC application have not been evaluated in an animal model suffering from naturally occurring degenerative disc disease. Six German Shepherd Dogs suffering from naturally occurring degenerative IVD disease were included. Autologous MSCs were isolated from bone marrow (iliac crest) and cultured for 3 weeks...
November 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28396224/-%C3%A3-tienne-destot-1864-1918-or-the-other-father-of-french-radiology
#16
N Foray, M Amiel, R Mornex
Étienne Destot is a French physician from Burgundy who benefited, during his studies in Lyon, from the quality of teaching of the best specialists of the time: Augagneur for hygiene, Testut for anatomy, Ollier for surgery, Lépine for the medical applications of electricity and the Lumière brothers for the technological development. During its experiments, he met Despeignes, the first radiation oncologist, Regaud pioneer of radiobiology and Bouchacourt who pointed out individual radiosensitivity. Less than two months after the X-rays discovery by Roentgen, he produced one of the first French radiographic views that were at the origin of our current knowledge in bone and cartilage anatomy and traumatology...
April 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28247661/-internal-drainage-in-cancer-patients-optimizing-treatment-of-stent-related-symptoms
#17
A G Martov, D V Ergakov, A B Novikov, N G Muzhetskaya, G L Esen'yan
INTRODUCTION: The so-called stent-related symptoms caused mainly by detrusor overactivity due to distal ("cystic") curl of the internal stent are common among patients with this type of drainage. The need for long-term stenting makes the quality of life of cancer patients one of the challenging problems of modern urology. The aim of this study was to optimize treatment of stent-related symptoms in cancer patients with internal long-term stents by complementing the treatment regimen with m-anticholinergic solifenacin...
April 2016: Urologii︠a︡
https://www.readbyqxmd.com/read/28243371/prevalence-of-diffuse-idiopathic-skeletal-hyperostosis-in-patients-with-spinal-disorders
#18
Hiromitsu Toyoda, Hidetomi Terai, Kentaro Yamada, Akinobu Suzuki, Sho Dohzono, Tomiya Matsumoto, Hiroaki Nakamura
STUDY DESIGN: Retrospective cohort study. PURPOSE: The purpose of this study was to evaluate the prevalence of diffuse idiopathic skeletal hyperostosis (DISH) in patients with spinal diseases determined by roentgen images of the whole spine. OVERVIEW OF LITERATURE: Although several studies have investigated the prevalence of DISH in healthy subjects, no detailed data have been reported on the prevalence of DISH in patients with degenerative spinal disorders...
February 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28203586/comparison-of-kinematics-and-tibiofemoral-contact-pressures-for-native-and-transplanted-lateral-menisci
#19
Patrick C McCulloch, Donald Dolce, Hugh L Jones, Andrea Gale, Michael G Hogen, Jason Alder, Jeremiah E Palmer, Philip C Noble
BACKGROUND: Lateral meniscus transplantation is a proven treatment option for the meniscus-deficient knee, yet little is known about meniscal kinematics, strain, and tibiofemoral contact pressure changes after transplantation or the effect of altered root position in lateral meniscus transplantation. PURPOSE: To compare the native lateral meniscal kinematics, strain, and tibiofemoral contact pressures to a best-case scenario meniscus transplant with perfectly matched size and position and to determine how sensitive these factors are to subtle changes in shape and position by using a nonanatomic meniscus transplant position...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28201839/mr-imaging-in-patients-with-cardiac-pacemakers-and-implantable-cardioverter-defibrillators
#20
Torsten Sommer, Wolfgang Bauer, Katharina Fischbach, Christof Kolb, Roger Luechinger, Uwe Wiegand, Joachim Lotz, Ingo Eitel, Matthias Gutberlet, Holger Thiele, Hans H Schild, Malte Kelm, Harald H Quick, Jeanette Schulz-Menger, Jörg Barkhausen, Dietmar Bänsch
This joint consensus paper of the German Roentgen Society and the German Cardiac Society provides physical and electrophysiological background information and specific recommendations for the procedural management of patients with cardiac pacemakers (PM) and implantable cardioverter defibrillators (ICD) undergoing magnetic resonance (MR) imaging. The paper outlines the responsibilities of radiologists and cardiologists regarding patient education, indications, and monitoring with modification of MR sequences and PM/ICD reprogramming strategies being discussed in particular...
March 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
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