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https://www.readbyqxmd.com/read/28942329/investigation-of-quad-energy-high-rate-photon-counting-for-x-ray-computed-tomography-using-a-cadmium-telluride-detector
#1
Hiroshi Matsukiyo, Eiichi Sato, Yasuyuki Oda, Satoshi Yamaguchi, Yuichi Sato, Osahiko Hagiwara, Toshiyuki Enomoto, Manabu Watanabe, Shinya Kusachi
To obtain four kinds of tomograms at four different X-ray energy ranges simultaneously, we have constructed a quad-energy (QE) X-ray photon counter with a cadmium telluride (CdTe) detector and four sets of comparators and microcomputers (MCs). X-ray photons are detected using the CdTe detector, and the event pulses produced using amplifiers are sent to four comparators simultaneously to regulate four threshold energies of 20, 33, 50 and 65keV. Using this counter, the energy ranges are 20-33, 33-50, 50-65 and 65-100keV; the maximum energy corresponds to the tube voltage...
September 10, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28937328/biomechanical-effects-of-hybrid-stabilization-on-the-risk-of-proximal-adjacent-segment-degeneration-following-lumbar-spinal-fusion-using-an-interspinous-device-or-a-pedicle-screw-based-dynamic-fixator
#2
Chang-Hyun Lee, Young Eun Kim, Hak Joong Lee, Dong Gyu Kim, Chi Heon Kim
OBJECTIVE Pedicle screw-rod-based hybrid stabilization (PH) and interspinous device-based hybrid stabilization (IH) have been proposed to prevent adjacent-segment degeneration (ASD) and their effectiveness has been reported. However, a comparative study based on sound biomechanical proof has not yet been reported. The aim of this study was to compare the biomechanical effects of IH and PH on the transition and adjacent segments. METHODS A validated finite element model of the normal lumbosacral spine was used...
September 22, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28932617/visceral-leishmaniasis-malaria-coinfection-and-their-associated-factors-in-patients-attending-metema-hospital-northwest-ethiopia-suggestion-for-integrated-vector-management
#3
Getachew Ferede, Ermias Diro, Sisay Getie, Gebeyaw Getnet, Yegnasew Takele, Anteneh Amsalu, Yitayih Wondimeneh
BACKGROUND: Despite high prevalence of visceral leishmaniasis and malaria in the study area, their coinfection remains unknown. Therefore, this study was aimed to document VL-malaria coinfections and their associated factors. METHODS: A cross-sectional study was conducted among clinical suspected VL patients attending Metema hospital, Northwest Ethiopia, from January 2014 to June 2014. Blood sample was tested by rk39 antigen-based DiaMed IT-Leish dipstick and Giemsa stain microscopic examination of thick and thin blood smears for malaria detection was performed...
2017: Malaria Research and Treatment
https://www.readbyqxmd.com/read/28866438/observations-on-fluid-flow-from-exposed-dentine-in-primary-teeth-an-in-vitro-study
#4
Monticha Rangcharoen, Varisara Sirimaharaj, Sitthichai Wanachantararak, Noppakun Vongsavan, Bruce Matthews
OBJECTIVE: To investigate fluid flow through dentine in primary teeth in vitro using the replica technique, and to compare the results with those obtained from permanent dentine. DESIGN: The experiments were carried out on 22 extracted, mandibular, primary, incisor teeth. The incisal edge was removed to 1mm below the dentino-enamel junction and half the exposed surface etched with phosphoric acid. The exposed dentine was blotted dry and the pressure in the pulp cavity held at 0, 15, 30 or 45cm H2O above atmospheric for 30s...
August 25, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28863715/measurement-of-the-velocity-of-neutral-fragments-by-the-correlated-ion-and-neutral-time-of-flight-method-combined-with-velocity-map-imaging
#5
F Berthias, L Feketeová, R Della Negra, T Dupasquier, R Fillol, H Abdoul-Carime, B Farizon, M Farizon, T D Märk
In the challenging field of imaging molecular dynamics, a novel method has been developed and implemented that allows the measurement of the velocity of neutral fragments produced in collision induced dissociation experiments on an event-by-event basis. This has been made possible by combining a correlated ion and neutral time of flight method with a velocity map imaging technique. This new method relies on a multiparametric correlated detection of the neutral and charged fragments from collision induced dissociation on one single detector...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28860847/erratum-clinical-outcome-following-diam-implantation-for-symptomatic-lumbar-internal-disk-disruption-a-3-year-retrospective-analysis-corrigendum
#6
(no author information available yet)
[This corrects the article on p. 917 in vol. 9, PMID: 27826214.].
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28799836/erratum-reduction-in-adjacent-segment-degeneration-after-multilevel-posterior-lumbar-interbody-fusion-with-proximal-diam-implantation
#7
Kang Lu
No abstract text is available yet for this article.
August 11, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28585522/structural-and-photoluminescence-properties-of-silicon-nanowires-extracted-by-means-of-a-centrifugation-process-from-plasma-torch-synthesized-silicon-nanopowder
#8
Vincent Le Borgne, Marta Agati, Simona Boninelli, Paola Castrucci, Maurizio De Crescenzi, Richard Dolbec, My Ali El Khakani
We report on a method for the extraction of silicon nanowires (SiNWs) from the by-product of a plasma torch based spheroidization process of silicon. This by-product is a nanopowder which consists of a mixture of SiNWs and silicon particles. By optimizing a centrifugation based process, we were able to extract substantial amounts of highly pure Si nanomaterials (mainly SiNWs and Si nanospheres (SiNSs)). While the purified SiNWs were found to have typical outer diameters in the 10-15 nm range and lengths of up to several µm, the SiNSs have external diameters in the 10-100 nm range...
June 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28571629/ubiquity-of-microplastics-in-coastal-seafloor-sediments
#9
S D Ling, M Sinclair, C J Levi, S E Reeves, G J Edgar
Microplastic pollutants occur in marine environments globally, however estimates of seafloor concentrations are rare. Here we apply a novel method to quantify size-graded (0.038-4.0mm diam.) concentrations of plastics in marine sediments from 42 coastal and estuarine sites spanning pollution gradients across south-eastern Australia. Acid digestion/density separation revealed 9552 individual microplastics from 2.84l of sediment across all samples; equating to a regional average of 3.4 microplastics·ml(-1) sediment...
May 29, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28507611/the-impact-of-extended-typing-on-red-blood-cell-alloimmunization-in-transfused-patients
#10
Tatjana Makarovska-Bojadzieva, Emilija Velkova, Milenka Blagoevska
BACKGROUND: Red blood cell (RBC) alloimmunization is still an actual problem in our transfusion practice. In 2011, in addition to the regular ABO/D blood group typing, phenotyping for Rh (C, c, E, e) and Kell antigens was introduced for blood donors and patients undergoing blood transfusion. Our aim was to evaluate the impact of the extended RBC typing and donor/recipient matching on the incidence of RBC alloimmunization. METHODS: A retrospective comparative study was conducted by reviewing RBC request records for about 36,000 patients transfused with RBC in the period from 2013 to 2015 in comparison to the similar study conducted on 47,000 transfused patients in the period from 2005 to 2008...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28488058/-evaluating-the-maturity-of-it-supported-clinical-imaging-and-diagnosis-using-the-digital-imaging-adoption-model-are-your-clinical-imaging-processes-ready-for-the-digital-era
#11
REVIEW
J Studzinski
The Digital Imaging Adoption Model (DIAM) has been jointly developed by HIMSS Analytics and the European Society of Radiology (ESR). It helps evaluate the maturity of IT-supported processes in medical imaging, particularly in radiology. This eight-stage maturity model drives your organisational, strategic and tactical alignment towards imaging-IT planning. The key audience for the model comprises hospitals with imaging centers, as well as external imaging centers that collaborate with hospitals. The assessment focuses on different dimensions relevant to digital imaging, such as software infrastructure and usage, workflow security, clinical documentation and decision support, data exchange and analytical capabilities...
June 2017: Der Radiologe
https://www.readbyqxmd.com/read/28464372/validation-of-phantom-based-harmonization-for-patient-harmonization
#12
Joseph V Panetta, Margaret E Daube-Witherspoon, Joel S Karp
PURPOSE: To improve the precision of multicenter clinical trials, several efforts are underway to determine scanner-specific parameters for harmonization using standardized phantom measurements. The goal of this study was to test the correspondence between quantification in phantom and patient images and validate the use of phantoms for harmonization of patient images. METHODS: The National Electrical Manufacturers' Association image quality phantom with hot spheres was scanned on two time-of-flight PET scanners...
July 2017: Medical Physics
https://www.readbyqxmd.com/read/28389537/airborne-pathogens-inside-automobiles-for-domestic-use-assessing-in-car-air-decontamination-devices-using-staphylococcus-aureus-as-the-challenge-bacterium
#13
Syed A Sattar, Bahram Zargar, Kathryn E Wright, Joseph R Rubino, M Khalid Ijaz
Family cars represent ∼74% of the yearly global output of motorized vehicles. With a life expectancy of ∼8 decades in many countries, the average person spends >100 min daily inside the confined and often shared space of the car, with exposure to a mix of potentially harmful microbes. Can commercial in-car microbial air decontamination devices mitigate the risk? Three such devices (designated devices 1 to 3) with HEPA filters were tested in the modified passenger cabin (3.25 m(3)) of a four-door sedan housed within a biosafety level 3 containment facility...
May 15, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28301394/effects-on-the-anti-abo-titers-of-military-blood-donors-from-a-predeployment-vaccination-program
#14
Olle Berséus
BACKGROUND: The use of blood group O as "universal blood" for emergency whole blood transfusions carries the risk for a hemolytic transfusion reaction mediated by incompatible A/B antibodies. This risk can be minimized by assuring that the donor has a low titer of anti-A and anti-B. The level of these naturally occurring antibodies has been shown to be increased by vaccination with most biologically derived vaccines. This boostering effect has been investigated for the new generation of vaccines...
June 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28293401/alloimmunization-in-patients-with-sickle-cell-disease-and-thalassemia-experience-of-a-single-centre-in-oman
#15
Salam Alkindi, Saba AlMahrooqi, Sumaiya AlHinai, Ali AlMarhoobi, Saif Al-Hosni, Shahina Daar, Naglaa Fawaz, Anil Pathare
BACKGROUND: Blood transfusion is an integral part of the supportive care for patients with sickle cell disease (SCD) and thalassaemia. The hazard of red cell alloimmunization, however, is one of the main complications of this therapy. OBJECTIVES: The aim of this study was to evaluate the prevalence of red cell alloimmunization in Omani patients with sickle cell anaemia and thalassemia. METHODS: This study included 262 patients whose historical transfusion records were available...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28182422/unraveling-the-structure-affinity-relationship-between-cucurbit-n-urils-n-7-8-and-cationic-diamondoids
#16
David Sigwalt, Marina Šekutor, Liping Cao, Peter Y Zavalij, Jiří Hostaš, Haresh Ajani, Pavel Hobza, Kata Mlinarić-Majerski, Robert Glaser, Lyle Isaacs
We report the measurement of the binding constants (Ka) for cucurbit[n]uril (n = 7, 8) toward four series of guests based on 2,6-disubstituted adamantanes, 4,9-disubstituted diamantanes, 1,6-disubstituted diamantanes, and 1-substituted adamantane ammonium ions by direct and competitive (1)H NMR spectroscopy. Compared to the affinity of CB[7]·Diam(NMe3)2, the adamantane diammonium ion complexes (e.g., CB[7]·2,6-Ad(NH3)2 and CB[7]·2,6-Ad(NMe3)2) are less effective at realizing the potential 1000-fold enhancement in affinity due to ion-dipole interactions at the second ureidyl C═O portal...
February 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28164163/change-of-sagittal-spinal-alignment-and-its-association-with-pain-and-function-after-lumbar-surgery-augmented-with-an-interspinous-implant
#17
Rebecca J Crawford, Quentin J Malone, Roger I Price
BACKGROUND: Interspinous spacer/implants like the Device for Intervertebral Assisted Motion (DIAM™) are controversially yet commonly used in the surgical treatment of lumbar degenerative pathologies. Criticism is based on ill-defined indications, lack of superiority over decompression, and a poorly understood mechanical effect. Yet, continued use by surgeons implies their perceived clinical merit. We examined radiographic spinal alignment for 12 months, and pain and function for 24 months, after DIAM-augmented surgery to improve the understanding of the mechanical effect relating to clinical outcomes in patients...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28154432/are-entomopathogenic-nematodes-effective-biological-control-agents-against-the-carob-moth-ectomyelois-ceratoniae
#18
Zahra Memari, Javad Karimi, Shokoofeh Kamali, Seyed Hossein Goldansaz, Mojtaba Hosseini
The carob moth (Ectomyelois ceratoniae) is the key pest of pomegranate, which causes a significant percentage of losses in pomegranate orchards and warehouses of Iran annually. The pest larvae are characterized by displaying a cryptic behavior within the fruit, which avoids most routine control techniques, especially chemical method. The low efficiency of traditional measurements and also the rich species diversity of natural enemies within the infested fruits highlight the necessity of exploring effective control methods, especially environmental friendly approaches...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28046765/su-f-t-49-dosimetry-parameters-and-tps-commissioning-for-the-civasheet-directional-pd-103-brachytherapy-source
#19
M J Rivard
PURPOSE: The CivaSheet is a new LDR Pd-103 brachytherapy device offering directional-radiation for preferentially irradiating malignancies with healthy-tissue sparing. Observations are presented on dosimetric characterization, TPS commissioning, and evaluation of the dosesuperposition- principle for summing individual elements comprising a planar CivaSheet METHODS: The CivaSheet comprises individual sources (CivaDots, 0.05cm thick and 0.25cm diam.) inside a flexible bioabsorbable substrate with a 0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28026727/radiological-changes-after-interspinous-dynamic-stabilisation-for-lateral-stenosis-of-lumbar-spinal-canal-a-parallel-group-randomised-trial
#20
RANDOMIZED CONTROLLED TRIAL
J Mohar, M Cimerman
PURPOSE OF THE STUDY Interspinous dynamic stabilisation devices (IDSDs) are used for stabilisation and indirect decompression of the spinal motion segment in minimally invasive treatment of degenerative conditions of lumbar spine. Good methodological quality studies on biomechanical effects of IDSDs are lacking in scientific literature. The purpose of this study was to evaluate the biomechanical effect of dynamic IDSD implantation on a spinal motion segment. MATERIAL AND METHODS We conducted a parallel group randomised trial (RT) on twelve patients, comparing radiological stabilisation and indirect decompression outcome measures between groups of patients with an isolated degenerative condition of L4-L5 motion segment and unilateral L5 nerve root radiculopathy...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
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