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https://www.readbyqxmd.com/read/29721240/mexican-patients-with-hiv-have-a-high-prevalence-of-vertebral-fractures
#1
José Antonio Mata-Marín, Carla I Arroyo-Anduiza, María de Los Ángeles Berrospe-Silva, Alberto Chaparro-Sánchez, Ana Gil-Avila, Jesús Gaytán-Martínez
Low bone mineral density (BMD) and fragility fractures are common in individuals infected with HIV, who are undergoing antiretroviral therapy (ART). In high-income countries, dual energy X-ray absorptiometrry is typically used to evaluate osteopenia or osteoporosis in HIV infected individuals. However, this technology is unavailable in low andmiddle income countries, so a different approach is needed. The aim of this study was to use X-ray scans of the spine to determine the prevalence of and associated risk factors for vertebral fractures in HIVinfected patients in a tertiary-care hospital in Mexico...
March 29, 2018: Infectious Disease Reports
https://www.readbyqxmd.com/read/29705297/effect-of-plif-and-tlif-on-sagittal-spinopelvic-balance-of-patients-with-degenerative-spondylolisthesis
#2
Mustafa Uysal, Metin Ozalay, Alihan Derincek, Alauddin Kochai, Mehmet Turker
OBJECTIVE: The aim of this study was to evaluate the effects of PLIF and TLIF on sagittal spinopelvic balance and to compare radiological results of two surgical procedures with regard to spinopelvic parameters. METHODS: Thirty-five patients (34 female and 1 male; mean age: 52.29 ± 13.08 (range: 35-75)) with degenerative spondylolisthesis cases were included in the study. Patients were divided into two groups according to surgical technique: PLIF and TLIF. The level and the severity of listhesis according to Meyerding classification were assessed and spinopelvic parameters including sacral slope, pelvic tilt, pelvic incidence (PI), lumbar lordosis, and segmental lumbar lordosis were measured on digital X-rays...
April 25, 2018: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29664148/a-retrospective-study-on-the-crestal-bone-loss-associated-with-different-implant-surfaces-in-chronic-periodontitis-patients-under-maintenance
#3
Luis Gallego, Alberto Sicilia, Pelayo Sicilia, Carmen Mallo, Susana Cuesta, Mariano Sanz
OBJECTIVE: To analyze retrospectively interproximal crestal bone loss (CBL) on external-hex "non-identical" (NI) dental implants with different surface topography, when placed in the same intra-oral location in patients with a history of chronic periodontitis following maintenance care. MATERIAL AND METHODS: The patient population consisted of 206 consecutive patients with a history of chronic periodontitis who underwent implant surgery between 2007 and 2010; 755 NI implants with different implant surfaces were placed at posterior mandibular sites: 72 machined, 145 acid-etched/machined (hybrid), and 538 anodized...
April 17, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29605528/cyberknife-stereotactic-radiosurgery-and-radiation-therapy-treatment-planning-system
#4
REVIEW
Chuxiong Ding, Cheng B Saw, Robert D Timmerman
CyberKnife is an image-guided stereotactical dose delivery system designed for both focal irradiation and radiation therapy (SRT). Focal irradiation refers the use of many small beams to deliver highly focus dose to a small target region in a few fractions. The system consists of a 6-MV linac mounted to a robotic arm, coupled with a digital x-ray imaging system. The radiation dose is delivered using many beams oriented at a number of defined or nodal positions around the patients. The CyberKnife can be used for both intracranial and extracranial treaments unlike the Gamma Knife which is limited to intracranial cases...
July 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29559351/elongated-styloid-process-in-patients-with-temporomandibular-disorders-is-there-a-link
#5
Sebastian Krohn, Phillipp Brockmeyer, Dietmar Kubein-Meesenburg, Christian Kirschneck, Ralf Buergers
BACKGROUND: Elongated styloid processes may display clinical signs that can easily be confused with symptoms associated with temporomandibular disorders (TMD). Thus, the present study aimed to investigate alterations of the styloid process in patients with TMD. METHODS: Temporomandibular joint (TMJ) X-ray images of 192 patients with RDC/TMD diagnoses were examined retrospectively. On each side, the styloid process and mandibular ramus were evaluated regarding length as well as sagittal angulation...
May 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29544343/electronic-collimation-of-radiographic-images-does-it-comprise-an-overexposure-risk
#6
Ioannis A Tsalafoutas
OBJECTIVE: To investigate whether electronic collimation software, which is available in all digital X-ray systems, may comprise an overexposure risk. METHODS: In the context of surveys on Diagnostic Reference Levels carried out in two radiographic facilities, along with data on exposure factors, the radiographic field sizes were also recorded. In one facility (Unit A), a wireless flat panel detector is used with a conventional X-ray unit, while in the other, a fully digital system is installed (Unit B)...
March 22, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29510810/structural-joint-damage-and-hand-bone-loss-in-patients-with-rheumatoid-arthritis
#7
Midtbøll Ørnbjerg Lykke
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by pain, swelling and progressive destruction of the joints leading to loss of function and invalidity. The bone destruction in RA is characterised by two distinct features: structural joint damage and hand bone loss, and their prevention is an important treatment goal. Inhibitors of tumour necrosis factor alpha (TNF-inhibitors) have markedly improved the treatment options in RA patients who fail treatment with conventional synthetic Disease Modifying Anti Rheumatic Drugs (sDMARDS), but their effectiveness with regards to structural joint damage and hand bone loss, predictors thereof and the association with disease activity during treatment have mainly been investigated in randomized controlled trials (RCTs) with limited generalizability due to strict in- and exclusion criteria...
March 2018: Danish Medical Journal
https://www.readbyqxmd.com/read/29430329/-spino-pelvic-sagittal-parameters-in-an-asymptomatic-population-in-argentina
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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...
April 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29104743/automatic-radiographic-position-recognition-from-image-frequency-and-intensity
#16
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
#17
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
#18
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...
April 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29065605/feature-extraction-and-classification-on-esophageal-x-ray-images-of-xinjiang-kazak-nationality
#19
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
#20
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
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