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"Digital x-ray"

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https://www.readbyqxmd.com/read/29430329/-spino-pelvic-sagittal-parameters-in-an-asymptomatic-population-in-argentina
#1
Alfredo Guiroy, Martín Gagliardi, Alfredo Sícoli, Nicolás Gonzalez Masanés, Alejandro Morales Ciancio, Pablo Jalón, Juan José Mezzadri
Objectives: To assess and describe spinal and pelvic sagittal parameters in a series of 100 Argentinian volunteers. Methods: Lateral full-spine X-rays were obtained prospectively from 100 volunteers (30 males and 70 females), average age 34.1 years. All the volunteers were asymptomatic at the time of the study. Full-length left lateral spine radiographs (36'' cassette) were made using Kodak Elite CR equipment. The authors made determinations for the digital X-rays using Surgimap®, version 2...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29412085/compliant-buckled-foam-actuators-and-application-in-patient-specific-direct-cardiac-compression
#2
Benjamin C Mac Murray, Chaim C Futran, Jeanne Lee, Kevin W O'Brien, Amir A Amiri Moghadam, Bobak Mosadegh, Meredith N Silberstein, James K Min, Robert F Shepherd
We introduce the use of buckled foam for soft pneumatic actuators. A moderate amount of residual compressive strain within elastomer foam increases the applied force ∼1.4 × or stroke ∼2 × compared with actuators without residual strain. The origin of these improved characteristics is explained analytically. These actuators are applied in a direct cardiac compression (DCC) device design, a type of implanted mechanical circulatory support that avoids direct blood contact, mitigating risks of clot formation and stroke...
February 2018: Soft Robotics
https://www.readbyqxmd.com/read/29384734/extra-oral-dental-radiography-for-disaster-victims-using-a-flat-panel-x-ray-detector-and-a-hand-held-x-ray-generator
#3
M Ohtani, T Oshima, S Mimasaka
BACKGROUND: Forensic odontologists commonly incise the skin for post-mortem dental examinations when it is difficult to open the victim's mouth. However, it is prohibited by law to incise dead bodies without permission in Japan. Therefore, we attempted using extra-oral dental radiography, using a digital X-ray equipment with rechargeable batteries, to overcome this restriction. MATERIALS AND METHODS: A phantom was placed in the prone position on a table, and three plain dental radiographs were used per case: "lateral oblique radiographs" for left and right posterior teeth and a "contact radiograph" for anterior teeth were taken using a flat panel X-ray detector and a hand-held X-ray generator...
December 1, 2017: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/29379253/templating-in-uncemented-tha-on-accuracy-and-postoperative-leg-length-discrepancy
#4
Nils J Strøm, Olav Reikerås
Purpose: This study examines the accuracy of digital templating in uncemented total hip arthroplasty (THA), i.e., whether the templated components where actually inserted during surgery. The surgical outcome was evaluated on the basis of limb length equality. Methods: We retrospectively examined digital x-rays of 41 patients scheduled for uncemented THA. These were templated using templating software. The template was compared to the surgical choice of implant registered in the patients' journal...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29368271/association-of-low-bone-mineral-density-with-anti-citrullinated-protein-antibody-positivity-and-disease-activity-in-established-rheumatoid-arthritis-findings-from-a-us-observational-cohort
#5
Harris A Ahmad, Evo Alemao, Zhenchao Guo, Christine K Iannaccone, Michelle L Frits, Michael Weinblatt, Nancy A Shadick
INTRODUCTION: To assess the relationship between low bone mineral density (BMD), anti-cyclic citrullinated peptide-2 (anti-CCP2) antibodies, and disease activity in patients with established rheumatoid arthritis (RA). METHODS: Patients enrolled in a single-center, observational cohort registry of patients with RA. Eligible patients had known BMD, as measured by digital X-ray radiogrammetry (DXR-BMD), and anti-CCP2 antibody measurements at the same time point or within 6 months...
January 25, 2018: Advances in Therapy
https://www.readbyqxmd.com/read/29290007/bone-geometry-quality-and-bone-markers-in-children-with-type-1-diabetes-mellitus
#6
Roberto Franceschi, Silvia Longhi, Vittoria Cauvin, Angelo Fassio, Giuseppe Gallo, Fiorenzo Lupi, Petra Reinstadler, Antonio Fanolla, Davide Gatti, Giorgio Radetti
Adults with Type 1 diabetes mellitus show a high risk of bone fracture, probably as a consequence of a decreased bone mass and microarchitectural bone alterations. The aim of the study was to investigate the potential negative effects of type 1 diabetes on bone geometry, quality, and bone markers in a group of children and adolescents. 96 children, mean age 10.5 ± 3.1 years, agreed to participate to the study. Bone geometry was evaluated on digitalized X-rays at the level of the 2nd metacarpal bone. The following parameters were investigated and expressed as SDS: outer diameter (D), inner diameter (d), cortical area (CA), and medullary area (MA)...
December 30, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/29216704/-prevalence-of-x-ray-signs-of-femoroacetabular-impingement-in-mexican-population
#7
R Gutiérrez-Ramos, S A Ávalos-Calderón, L A Bahena-Peniche
BACKGROUND: Femoroacetabular impingement (FAI) is a suggested diagnosis for pain in the hip in the absence of other apparent causes. It is thought to be a cause of progressive arthrosis of the hip. Our objective was to determine the prevalence of radiographic data of FAI in the adult population without hip pathology over a period of six months. MATERIAL AND METHODS: Analytical, observational, multicentric, ambispective and transverse study based on digital X-rays analysis...
May 2017: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/29209990/surgical-anatomy-of-the-right-gastro-omental-artery-a-study-on-100-cadaver-dissections
#8
Nicla Settembre, Marc Labrousse, Pierre Edouard Magnan, Alain Branchereau, Pierre Champsaur, Rossana Bussani, Marc Braun, Sergueï Malikov
PURPOSE: The gastro-omental artery (GOA) with the greater omentum (GO) is known for its high quality as a vascular graft, its resistance to infections as an omental flap and for its multiple applications in surgery. A better knowledge of anatomical variations of GO and its vascularization can improve the application in surgery and decrease complications. The purpose of this study was to measure diameters and lengths of the right GOA (RGOA) and study the interindividual variability of these anatomical structures...
December 5, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29104743/automatic-radiographic-position-recognition-from-image-frequency-and-intensity
#9
Ning-Ning Ren, An-Ran Ma, Li-Bo Han, Yong Sun, Yan Shao, Jian-Feng Qiu
Purpose: With the development of digital X-ray imaging and processing methods, the categorization and analysis of massive digital radiographic images need to be automatically finished. What is crucial in this processing is the automatic retrieval and recognition of radiographic position. To address these concerns, we developed an automatic method to identify a patient's position and body region using only frequency curve classification and gray matching. Methods: Our new method is combined with frequency analysis and gray image matching...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29103466/evaluation-of-cumulative-effective-dose-and-cancer-risk-from-repetitive-full-spine-imaging-using-eos-system-impact-to-adolescent-patients-of-different-populations
#10
Martin Law, Wang-Kei Ma, Eva Chan, Damian Lau, Candy Mui, Kenneth Cheung, Lawrance Yip, Wendy Lam
OBJECTIVE: To evaluate the effective dose and associated cancer risk using EOS system for scoliotic adolescent patients undergoing full spine imaging at different age of exposure; to demonstrate EOS system capable of delivering less radiation dose and hence of reducing cancer risk induction when compared with conventional digital X-ray systems; to obtain cumulative effective dose and cancer risk for both genders scoliotic adolescence of US and Hong Kong population. METHODS: Organ absorbed doses of full spine exposed scoliotic adolescent patients using EOS system have been simulated with the use of patient imaging parameters input to the Monte Carlo software PCXMC...
November 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29074476/epidemiology-of-imaging-detected-bone-stress-injuries-in-athletes-participating-in-the-rio-de-janeiro-2016-summer-olympics
#11
Daichi Hayashi, Mohamed Jarraya, Lars Engebretsen, Michel D Crema, Frank W Roemer, Abdalla Skaf, Ali Guermazi
BACKGROUND: Bone stress injuries are common in high-level athletics. AIM: To describe the demographics, frequency and anatomical location of stress injuries (ie, stress reaction and stress fractures) in athletes at the Rio de Janeiro 2016 Summer Olympic Games. METHODS: We recorded all sports injuries at the Rio de Janeiro 2016 Summer Olympics reported by the National Olympic Committee (NOC) medical teams and in the polyclinic and medical venues...
October 26, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29065605/feature-extraction-and-classification-on-esophageal-x-ray-images-of-xinjiang-kazak-nationality
#12
Fang Yang, Murat Hamit, Chuan B Yan, Juan Yao, Abdugheni Kutluk, Xi M Kong, Sui X Zhang
Esophageal cancer is one of the fastest rising types of cancers in China. The Kazak nationality is the highest-risk group in Xinjiang. In this work, an effective computer-aided diagnostic system is developed to assist physicians in interpreting digital X-ray image features and improving the quality of diagnosis. The modules of the proposed system include image preprocessing, feature extraction, feature selection, image classification, and performance evaluation. 300 original esophageal X-ray images were resized to a region of interest and then enhanced by the median filter and histogram equalization method...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/28976845/radiopacity-and-porosity-of-bulk-fill-and-conventional-composite-posterior-restorations-digital-x-ray-analysis
#13
C J Soares, Cmp Rosatto, V F Carvalho, A A Bicalho, Jcg Henriques, A L Faria-E-Silva
OBJECTIVES: To compare radiopacity and porosity as expressed by the presence of voids in restorations carried out using bulk-fill and incremental filling techniques to restore large mesio-occlusal-distal (MOD) cavities. METHODS: Fifty-five molars with MOD preparations were incrementally filled with Filtek Z-350XT (Z350XT) or bulk-fill composite: Filtek Bulk Fill/Z-350XT (FBF/Z350XT), Venus Bulk Fill/Charisma Diamond (VBF/CHA), SDR/Esthet-X HD (SDR/EST-X), Tetric EvoCeram Bulk Fill (TEC)...
November 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28943698/4d-dsa-reconstruction-using-tomosynthesis-projections
#14
Marc Buehler, Jordan M Slagowski, Charles A Mistretta, Charles M Strother, Michael A Speidel
We investigate the use of tomosynthesis in 4D DSA to improve the accuracy of reconstructed vessel time-attenuation curves (TACs). It is hypothesized that a narrow-angle tomosynthesis dataset for each time point can be exploited to reduce artifacts caused by vessel overlap in individual projections. 4D DSA reconstructs time-resolved 3D angiographic volumes from a typical 3D DSA scan consisting of mask and iodine-enhanced C-arm rotations. Tomosynthesis projections are obtained either from a conventional C-arm rotation, or from an inverse geometry scanning-beam digital x-ray (SBDX) system...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943697/localization-of-cardiac-volume-and-patient-features-in-inverse-geometry-x-ray-fluoroscopy
#15
Michael A Speidel, Jordan M Slagowski, David A P Dunkerley, Martin Wagner, Tobias Funk, Amish N Raval
The scanning-beam digital x-ray (SBDX) system is an inverse geometry x-ray fluoroscopy technology that performs real-time tomosynthesis at planes perpendicular to the source-detector axis. The live display is a composite image which portrays sharp features (e.g. coronary arteries) extracted from a 16 cm thick reconstruction volume. We present a method for automatically determining the position of the cardiac volume prior to acquisition of a coronary angiogram. In the algorithm, a single non-contrast frame is reconstructed over a 44 cm thickness using shift-and-add digital tomosynthesis...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943696/automated-3d-coronary-sinus-catheter-detection-using-a-scanning-beam-digital-x-ray-system
#16
David A P Dunkerley, Jordan M Slagowski, Lindsay E Bodart, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3D tracking of catheter electrodes concurrent with fluoroscopic display. To facilitate respiratory motion-compensated 3D catheter tracking, an automated coronary sinus (CS) catheter detection algorithm for SBDX was developed. The technique uses the 3D localization capability of SBDX and prior knowledge of the catheter shape. Candidate groups of points representing the CS catheter are obtained from a 3D shape-constrained search...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28879043/fully-automated-joint-space-width-measurement-and-digital-x-ray-radiogrammetry-in-early-ra
#17
Michael Platten, Yogan Kisten, Johan Kälvesten, Laurent Arnaud, Kristina Forslind, Ronald van Vollenhoven
OBJECTIVES: To study fully automated digital joint space width (JSW) and bone mineral density (BMD) in relation to a conventional radiographic scoring method in early rheumatoid arthritis (eRA). METHODS: Radiographs scored by the modified Sharp van der Heijde score (SHS) in patients with eRA were acquired from the SWEdish FarmacOTherapy study. Fully automated JSW measurements of bilateral metacarpals 2, 3 and 4 were compared with the joint space narrowing (JSN) score in SHS...
2017: RMD Open
https://www.readbyqxmd.com/read/28865482/decrease-in-bone-mineral-density-during-three-months-after-diagnosis-of-early-rheumatoid-arthritis-measured-by-digital-x-ray-radiogrammetry-predicts-radiographic-joint-damage-after-one-year
#18
Michael Ziegelasch, Kristina Forslind, Thomas Skogh, Katrine Riklund, Alf Kastbom, Ewa Berglin
BACKGROUND: Periarticular osteopenia is an early sign of incipient joint injury in rheumatoid arthritis (RA), but cannot be accurately quantified using conventional radiography. Digital X-ray radiogrammetry (DXR) is a computerized technique to estimate bone mineral density (BMD) from hand radiographs. The aim of this study was to evaluate whether decrease in BMD of the hands (BMD loss), as determined by DXR 3 months after diagnosis, predicts radiographic joint damage after 1 and 2 years in patients with early RA...
September 2, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28853125/placement-and-replacement-rates-of-amalgam-and-composite-restorations-on-posterior-teeth-in-a-military-population
#19
Benjamin D Owen, Peter H Guevara, William Greenwood
OBJECTIVE: Replacement rates of direct dental restorations have been reported to be 37% to 70%, occupying a large proportion of a general dentist's time. Variations in the rate of initial placement and replacement of direct dental restorations may be associated with material placed (amalgam or composite), age, caries risk of the patient, and other factors. The purpose of this research was to clarify where the majority of patient care time is spent as a restorative Army dentist regarding either the initial placement or replacement of failed restorations; and how the location, caries risk, and material used (amalgam or composite) affects replacement rates...
July 2017: U.S. Army Medical Department Journal
https://www.readbyqxmd.com/read/28692677/fux-sim-implementation-of-a-fast-universal-simulation-reconstruction-framework-for-x-ray-systems
#20
Monica Abella, Estefania Serrano, Javier Garcia-Blas, Ines García, Claudia de Molina, Jesus Carretero, Manuel Desco
The availability of digital X-ray detectors, together with advances in reconstruction algorithms, creates an opportunity for bringing 3D capabilities to conventional radiology systems. The downside is that reconstruction algorithms for non-standard acquisition protocols are generally based on iterative approaches that involve a high computational burden. The development of new flexible X-ray systems could benefit from computer simulations, which may enable performance to be checked before expensive real systems are implemented...
2017: PloS One
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