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https://www.readbyqxmd.com/read/28102960/nine-degrees-of-freedom-flexmap-for-a-cone-beam-computed-tomography-imaging-device-with-independently-movable-source-and-detector
#1
Peter Keuschnigg, Daniel Kellner, Karl Fritscher, Andrea Zechner, Ulrich Mayer, Philipp Huber, Felix Sedlmayer, Heinz Deutschmann, Philipp Steininger
PURPOSE: Couch-mounted cone-beam computed tomography (CBCT) imaging devices with independently rotatable x-ray source and flat-panel detector arms for acquisitions of arbitrary regions of interest (ROI) have recently been introduced in image-guided radiotherapy (IGRT). This work analyzes mechanical limitations and gravity-induced effects influencing the geometric accuracy of images acquired with arbitrary angular constellations of source and detector in nonisocentric trajectories, which is considered essential for IGRT...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102946/a-portal-dosimetry-dose-prediction-method-based-on-collapsed-cone-algorithm-using-the-clinical-beam-model
#2
J Martínez Ortega, N Gómez González, P Castro Tejero, M Pinto Monedero, N B Tolani, L Núñez Martín, R Sánchez Montero
PURPOSE: Amorphous silicon electronical portal imaging devices (EPIDs) are widely used for dosimetric measurements in Radiation Therapy. The purpose of this work was to determine if a portal dose prediction method can be utilized for dose map calculations based on the linear accelerator model within a commercial treatment planning system (Pinnacle(3) v8.0 m). METHODS: The method was developed for a 6 MV photon beam on the Varian Clinac 21-EX, at a nominal dose rate of 400 MU/min...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102887/clinical-trial-of-nintedanib-in-patients-with-recurrent-or-metastatic-salivary-gland-cancer-of-the-head-and-neck-a-multicenter-phase-2-study-korean-cancer-study-group-hn14-01
#3
Youjin Kim, Su Jin Lee, Ji Yun Lee, Se-Hoon Lee, Jong-Mu Sun, Keunchil Park, Ho Jung An, Jae Yong Cho, Eun Joo Kang, Ha-Young Lee, Jinsoo Kim, Bhumsuk Keam, Hye Ryun Kim, Kyoung Eun Lee, Moon Young Choi, Ki Hyeong Lee, Myung-Ju Ahn
BACKGROUND: Salivary gland cancers (SGCs) are uncommon and account for less than 5% of all head and neck cancers, but they are histologically heterogeneous. No specific therapy, including targeted agents, has consistently improved clinical outcomes in recurrent/metastatic SGC. Recent studies suggest that vascular endothelial growth factor receptor (VEGFR) and platelet-derived growth factor receptor (PDGFR) play important roles in SGC. Nintedanib is a potent small-molecule, triple-receptor tyrosine kinase inhibitor (VEGFR1, VEGFR2, and VEGFR3; fibroblast growth factor receptor 1 [FGFR1], FGFR2, and FGFR3; and PDGFRα and PDGFRß)...
January 19, 2017: Cancer
https://www.readbyqxmd.com/read/28102546/ataluren-and-similar-compounds-specific-therapies-for-premature-termination-codon-class-i-mutations-for-cystic-fibrosis
#4
REVIEW
Aisha A Aslam, Colin Higgins, Ian P Sinha, Kevin W Southern
BACKGROUND: Cystic fibrosis is a common life-shortening genetic disorder in the Caucasian population (less common in other ethnic groups) caused by the mutation of a single gene that codes for the production of the cystic fibrosis transmembrane conductance regulator protein. This protein coordinates the transport of salt (and bicarbonate) across cell surfaces and the mutation most notably affects the airways. In the lungs of people with cystic fibrosis, defective protein results in a dehydrated surface liquid and compromised mucociliary clearance...
January 19, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28102464/a-phase-i-and-pharmacokinetic-study-of-afilbercept-with-folfiri-comparison-of-chinese-and-caucasian-populations
#5
Jianming Xu, Yingxin Li, Xing Sun, Dongsheng Zhang, Rongrui Liu, Samira Ziti-Ljajic, Dongmei Shi, Fengying Xue, Nathalie Le Bail, Ruihua Xu
Background This study assessed the preliminary safety, pharmacokinetics (PK) and anti-tumor effects of aflibercept in combination with 5-fluorouracil, leucovorin and irinotecan (FOLFIRI) in Chinese patients with previously-treated advanced solid malignancies. Patients and Methods This open-label single-arm Phase I study conducted at two centers in China included adult (≥18 years) patients with metastatic or unresectable solid malignancies who had received ≥1 prior treatment. Patients received aflibercept 4 mg/kg IV on Day 1 followed by FOLFIRI over Days 1 and 2 every 2 weeks, and were assessed for safety, tumor response, PK parameters and immunogenicity...
January 19, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28102427/prospective-randomised-trial-of-the-time-dependent-antiplatelet-effects-of-500-mg-and-250-mg-acetylsalicylic-acid-i-%C3%A2-v-and-300-mg-p-%C3%A2-o-in-acs-acute
#6
Uwe Zeymer, Thomas Hohlfeld, Jürgen Vom Dahl, Raimund Erbel, Thomas Münzel, Ralf Zahn, Alexander Roitenberg, Stefanie Breitenstein, Ákos Ferenc Pap, Dietmar Trenk
Little is known about the onset of action after intravenous or oral administration of acetylsalicylic acid (ASA) in patients with acute coronary syndromes (ACS). The aim of the study was to compare intravenous 250 or 500 mg acetylsalicylic acid (ASA) with oral 300 mg in ASA naïve patients with ACS concerning the onset of antiplatelet effects measured by time dependent thromboxane inhibition. A total of 270 patients with ACS < 24 hours were randomised into one of three treatment arms comprising administration of a single dose of ASA as soon as possible after admission...
January 19, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28102361/effectiveness-and-tolerability-of-different-recommended-doses-of-ppis-and-h2ras-in-gerd-network-meta-analysis-and-grade-system
#7
Chao Zhang, Joey S W Kwong, Rui-Xia Yuan, Hao Chen, Chang Xu, Yi-Pin Wang, Gong-Li Yang, Jin-Zhu Yan, Le Peng, Xian-Tao Zeng, Hong Weng, Jie Luo, Yu-Ming Niu
Proton pump inhibitors (PPIs) and histamine-2-receptor antagonists (H2RAs) are used for gastro-esophageal reflux disease (GERD); however, the clinical evidence for treatment is poor. We evaluated the effectiveness and tolerability of different doses of PPIs, H2RAs and placebo in adults with GERD. Six online databases were searched through September 1, 2016. All related articles were included and combined with a Bayesian network meta-analysis from randomized controlled trials (RCTs). The GRADE systems were employed to assess the main outcome...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102309/integration-of-visual-and-joint-information-to-enable-linear-reaching-motions
#8
Henry Eberle, Slawomir J Nasuto, Yoshikatsu Hayashi
A new dynamics-driven control law was developed for a robot arm, based on the feedback control law which uses the linear transformation directly from work space to joint space. This was validated using a simulation of a two-joint planar robot arm and an optimisation algorithm was used to find the optimum matrix to generate straight trajectories of the end-effector in the work space. We found that this linear matrix can be decomposed into the rotation matrix representing the orientation of the goal direction and the joint relation matrix (MJRM) representing the joint response to errors in the Cartesian work space...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102105/pitching-form-determines-probabilistic-structure-of-errors-in-pitch-location
#9
Masahiro Shinya, Shinji Tsuchiya, Yousuke Yamada, Kimitaka Nakazawa, Kazutoshi Kudo, Shingo Oda
According to recent motor control studies, it is important to know probabilistic structure of his/her own motor errors to choose an optimal motor plan (i.e., where you aim at) to maximise the expected gain. In this study, we questioned if pitching form determines the probabilistic structure of pitching errors in baseball pitchers. Eighteen collegiate baseball pitchers with various pitching forms including right- and left-handed overarm, sidearm and underarm throwers threw 100 pitches aiming at a target located 90 cm above the ground...
January 19, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28102014/phonetic-analysis-during-treatment-with-rapid-maxillary-expander
#10
E Biondi, A Bandini, L Lombardo, S Orlandi, G Siciliani, C Manfredi
OBJECTIVES: To investigate possible changes and/or device-related impairments in phonetic habits produced by rapid maxillary expansion (RME). MATERIALS AND METHODS: Thirty-five patients scheduled for RME were divided into two groups: Group A (banded two-arm Hyrax) and Group B (banded four-arm Hyrax). Speech samples were collected at six time points, before, during and after RME removal. Acoustical analysis was performed using PRAAT and BioVoice analysis tools. Ten volunteers completed a questionnaire on the acceptability of patient's speech...
February 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28101937/methods-of-anorectal-manometry-vary-widely-in-clinical-practice-results-from-an-international-survey
#11
E V Carrington, H Heinrich, C H Knowles, S S Rao, M Fox, S M Scott
BACKGROUND: Ano-rectal manometry (ARM) is the most commonly performed investigation for assessment of anorectal dysfunction. Its use is supported by expert consensus documents and international guidelines. Variation in technology, data acquisition, and analysis affect results and clinical interpretation. This study examined variation in ARM between institutions to establish the status of current practice. METHODS: A 50-item web-based questionnaire assessing analysis and interpretation of ARM was distributed by the International Anorectal Physiology Working Group via societies representing practitioners that perform ARM...
January 18, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28101887/abiraterone-or-enzalutamide-in-advanced-castration-resistant-prostate-cancer-an-indirect-comparison
#12
Akhil Chopra, Mina Georgieva, Gilberto Lopes, Chong Ming Yeo, Benjamin Haaland
BACKGROUND: To perform a comparative effectiveness analyses between enzalutamide and abiraterone acetate in both the pre-docetaxel and post-docetaxel settings based on published phase III randomized trials. METHODS: The primary measure of efficacy was the posterior probability that enzalutamide outperforms abiraterone acetate (AA) with prednisone in terms of overall survival (OS) on average. Indirect meta-estimates were generated from four randomized studies in the context of a Bayesian hierarchical model with study-specific efficacy estimates meta-analyzed on the log scale...
January 19, 2017: Prostate
https://www.readbyqxmd.com/read/28101879/private-sector-involvement-in-times-of-armed-conflict-what-are-the-constraints-for-trading-medical-equipment
#13
Georg Schmidt
OBJECTIVE: Today, healthcare facilities are highly dependent on the private sector to keep their medical equipment functioning. Moreover, private sector involvement becomes particularly important for the supply of spare parts and consumables. However, in times of armed conflict, the capacity of the corporate world appears to be seriously hindered. Subsequently, this study researches the influence of armed conflict on the private medical equipment sector. DESIGN: This study follows a qualitative approach by conducting 19 interviews with representatives of the corporate world in an active conflict zone...
November 2016: Journal of Emergency Management: JEM
https://www.readbyqxmd.com/read/28101814/arbutus-andrachne-l-reverses-sleep-deprivation-induced-memory-impairments-in-rats
#14
Karem H Alzoubi, Bayan S Malkawi, Omar F Khabour, Tamam El-Elimat, Feras Q Alali
Sleep deprivation (SD) is associated with cognitive deficits. It was found to affect the hippocampus region of the brain by impairing memory formation. This impairment is suggested to be caused by elevation in oxidative stress in the body, including the brain during SD. It was hypothesized that the methanolic extract of the fruits of Arbutus andrachne L. (Ericaceae) will prevent chronic SD-induced impairment of hippocampal memory via its antioxidative properties. The methanolic extract of the fruits of A. andrachne was evaluated for its beneficial properties to reverse SD-induced cognitive impairment in rats...
January 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28101677/emesis-and-nausea-related-to-single-agent-trabectedin-in-ovarian-cancer-patients-a-sub-study-of-the-mito15-project
#15
Marilena Di Napoli, Chiara Della Pepa, Laura Arenare, Giovanni Scambia, Domenica Lorusso, Francesco Raspagliesi, Gabriella Ferrandina, Vanda Salutari, Roberto Sorio, Anna Maria Mosconi, Giorgia Mangili, Lucia Borgato, Stefano Lepori, Angela Salvino, Sandro Pignata, Sabrina Chiara Cecere
The MITO 15 was a prospective, single-arm trial, evaluating trabectedin monotherapy in patients with recurrent ovarian cancer (OC) who were BRCA mutation-carriers or had a BRCAness phenotype. It is largely reported that trabectedin may induce nausea and vomiting but the real emetogenic potential of the drug, in the different schedules, has never been fully described; furthermore, OC patients are known to have an enhanced risk of developing nausea and vomiting due to female gender, abdominal spreading of the disease, and major surgery experienced by most of them...
January 19, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28101624/the-safety-and-efficacy-of-cardiac-contractility-modulation-in-heart-failure-a%C3%A2-meta-analysis-of-clinical-trials
#16
X Liu, H J Yang, H Q Ping, S Qiu, S Shi, B Yang
BACKGROUND: Cardiac contractility modulation (CCM) has developed as a promising treatment device for heart failure (HF). This meta-analysis aimed at systematically reviewing the latest available published trials to provide evidence on the safety and efficacy of CCM in patients with HF. METHODS: We searched the Cochrane Central Resister of Controlled Trials, PubMed, and EMBASE in May 2016 to identify eligible clinical trials comparing CCM with sham treatment or with usual care...
January 18, 2017: Herz
https://www.readbyqxmd.com/read/28101567/influence-of-arm-crank-ergometry-on-development-of-lymphedema-in-breast-cancer-patients-after-axillary-dissection-a-randomized-controlled-trail
#17
Thorsten Schmidt, Jette Berner, Walter Jonat, Burkhard Weisser, Christioph Röcken, Marion van Mackelenbergh, Christoph Mundhenke
OBJECTIVE: To investigate the safety and efficacy of arm crank ergometry in breast cancer patients after axillary lymph node dissection, with regard to changes in bioelectrical impedance analysis, arm circumference, muscular strength, quality of life and fatigue. DESIGN: Randomized controlled clinical intervention trial. SUBJECTS: Forty-nine patients with breast cancer after axillary lymph node dissection. METHODS: Arm crank ergometer training twice-weekly was compared with usual care over 12 weeks...
January 19, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28101563/world-health-organisation-global-disability-action-plan-2014-2021-challenges-and-perspectives-for-physical-medicine-and-rehabilitation-in-pakistan
#18
Fary Khan, Bhasker Amatya, Tahir M Sayed, Aamir W Butt, Khalid Jamil, Waseem Iqbal, Alaeldin Elmalik, Farooq A Rathore, Geoff Abbott
OBJECTIVE: To provide an update on disability and outline potential barriers and facilitators for implementation of the World Health Organization Global Disability Action Plan (GDAP) in Pakistan. METHODS: A 6-day workshop at the Armed Forces Institute of Rehabilitation Medicine, Islamabad facilitated by rehabilitation staff from Royal Melbourne Hospital, Australia. Local healthcare professionals (n = 33) from medical rehabilitation facilities identified challenges in service provision, education and attitudes/approaches to people with disabilities, using consensus agreement for objectives listed in the GDAP...
January 19, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28101483/intermittent-theta-slowings-in-contralateral-side-of-weakness-after-sleep-deprivation-on-spot-eeg-in-sporadic-hemiplegic-migraine
#19
Chan-Hyuk Lee, Man-Wook Seo, Byoung-Soo Shin, Tae-Ho Yang, Hyun-June Shin, Han Uk Ryu
Hemiplegic migraine (HM) is an uncommon type of migraine which is classified into sporadic and familial subtype. The noticed electroencephalogram (EEG) findings during HM attack are diffuse slowing contralateral to the weakened limb, but are usually normal in asymptomatic states. A 52-year-old woman who suffered from headache accompanying right arm weakness and aphasic symptoms admitted to our hospital. She underwent total five times of EEG including 2 times before admission. Only the last EEG exam after 24 hours of sleep deprivation (SD) showed intermittent slowing and higher amplitude of positive occipital sharp transients (POSTs) on the left parieto-occipital area...
December 2016: Journal of Epilepsy Research
https://www.readbyqxmd.com/read/28101421/structural-and-functional-human-retinal-imaging-with-a-fiber-based-visible-light-oct-ophthalmoscope
#20
Shau Poh Chong, Marcel Bernucci, Harsha Radhakrishnan, Vivek J Srinivasan
The design of a multi-functional fiber-based Optical Coherence Tomography (OCT) system for human retinal imaging with < 2 micron axial resolution in tissue is described. A detailed noise characterization of two supercontinuum light sources with different pulse repetition rates is presented. The higher repetition rate and lower noise source is found to enable a sensitivity of 96 dB with 0.15 mW light power at the cornea and a 98 microsecond exposure time. Using a broadband (560 ± 50 nm), 90/10, fused single-mode fiber coupler designed for visible wavelengths, the sample arm is integrated into an ophthalmoscope platform, similar to current clinical OCT systems...
January 1, 2017: Biomedical Optics Express
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