keyword
MENU ▼
Read by QxMD icon Read
search

dose area product

keyword
https://www.readbyqxmd.com/read/28088104/biofabrication-of-size-controllable-silver-nanoparticles-a-green-approach
#1
Sireesh Babu Maddinedi, Badal Kumar Mandal, Swetha Kameswari Maddili
A facile biosynthetic approach for the size controllable production of silver nanoparticles (AgNPs) using the leaf extract of Cinnamomum tsoi as reducing and capping agent is developed. The polyphenolic functionalities present in the extract are essentially responsible for the synthesis and stabilization of AgNPs. The size and morphology of the AgNPs were effectively tuned by changing the volume of the extract. The availability of oxidized polyphenols play key role in tuning the size and morphology of the prepared NPs...
January 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28079801/acute-necrotizing-retinal-vasculitis-as-onset-of-systemic-lupus-erythematosus-a-case-report
#2
Simeon Monov, Ruska Hristova, Rositza Dacheva, Reni Toncheva, Russka Shumnalieva, Viara Shoumnalieva-Ivanova, Daniela Monova
RATIONALE: Systemic lupus erythematosus (SLE) is a complex autoimmune disease characterized by autoantibody production, complement activation, and deposition of immune complexes in tissues and organs. SLE can involve any region of the visual system. Although ocular manifestations are not part of the classification criteria for SLE, they can be observed in up to one-third of the patients with SLE. They are rarely reported at the time of disease onset. Retinal vasculitis is usually associated with active generalized disease...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28079354/effect-of-excess-iodine-intake-on-thyroid-on-human-health
#3
Eftychia G Koukkou, Nikolaos D Roupas, Kostas B Markou
INTRODUCTION: The recommended daily intake of iodide, is 150 μg for adolescents and adults, 175 μg for pregnancy and 200 μg for lactation. Thyroid gland is an effective collector of iodine. EVIDENCE ACQUISITION: The active iodine uptake along the basolateral membrane of thyroid cell is followed by its transport to the apical edge of the cell and then to the follicle lumen. TSH acts through cAMP and stimulates NIS gene expression and protein synthesis. The major proportion of iodine in the thyroid gland is bound to Thyroglobulin...
January 12, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28078734/coronary-procedures-after-tavi-with-the-self-expanding-aortic-bioprosthesis-medtronic-corevalve%C3%A2-not-an-easy-matter
#4
Madjid Boukantar, Romain Gallet, Gauthier Mouillet, Abdelkaoui Belarbi, Vladimir Rubimbura, Julien Ternacle, Jean-Luc Dubois-Rande, Emmanuel Teiger
OBJECTIVES: To evaluate the feasibility of coronary procedures after transcatheter aortic valve implantation (TAVI) with the CoreValve™ device. BACKGROUND: Due to its design, CoreValve™ prosthesis may interfere with coronary procedures. Data on this issue are sparse. METHODS: Between 2007 and 2015, 550 patients underwent CoreValve™ TAVI in our hospital. Among them, 16 underwent coronary angiogram after TAVI and were included in our retrospective study...
January 11, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28076617/radiation-exposure-in-endovascular-infra-renal-aortic-aneurysm-repair-and-factors-that-influence-it
#5
Rui Machado, Vitor Miguel Dias Ferreira, Luis Loureiro, João Gonçalves, Pedro Oliveira, Rui Almeida
Objective: The endovascular repair of aortic abdominal aneurysms exposes the patients and surgical team to ionizing radiation with risk of direct tissue damage and induction of gene mutation. This study aims to describe our standard of radiation exposure in endovascular aortic aneurysm repair and the factors that influence it. Methods: Retrospective analysis of a prospective database of patients with abdominal infra-renal aortic aneurysms submitted to endovascular repair...
November 2016: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28074369/mitigating-cadmium-accumulation-in-greenhouse-lettuce-production-using-biochar
#6
Ruilun Zheng, Guoxin Sun, Cui Li, Brian J Reid, Zubin Xie, Bo Zhang, Qinghai Wang
Greenhouse experiments were conducted to investigate the influence of rice straw biochar (RSB) on soil cadmium (Cd) availability and accumulation in lettuce. The RSB was applied either in bands or broadcast in the test site of four greenhouses with soil Cd concentrations ranging from 1.70-3.14 μg g(-1). Biochar doses applied in bands were half of those broadcast. The Cd levels in the shoots of lettuce were observed to be reduced by up to 57% with increasing RSB application rate (0, 6, 12, 18 t ha(-1))...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28074334/saliva-versus-plasma-bioequivalence-of-azithromycin-in-humans-validation-of-class-i-drugs-of-the-salivary-excretion-classification-system
#7
Nasir Idkaidek, Tawfiq Arafat, Hazim Hamadi, Salim Hamadi, Ibrahim Al-Adham
AIM: The aim of this study was to compare human pharmacokinetics and bioequivalence metrics in saliva versus plasma for azithromycin as a model class I drug of the Salivary Excretion Classification System (SECS). METHODS: A pilot, open-label, two-way crossover bioequivalence study was done, and involved a single 500-mg oral dose of azithromycin given to eight healthy subjects under fasting conditions, followed by a 3-week washout period. Blood and unstimulated saliva samples were collected over 72 h and deep frozen until analysis by a validated liquid chromatography with mass spectroscopy method...
January 10, 2017: Drugs in R&D
https://www.readbyqxmd.com/read/28048880/su-f-r-34-quantitative-perfusion-measurement-in-rectal-cancer-using-three-different-pharmacokinetic-models-implications-for-prospective-study-design
#8
K Nie, T Mao, L Shi, N Yue, S Jabbour, S Kim, X Hu, L Qian, X Sun, T Niu
PURPOSE: To compare three different pharmacokinetic models for analysis of dynamic-contrast-enhanced (DCE)-CT data with respect to different acquisition times and location of region of interest. METHODS: Eight rectal cancer patients with pre-treatment DCE-CTs were included. The dynamic sequence started 4-10seconds(s) after the injection of contrast agent. The scan included a 110s acquisition with intervals of 40×1s+15×3s+4×6s. An experienced oncologist outlined the tumor region...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048767/su-f-i-77-radiation-dose-in-cardiac-catheterization-procedures-impact-of-a-systematic-reduction-in-pulsed-fluoroscopy-frame-rate
#9
C Schultz, S Dixon
PURPOSE: To evaluate whether one small systematic reduction in fluoroscopy frame rate has a significant effect on the total air kerma and/or dose area product for diagnostic and interventional cardiac catheterization procedures. METHODS: The default fluoroscopy frame rate (FFR) was lowered from 15 to 10 fps in 5 Siemens™ Axiom Artis cardiac catheterization labs (CCL) on July 1, 2013. A total of 7212 consecutive diagnostic and interventional CCL procedures were divided into two study groups: 3602 procedures from 10/1/12 -6/30/13 with FFR of 15 fps; and 3610 procedures 7/1/13 - 3/31/14 at 10 fps...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048619/su-f-t-382-volumetric-modulated-arc-therapy-vmat-beam-angle-optimization-in-pulsed-partial-brain-irradiation-ppbi-for-newly-diagnosed-glioblastoma
#10
J Zhou, Y Wang, X Ding, J Liang, D Yan, B Marples, J Dilworth
PURPOSE: To optimize VMAT beam parameters in PPBI to minimize treatment time. We investigate the coverage and organs at risk (OR) avoidance capability of shorter arcs with shorter treatment times. METHODS: We evaluated the treatment plans for eleven previously treated PPBI patients. Each patient received 46Gy (2Gy×23) to the initial target and an additional 14Gy (2Gy×7) as a sequential boost. Each daily 2-Gy fraction was delivered as ten 0.2-Gy pulses separated by 3-minute intervals using VMAT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048202/we-h-brc-02-failure-mode-and-effect-analysis-of-liver-stereotactic-body-radiotherapy
#11
I Rusu, T Thomas, J Roeske, J Price, C Perino, I Mescioglu, M Surucu
PURPOSE: To identify areas of improvement in our liver stereotactic body radiation therapy (SBRT) program, using failure mode and effect analysis (FMEA). METHODS: A multidisciplinary group consisting of one physician, three physicists, one dosimetrist and two therapists was formed. A process map covering 10 major stages of the liver SBRT program from the initial diagnosis to post treatment follow-up was generated. A total of 102 failure modes, together with their causes and effects, were identified...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048181/su-f-p-44-a-direct-estimate-of-peak-skin-dose-for-interventional-fluoroscopy-procedures
#12
V Weir, J Zhang
PURPOSE: There is an increasing demand for medical physicist to calculate peak skin dose (PSD) for interventional fluoroscopy procedures. The dose information (Dose-Area-Product and Air Kerma) displayed in the console cannot directly be used for this purpose. Our clinical experience shows that the use of the existing methods may overestimate or underestimate PSD. This study attempts to develop a direct estimate of PSD from the displayed dose metrics. METHODS: An anthropomorphic torso phantom was used for dose measurements for a common fluoroscopic procedure...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048097/mo-fg-campus-iep1-04-kerma-area-product-calculation-for-non-uniform-x-ray-fields-using-a-skin-dose-tracking-system
#13
S Vijayan, Z Xiong, S Rudin, D Bednarek
PURPOSE: The functionality of the Dose-Tracking System (DTS) has been expanded to include the calculation of the Kerma-Area Product (KAP) for non-uniform x-ray fields such as result from the use of compensation filters during fluoroscopic procedures METHODS: The DTS calculates skin dose during fluoroscopic interventions and provides a color-coded dose map on a patient-graphic model. The KAP is the integral of air kerma over the x-ray field and is usually measured with a transmission-ionization chamber that intercepts the entire x-ray beam...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047939/tu-h-campus-iep1-03-comparison-of-monte-carlo-simulation-and-conversion-factor-based-method-on-estimation-of-effective-dose-in-pediatric-patients-undergoing-interventional-cardiac-procedures
#14
K Leung, M Wong, Y Ng, S Lee, R Ming Chun Chau, F Lee
PURPOSE: Interventional cardiac procedures utilize frequent fluoroscopy and cineangiography, which impose considerable radiation risk to patients, especially pediatric patients. Accurate calculation of effective dose is important in order to estimate cancer risk over the rest of their lifetime. This study evaluates the difference in effective dose calculated by Monte Carlo simulation with those estimated by locally-derived conversion factors (CF-local) and by commonly quoted conversion factors from Karambatsakidou et al (CF-K)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047030/su-g-iep3-05-effects-of-image-receptor-technology-and-dose-reduction-software-on-radiation-dose-estimates-for-fluoroscopically-guided-interventional-fgi-procedures
#15
Z Merritt, J Dave, D Eschelman, C Gonsalves
PURPOSE: To investigate the effects of image receptor technology and dose reduction software on radiation dose estimates for most frequently performed fluoroscopically-guided interventional (FGI) procedures at a tertiary health care center. METHODS: IRB approval was obtained for retrospective analysis of FGI procedures performed in the interventional radiology suites between January-2011 and December-2015. This included procedures performed using image-intensifier (II) based systems which were subsequently replaced, flat-panel-detector (FPD) based systems which were later upgraded with ClarityIQ dose reduction software (Philips Healthcare) and relatively new FPD system already equipped with ClarityIQ...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046941/su-g-iep3-13-real-time-patient-and-staff-dose-monitoring-in-fluoroscopy-guided-interventions
#16
L Vergoossen, A Sailer, L Paulis, J Wildberger, C Jeukens
PURPOSE: Interventional radiology procedures involve the use of X-rays, which can pose a large radiation burden on both patients and staff. Although some reports on radiation dose are available, most studies focus on limited types of procedures and only report patient dose. In our cathlabs a dedicated real-time patient and staff monitoring system was installed in November 2015. The aim of this study was to investigate the patient and staff dose exposure for different types of interventions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28039835/toxicokinetics-of-chlordecone-in-goats-implications-for-risk-management-in-french-west-indies
#17
Agnès Fournier, Cyril Feidt, Marie-Laure Lastel, Harry Archimede, Jean-Pierre Thome, Maurice Mahieu, Guido Rychen
The former use of chlordecone (CLD) in the French West Indies has resulted in long-term pollution of soils. CLD is known to be potentially transferred towards animal products of animals reared outdoors, mainly through accidental soil ingestion. Several studies indicate that soil bound CLD is bioavailable when administered to farm animals. Currently there is a need to quantify the level of CLD absorption and its toxicokinetic characteristics in the ruminant and particularly in the goat. These are considered as important farm species in the French West Indies...
December 13, 2016: Chemosphere
https://www.readbyqxmd.com/read/28039722/screening-for-antitumor-activity-of-various-plant-extracts-on-hela-and-c-4-i-cell-lines
#18
Gul Ozcan, Ozlem Dagdeviren Ozsoylemez, Gizem Akman, Walid Khalilia, Beliz Tezel Yetiz, Ali Karagoz, Gulay Melikoglu, Sezin Anil, Sukran Kultur, Nurhayat Sutlupinar
PURPOSE: Cancer is a long process that leads the organism to death and is associated with the normal cells acquiring the ability to divide permanently. Nowadays, the use of natural products in cancer therapy has a great importance. In addition, working with plants that are endemic to Turkey and determining the biological activities of these plant extracts, is extremely important due to the potential for new drug development. There is no comparative study available in the literature on the antitumor effects of Colchicum sanguicolle, a new found species of the genus Colchicum in Turkey, Crateagus microphylla, of the genus Crateagus and Centaurea antiochia of the genus Centaurea...
November 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28034700/establishing-local-diagnostic-reference-levels-in-ir-procedures-with-dose-management-software
#19
Christina Heilmaier, Niklaus Zuber, Christian Berthold, Levent Kara, Dominik Weishaupt
PURPOSE: To obtain local diagnostic reference levels (DRLs) in diagnostic and therapeutic IR procedures with dose management software to improve radiation protection. MATERIALS AND METHODS: Dose data of various vascular and nonvascular IR procedures performed within 18 months were collected and analyzed with dose management software. To account for different levels of complexity, procedures were subdivided into simple, standard, and difficult procedures as graded by interventional radiologists...
December 26, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28032521/the-influence-of-direct-compression-powder-blend-transfer-method-from-the-container-to-the-tablet-press-on-product-critical-quality-attributes-a-case-study
#20
Michał Teżyk, Emilia Jakubowska, Kasylda Milczewska, Bartłomiej Milanowski, Adam Voelkel, Janina Lulek
OBJECTIVE: The aim of this article is to compare the gravitational powder blend loading method to the tablet press and manual loading in terms of their influence on tablets' critical quality attributes (CQA). SIGNIFICANCE: The results of the study can be of practical relevance to the pharmaceutical industry in the area of direct compression of low dose formulations, which could be prone to content uniformity issues. METHODS: In the preliminary study particle size distribution and surface energy of raw materials were determined using laser diffraction method and inverse gas chromatography, respectively...
December 29, 2016: Drug Development and Industrial Pharmacy
keyword
keyword
57700
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"