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"Digital x-ray"

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https://www.readbyqxmd.com/read/27921185/hand-bone-loss-in-early-rheumatoid-arthritis-during-a-methotrexate-based-treat-to-target-strategy-with-or-without-adalimumab-a-substudy-of-the-optimized-treatment-algorithm-in-early-ra-opera-trial
#1
L M Ørnbjerg, M Østergaard, T Jensen, K Hørslev-Petersen, K Stengaard-Pedersen, P Junker, T Ellingsen, P Ahlquist, H Lindegaard, A Linauskas, A Schlemmer, M Y Dam, I Hansen, T Lottenburger, C G Ammitzbøll, A Jørgensen, S B Krintel, J Raun, M L Hetland, Ole Slot, Lars Kjær Nielsen, Henrik Skjødt, Ole Majgaard, Tove Lorenzen, Hans Christian Horn, Marcin Kowalski, Inger Lauge Johansen, Peter Mosborg Pedersen, Natalia Manilo, Henning Bliddal
This study aims to investigate 1-year hand bone loss (HBL1-year) in early rheumatoid arthritis (RA) patients treated with a methotrexate (MTX) and intra-articular triamcinolone treat-to-target strategy +/- adalimumab and to determine if HBL6months is associated with radiographic progression after 2 years. In a clinical trial (OPERA) of 180 treatment-naive early RA patients, bone mineral density (BMD) was estimated from hand radiographs with digital X-ray radiogrammetry (DXR) at baseline, after 6 (n = 90) and 12 months (n = 70) of follow-up...
December 5, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27908166/improved-targeting-accuracy-of-lung-tumor-biopsies-with-scanning-beam-digital-x-ray-tomosynthesis-image-guidance
#2
Geoff Nelson, Meng Wu, Cameron Hinkel, Ganesh Krishna, Tobias Funk, Jarrett Rosenberg, Rebecca Fahrig
PURPOSE: Electromagnetic navigation bronchoscopy (ENB) provides improved targeting accuracy during transbronchial biopsies of suspicious nodules. The greatest weakness of ENB-based guidance is the registration divergence that exists between the planning CT, acquired days or weeks before the intervention, and the patient on the table on the day of the intervention. Augmenting ENB guidance with real-time tomosynthesis imaging during the intervention could mitigate the divergence and further improve the yield of ENB-guided transbronchial biopsies...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27861206/comparison-of-the-detection-rate-of-simulated-microcalcifications-in-full-field-digital-mammography-digital-breast-tomosynthesis-and-synthetically-reconstructed-2-dimensional-images-performed-with-2-different-digital-x-ray-mammography-systems
#3
Sabine Peters, Martin Hellmich, Alexander Stork, Jörn Kemper, Olga Grinstein, Michael Püsken, Leandra Stahlhut, Sonja Kinner, David Maintz, Kathrin Barbara Krug
OBJECTIVE: The aim of this study was to compare the microcalcification detectability in an anthropomorphic phantom model regarding number, size, and shape in full-field digital mammography (FFDM), synthetically reconstructed 2-dimensional (Synthetic-2D) images, and digital breast tomosynthesis (DBT) performed with 2 different x-ray mammography systems. MATERIALS AND METHODS: Simulated microcalcifications of different numbers (0 to >39), sizes (diameter, 100-800 μm), and shapes (round vs heterogeneous) were scattered by random distribution on 50 film phantoms each divided in 4 quadrants...
November 17, 2016: Investigative Radiology
https://www.readbyqxmd.com/read/27855056/-mixed-knee-arthrodesis-a-rescue-alternative-in-knee-periprosthetic-joint-infection
#4
Roberto Enrique López-Cervantes, Adrián Huematzin Rivera-Villa, Adrián Miguel-Pérez, René Morales-de Los Santos, Rubén Torres-González, José Manuel Pérez-Atanasio
BACKGROUND: Knee arthrodesis is a rescue procedure for patients with knee periprosthetic joint infection who are not candidates for a revision surgery. The actual methods present a high complication rate with only moderate efectivity. METHODS: We retrospectively analyzed 17 cases, of patients with knee periprosthetic joint infection and bone loss treated by intramedular expandable nail and monoplanar external fixator with a mínimum evolution of 1 year, evaluating the medical records and digitalized X-rays by 2 sub specialized doctors in osteoarticular rescue surgery...
2016: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/27782850/psoriatic-arthritis-is-associated-with-bone-loss-of-the-metacarpals
#5
Alexander Pfeil, Laura Krojniak, Diane M Renz, Lisa Reinhardt, Marcus Franz, Peter Oelzner, Gunter Wolf, Joachim Böttcher
BACKGROUND: BoneXpert (BX) is a newly developed medical device based on digital X-ray radiogrammetry to measure human cortical bone thickness. The aim of this study was to quantify cortical bone loss of the metacarpals in patients with psoriatic arthritis (PsA) and compare these findings with other radiological scoring methods. METHODS: The study includes 104 patients with verified PsA. The BX method was used to measure the Metacarpal Index (MCI) at the metacarpal bones (II-IV)...
October 25, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27741541/bone-densitometry-in-children
#6
Judith E Adams
Maximizing peak bone mass in childhood is relevant to optimizing bone health in later life, so the study of the skeleton in children in health and disease is important. Dual-energy X-ray absorptiometry (DXA) is the most widely used clinical tool for the assessment of bone status in children. Technological developments in DXA enable vertebral fracture assessment at much lower ionizing radiation doses than spinal radiographs. Quantitative computed tomography remains predominantly a research tool but has some advantages over DXA in not being size dependent...
July 2016: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/27542577/evaluating-the-effect-of-reduced-entrance-surface-dose-on-neonatal-chest-imaging-using-subjective-image-quality-evaluation
#7
Anita Conradie, Charles Petrus Herbst
INTRODUCTION: As hospitalized neonates are radiosensitive and often require numerous X-rays, institutions should investigate the optimal beam parameter combinations to deliver diagnostically acceptable quality images at the lowest possible entrance surface dose (ESD). Using a subjective approach, this study evaluated the effect of different beam parameter combinations on image quality. METHODS AND MATERIALS: Five rabbits simulated the neonatal chest. The ESD was reduced using a variation of voltage, tube current and filtration...
August 16, 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27375314/method-for-dose-reduced-3d-catheter-tracking-on-a-scanning-beam-digital-x-ray-system-using-dynamic-electronic-collimation
#8
David A P Dunkerley, Tobias Funk, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3D catheter tracking. This work proposes a method of dose-reduced 3D tracking using dynamic electronic collimation (DEC) of the SBDX scanning x-ray tube. Positions in the 2D focal spot array are selectively activated to create a region-of-interest (ROI) x-ray field around the tracked catheter. The ROI position is updated for each frame based on a motion vector calculated from the two most recent 3D tracking results...
February 27, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/27375313/a-geometric-calibration-method-for-inverse-geometry-computed-tomography-using-p-matrices
#9
Jordan M Slagowski, David A P Dunkerley, Charles R Hatt, Michael A Speidel
Accurate and artifact free reconstruction of tomographic images requires precise knowledge of the imaging system geometry. This work proposes a novel projection matrix (P-matrix) based calibration method to enable C-arm inverse geometry CT (IGCT). The method is evaluated for scanning-beam digital x-ray (SBDX), a C-arm mounted inverse geometry fluoroscopic technology. A helical configuration of fiducials is imaged at each gantry angle in a rotational acquisition. For each gantry angle, digital tomosynthesis is performed at multiple planes and a composite image analogous to a cone-beam projection is generated from the plane stack...
February 27, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/27350699/discrimination-potential-of-root-canal-treated-tooth-in-forensic-dentistry
#10
K Khalid, S Yousif, A Satti
Forensic Odontology is a vital component of forensic science and one branch involves the application of dental science to the identification of unknown human remains. The aim of this study is to investigate the discriminatory potential for identification of the radiographic morphology of obturated single root canals. Thirty periapical radiographs of patients having endodontic treatment of single rooted canals were selected randomly from the data bank of the digital X- ray system present in the restorative department, University of Science and Technology, Sudan...
2016: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/27339438/implementation-of-a-patient-dose-monitoring-system-in-conventional-digital-x-ray-imaging-initial-experiences
#11
Christina Heilmaier, Niklaus Zuber, Dominik Weishaupt
OBJECTIVES: The purpose was to report on the initial experience after implementation of a patient dose-monitoring system in conventional X-ray imaging. METHODS: A dose-monitoring system collected dose data relating to different radiographs (one projection) and studies (two or more projections). Images were acquired on digital X-ray systems equipped with flat-panel detectors. During period 1, examinations were performed in a routine fashion in 12,614 patients. After period 1, technical modifications were performed and radiographers underwent training in radiation protection...
June 23, 2016: European Radiology
https://www.readbyqxmd.com/read/27274122/cadaveric-study-using-radio-opaque-contrast-to-determine-arterial-communication-between-the-two-bellies-of-gastrocnemius-muscles
#12
Pawan Agarwal, K L Gupta, P Yadav, Dhananjaya Sharma
INTRODUCTION: Gastrocnemius muscle is a workhorse flap to cover upper third tibial defects but has a limitation in covering middle one-third tibial defects. The inferiorly based hemi gastrocnemius muscle flap can be useful for reconstruction of the middle third of the leg. The arterial communication between the gastrocnemius muscle heads has been demonstrated, the consistent location, however, was not studied in large specimens. MATERIALS AND METHODS: This study was conducted on sixty specimens of gastrocnemius muscles harvested from thirty fresh cadavers to determine arterial communication between two heads of gastrocnemius muscle using radio-opaque contrast with future application of taking one head of muscle distally based for coverage of middle third defect of tibia...
January 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/27247121/an-audit-of-tuberculosis-health-services-in-prisons-and-immigration-removal-centres
#13
Anita Mehay, Thara Raj, Lynn Altass, Autilia Newton, Eamonn O'Moore, Cathie Railton, Hong Tan, Al Story, Alison Frater
BACKGROUND: Tuberculosis (TB) is the second leading cause of death worldwide due to a single infectious agent. Rates of active TB in places of prescribed detention (PPD), which include Prisons, Young Offender Institutions and Immigration Removal Centres, are high compared with the general population. PPD therefore present an opportunity to develop targeted health programmes for TB control. This audit aims to assess current service provisions and identify barriers to achieving best practice standards in PPD across London...
May 30, 2016: Journal of Public Health
https://www.readbyqxmd.com/read/27117287/steroid-induced-bilateral-avascular-necrosis-of-head-of-femur-in-an-adult-male-patient-a-case-report
#14
Dharamvirsinh Jadeja, Vipul Solanki, Bhavesh Chavada, Chandrabhanu Tripathi
A 28 year old male patient, known case of pemphigus vulgaris was on dexamethasone pulse therapy. Total 7 pulses were given after that he developed avascular necrosis of head of femur on both sides, which was confirmed by digital X- ray and MRI. Avascular necrosis is a disabling and progressive condition in young patients gradually leads to femoral head collapse and eventual total hip arthroplasty. As per WHO-UMC causality assessment criteria, the association between reaction and drug was possible, Naranjo's score was 7...
2016: Current Drug Safety
https://www.readbyqxmd.com/read/27116027/a-new-implementation-of-digital-x-ray-radiogrammetry-and-reference-curves-of-four-indices-of-cortical-bone-for-healthy-european-adults
#15
Hans Henrik Thodberg, Joachim Böttcher, Jens Lomholt, Sven Kreiborg, Gunter Wolf, Alexander Pfeil
UNLABELLED: Digital X-ray radiogrammetry performs measurements on a hand radiograph in digital form. We present an improved implementation of the method and provide reference curves for four indices for the amount of bone. We collected 1662 hand radiographs of healthy subjects of age 9-100 years. PURPOSE: The digital X-ray radiogrammetry (DXR) method has been shown to be efficient for diagnosis of osteoporosis and for assessment of progression of rheumatoid arthritis...
2016: Archives of Osteoporosis
https://www.readbyqxmd.com/read/27103603/image-quality-evaluation-of-eight-complementary-metal-oxide-semiconductor-intraoral-digital-x-ray-sensors
#16
Sorin Teich, Wisam Al-Rawi, Masahiro Heima, Fady F Faddoul, Gil Goldzweig, Zvi Gutmacher, Dror Aizenbud
PURPOSE: To evaluate the image quality generated by eight commercially available intraoral sensors. METHODS: Eighteen clinicians ranked the quality of a bitewing acquired from one subject using eight different intraoral sensors. Analytical methods used to evaluate clinical image quality included the Visual Grading Characteristics method, which helps to quantify subjective opinions to make them suitable for analysis. RESULTS: The Dexis sensor was ranked significantly better than Sirona and Carestream-Kodak sensors; and the image captured using the Carestream-Kodak sensor was ranked significantly worse than those captured using Dexis, Schick and Cyber Medical Imaging sensors...
October 2016: International Dental Journal
https://www.readbyqxmd.com/read/27090647/histological-validation-of-icdas-ii-and-radiological-assessment-of-occlusal-carious-lesions-in-permanent-teeth
#17
Andreas Braun, Lisa Marie Julie Charlotte Guiraud, Roland Frankenberger
The International Caries Detection and Assessment System (ICDAS) was introduced for a detailed evaluation of dental caries. The aim of the present study was to compare the ICDAS scores and radiologically evaluated caries depths to the histologically evaluated carious lesions in permanent teeth. 84 freshly extracted human teeth were included. Visual examination and scoring of the occlusal aspect were performed according to the ICDAS II criteria after completing a respective e-learning programme to support training in the use of ICDAS...
April 18, 2016: Odontology
https://www.readbyqxmd.com/read/27052940/reproducibility-of-digital-measurements-of-lower-limb-deformity-on-plain-radiographs-and-agreement-with-ct-measurements
#18
G Sorin, G Pasquier, E Drumez, A Arnould, H Migaud, S Putman
INTRODUCTION: Five angles (HKA, HKS, alpha, beta, tibial slope) are used for goniometry in total knee arthroplasty. The reproducibility of the measurement of these angles has been assessed on plain and digitized x-rays, but to our knowledge, this has not been confirmed on x-rays taken on the PACS system and they have not been compared to computed tomography (CT) measurements, the reference for angle measurement. This prospective study aimed to: (1) evaluate the inter- and intrarater reliability of the measurement of these angles on digital x-rays taken on a PACS; (2) determine the agreement of these measurements with those obtained using a CT protocol...
June 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27040731/survey-of-student-attitudes-towards-digital-simulation-technologies-at-a-dental-school-in-china
#19
Q Ren, Y Wang, Q Zheng, L Ye, X D Zhou, L L Zhang
INTRODUCTION: Digital simulation technologies have become widespread in healthcare education, especially in dentistry; these technologies include digital X-ray images, digital microscopes, virtual pathology slides and other types of simulation. This study aimed to assess students' attitudes towards digital simulation technologies at a large, top-ranked dental school in China, as well as find out how students compare the digital technologies with traditional training methods. METHODS: In April 2015, a custom-designed questionnaire was distributed to a total of 389 students who had received digital technology and simulation-based training in West China Dental School during 2012-2014...
April 4, 2016: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/27014874/a-piece-of-the-puzzle-the-bone-health-index-of-the-bonexpert-software-reflects-cortical-bone-mineral-density-in-pediatric-and-adolescent-patients
#20
Michael M Schündeln, Laura Marschke, Jens J Bauer, Pia K Hauffa, Bernd Schweiger, Dagmar Führer-Sakel, Harald Lahner, Thorsten D Poeppel, Cordula Kiewert, Berthold P Hauffa, Corinna Grasemann
INTRODUCTION: Suspected osteopathology in chronically ill children often necessitates the assessment of bone mineral density. The most frequently used methods are dual-energy X-ray-absorption (DXA) and peripheral quantitative computed tomography (pQCT). The BoneXpert software provides an automated radiogrammatic method to assess skeletal age from digitalized X-rays of the left hand. Furthermore, the program calculates the Bone Health Index (BHI), a measure of cortical thickness and mineralization, which is obtained from indices of three metacarpal bones...
2016: PloS One
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