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https://www.readbyqxmd.com/read/28068190/er-yag-laser-irradiation-induces-behavioral-changes-in-v-harveyi
#1
Idan Redenski, Sharonit Sahar-Helft, Adam Stabholz, Doron Steinberg
OBJECTIVES: Laser technologies have many different applications in medical, agricultural, and industrial fields. Studies have shown several effects of laser energy on different bacterial species, in a wide variety of settings. Recent reports have found that one of the unique features of bacteria is their ability to communicate among themselves (quorum sensing). We sought to investigate whether low-energy laser irradiation affects bacterial behavior, which is regulated by quorum sensing...
January 9, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28067461/phagocytosis-and-immune-response-studies-of-macrophage-nanodiamond-interactions-in-vitro-and-in-vivo
#2
K-J Huang, C-Y Lee, Y-C Lin, C-Y Lin, E Perevedentseva, S-F Hung, C-L Cheng
The applications of nanodiamond as drug delivery and bio-imaging can require the relinquishing ND-drug conjugate via blood flow, where interaction with immune cells may occur. In this work, we investigated the ND penetration in macrophage and the immune response using the tissue-resident murine macrophages (RAW 264.7). Confocal fluorescence imaging, immunofluorescence analysis of nuclear translocation of interferon regulatory factor IRF-3 and transcriptional factor NF-κΒ, analysis of pro-inflammatory cytokines production IL-1β, IL-6 IL-10 with a reverse transcription-polymerase chain reaction technique were applied...
January 9, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28065953/self-evaluation-of-ethical-review-committees-functioning-at-foundation-university-medical-college-fumc-through-structured-constitution-practice-outcome-cpo-assessment-model
#3
Sadia Ahsin, Gul E Naghma Saeed
OBJECTIVE: To assess the operational efficiency of the ethical review committee of a medical college. METHODS: This study was conducted at the Foundation University Medical College, Islamabad, Pakistan, from 2012 to 2014. On the basis of literature review, methods for assessment of various features of ethical review committee were studied. A constitution-practice-outcome measurement model for evaluation of ethical review committee assessment process was developed...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28051973/legal-blood-alcohol-testing-in-the-u-s-military
#4
Peter L Platteborze, Kelly W Wilhelms
OBJECTIVE: To retrospectively analyze multiple years of legal blood alcohol test (LBAT) results as part of a laboratory process improvement plan. METHODS: We analyzed the LBAT requests received by the Brooke Army Medical Center during calendar years 2013 and 2014. RESULTS: We received 365 samples from 11 installations; 351 were tested and 14 were rejected. Nearly one-third of the tested samples had negligible ethanol levels. One installation was responsible for submitting 10 rejected samples which prompted laboratory intervention...
January 2017: Military Medicine
https://www.readbyqxmd.com/read/28050623/clinical-relevance-of-the-stopp-start-criteria-in-hip-fracture-patients
#5
Johan Lönnbro, Susanna M Wallerstedt
PURPOSE: The aim of this study was to investigate the clinical relevance of potentially inappropriate medications (PIMs), identified by the STOPP criteria, and potential prescribing omissions (PPOs), identified by the START criteria, and to identify predictors for clinically relevant PIMs and PPOs. METHODS: The STOPP and START criteria were applied on the medication lists of 200 older hip fracture patients, consecutively recruited to a randomized controlled study in 2009...
January 3, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28048879/su-f-t-656-monte-carlo-study-on-air-activation-around-a-medical-electron-linac
#6
F Horst, G Fehrenbacher, K Zink
PURPOSE: In high energy photon therapy, several radiation protection issues result from photonuclear reactions. The activation of air - directly by photonuclear reactions as well as indirectly by capture of photoneutrons generated inside the linac head - is a major point of concern for the medical staff. The purpose of this study was to estimate the annual effective dose to medical workers due to activated air around a medical high energy electron linac by means of Monte Carlo simulations...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048838/su-f-i-36-in-utero-dose-measurements-within-postmortem-subjects-for-estimating-fetal-doses-in-pregnant-patients-examined-with-pulmonary-embolism-trauma-and-appendicitis-ct
#7
I Lipnharski, N Quails, C Carranza, N Correa, S Bidari, M Bickelhaup, L Rill, M Arreola
PURPOSE: The imaging of pregnant patients is medically necessary in certain clinical situations. The purpose of this work was to directly measure uterine doses in a cadaver scanned with CT protocols commonly performed on pregnant patients in order to estimate fetal dose and assess potential risk. METHOD: One postmortem subject was scanned on a 320-slice CT scanner with standard pulmonary embolism, trauma, and appendicitis protocols. All protocols were performed with the scan parameters and ranges currently used in clinical practice...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048485/su-d-bra-05-time-series-analysis-of-epid-images-to-identify-patients-in-need-of-treatment-adaptation
#8
L Archambault, O Piron, N Varfalvy
PURPOSE: to evaluate if time series analysis of portal dose images can be used to identify patients undergoing important anatomical changes. METHODS: daily EPID images of every treatment fields were acquired for 48 patients treated for lung cancer. In addition, CBCT were acquired on a regular basis (weekly or biweekly). Gamma analysis was performed relative to the first fraction given that no significant anatomical change was observed on the CBCT of the first fraction compared to the planning CT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048442/su-d-206-02-evaluation-of-partial-storage-of-the-system-matrix-for-cone-beam-computed-tomography-using-a-gpu-platform
#9
D Matenine, G Cote, J Mascolo-Fortin, Y Goussard, P Despres
PURPOSE: Iterative reconstruction algorithms in computed tomography (CT) require a fast method for computing the intersections between the photons' trajectories and the object, also called ray-tracing or system matrix computation. This work evaluates different ways to store the system matrix, aiming to reconstruct dense image grids in reasonable time. METHODS: We propose an optimized implementation of the Siddon's algorithm using graphics processing units (GPUs) with a novel data storage scheme...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048090/su-g-bra-06-quantification-of-tracking-performance-of-a-multi-layer-electronic-portal-imaging-device
#10
Y Hu, J Rottmann, M Myronakis, R Berbeco
PURPOSE: The purpose of this study was to quantify the improvement in tumor tracking, with and without fiducial markers, afforded by employing a multi-layer (MLI) electronic portal imaging device (EPID) over the current state-of-the-art, single-layer, digital megavolt imager (DMI) architecture. METHODS: An ideal observer signal-to-noise ratio (d') approach was used to quantify the ability of an MLI EPID and a current, state-of-the-art DMI EPID to track lung tumors from the treatment beam's-eye-view...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047790/su-f-t-507-modeling-cerenkov-emissions-from-medical-linear-accelerators-a-monte-carlo-study
#11
Z Shrock, M Oldham, J Adamson
PURPOSE: Cerenkov emissions are a natural byproduct of MV radiotherapy but are typically ignored as inconsequential. However, Cerenkov photons may be useful for activation of drugs such as psoralen. Here, we investigate Cerenkov radiation from common radiotherapy beams using Monte Carlo simulations. METHODS: GAMOS, a GEANT4-based framework for Monte Carlo simulations, was used to model 6 and 18MV photon beams from a Varian medical linac. Simulations were run to track Cerenkov production from these beams when irradiating a 50cm radius sphere of water...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047317/su-f-t-235-optical-scan-based-collision-avoidance-using-multiple-stereotactic-cameras-during-simulation
#12
R Cardan, R Popple, M Dobelbower, J De Los Santos, J Fiveash
PURPOSE: To demonstrate the ability to quickly generate an accurate collision avoidance map using multiple stereotactic cameras during simulation. METHODS: Three Kinect stereotactic cameras were placed in the CT simulation room and optically calibrated to the DICOM isocenter. Immediately before scanning, the patient was optically imaged to generate a 3D polygon mesh, which was used to calculate the collision avoidance area using our previously developed framework...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047289/tu-ab-bra-11-indications-for-online-adaptive-radiotherapy-based-on-dosimetric-consequences-of-interfractional-pancreas-to-duodenum-motion-in-mri-guided-pancreatic-radiotherapy
#13
K Mittauer, S Rosenberg, M Geurts, M Bassetti, I Chen, L Henke, J Olsen, R Kashani, A Wojcieszynski, P Harari, Z Labby, P Hill, B Paliwal, P Parikh, J Bayouth
PURPOSE: Dose limiting structures, such as the duodenum, render the treatment of pancreatic cancer challenging. In this multi-institutional study, we assess dosimetric differences caused by interfraction pancreas-to-duodenum motion using MR-IGRT to determine the potential impact of adaptive replanning. METHODS: Ten patients from two institutions undergoing MRI-guided radiotherapy with conventional fractionation (n=5) or SBRT (n=5) for pancreatic cancer were included...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047196/th-ab-207a-11-anatomical-and-functional-assessment-of-coronary-artery-disease-using-low-dose-whole-organ-dynamic-computed-tomography
#14
L Hubbard, B Ziemer, J Lipinski, S Malkasian, B Sadeghi, H Javan, B Dertli, E M Groves, S Molloi
PURPOSE: To evaluate the accuracy of a low-dose, first-pass-analysis (FPA) dynamic computed tomography angiography and perfusion (CTAP) technique, for whole-organ anatomical and functional assessment of coronary artery disease (CAD). METHODS: An angioplasty balloon was advanced into the left anterior descending (LAD) coronary artery of five swine (35-45 kg) to induce several levels of stenosis at maximal hyperemia (intracoronary adenosine, 240 µg/min). Reference fluorescence microspheres and intravenous contrast (370 mg/mL iodine, 25 mL, 7 mL/s) were injected centrally and dynamic imaging was performed using a 320-slice CT scanner at 100 kVp and 200 mA...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045992/self-care-practices-among-diabetes-patients-in-addis-ababa-a-qualitative-study
#15
Dagmawit Tewahido, Yemane Berhane
BACKGROUND: Self-care practices that include self-monitoring of blood sugar level, diet management, physical exercise, adherence to medications, and foot care are the cornerstones of diabetes management. However, very little is known about self-care in developing countries where the prevalence of diabetes is increasing. OBJECTIVE: The objective of this study was to describe self-care practices among individuals with type II diabetes in Addis Ababa, Ethiopia. METHODS: A qualitative method was used to gather data from type II diabetes patients...
2017: PloS One
https://www.readbyqxmd.com/read/28039126/are-olympic-athletes-free-from-cardiovascular-diseases-systematic-investigation-in-2352-participants-from-athens-2004-to-sochi-2014
#16
Antonio Pelliccia, Paolo Emilio Adami, Filippo Quattrini, Maria Rosaria Squeo, Stefano Caselli, Luisa Verdile, Viviana Maestrini, Fernando Di Paolo, Cataldo Pisicchio, Roberto Ciardo, Antonio Spataro
CONTEXT: Olympic athletes represent model of success in our society, by enduring strenuous conditioning programmes and achieving astonishing performances. They also raise scientific and clinical interest, with regard to medical care and prevalence of cardiovascular (CV) abnormalities. OBJECTIVE: Our aim was to assess the prevalence and type of CV abnormalities in this selected athlete's cohort. DESIGN, SETTING AND PARTICIPANTS: 2352 Olympic athletes, mean age 25±6, 64% men, competing in 31 summer or 15 winter sports, were examined with history, physical examination, 12-lead and exercise ECG and echocardiography...
December 30, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28017813/association-between-state-medical-malpractice-environment-and-postoperative-outcomes-in-the-united-states
#17
Christina A Minami, Catherine R Sheils, Emily Pavey, Jeanette W Chung, Jonah J Stulberg, David D Odell, Anthony D Yang, David J Bentrem, Karl Y Bilimoria
BACKGROUND: The U.S. medical malpractice system assumes that the threat of liability should deter negligence but it is unclear whether malpractice environment impacts healthcare quality. We thus sought to explore the association between state malpractice environment and post-operative complication rates. STUDY DESIGN: This observational study included Medicare fee-for-service beneficiaries undergoing one of the following surgeries in 2010: colorectal, lung, esophageal, or pancreatic resection, total knee arthroplasty, craniotomy, gastric bypass, abdominal aortic aneurysm repair, coronary artery bypass grafting, or cystectomy...
December 22, 2016: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28009699/a-6-year-case-control-study-of-the-presentation-and-clinical-sequelae-for-noninflicted-negligent-and-inflicted-pediatric-burns
#18
Zachary J Collier, Veena Ramaiah, Jill C Glick, Lawrence J Gottlieb
Inflicted burns are one of the leading causes of abuse-related fatalities in children. Between 30 and 60% of children accidentally returned to abusive homes suffer reabuse. Given the high chance for abuse recurrence and the associated morbidity/mortality, it is critical that inflicted burns are promptly identified to guide appropriate medical and child welfare management. Although previous studies proposed historical and mechanistic features using noncomparative or poorly powered data, this study utilized comparative data from a 6-year period (2009-2014) at a certified burn center along with expert analysis from Child Advocacy and Protective Services (CAPS) to provide higher level evidence supporting classical findings while elucidating new features with respect to burn severity and required interventions...
January 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28004997/effect-of-long-term-low-dose-aspirin-therapy-on-renal-graft-function
#19
Hatem Ali, Ahmed Shaaban, Asam Murtaza, Laura E Howell, Aimun Ahmed
OBJECTIVES: Despite improvements in immunosuppressive protocols for renal transplant, long-term success of renal transplant is still limited by the occurrence of interstitial fibrosis and tubular atrophy. Some studies have shown that aspirin decreases the severity of kidney ischemia-reperfusion injury and the development of tubular atrophy in animal models. This study aimed to assess the effects of aspirin therapy started at the time of transplant on long-term graft function. MATERIALS AND METHODS: We compared renal graft function of 82 patients on low-dose aspirin 75 mg once daily who underwent renal transplant between 1 January 2000 and 31 December 2010 from a single center with 65 patients not taking aspirin...
December 22, 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27998170/accuracy-of-femur-reconstruction-from-sparse-geometric-data-using-a-statistical-shape-model
#20
Ju Zhang, Thor F Besier
Sparse geometric information from limited field-of-view medical images is often used to reconstruct the femur in biomechanical models of the hip and knee. However, the full femur geometry is needed to establish boundary conditions such as muscle attachment sites and joint axes which define the orientation of joint loads. Statistical shape models have been used to estimate the geometry of the full femur from varying amounts of sparse geometric information. However, the effect that different amounts of sparse data have on reconstruction accuracy has not been systematically assessed...
December 21, 2016: Computer Methods in Biomechanics and Biomedical Engineering
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