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Showing 1-20 of 2,010 results
  1. The iterative bisection procedure: a useful tool for determining parameter values in data-generating processes in Monte Carlo simulations

    Background

    Data-generating processes are key to the design of Monte Carlo simulations. It is important for investigators to be able to simulate data...

    Article Open access 17 February 2023
  2. Quantitative validation of Monte Carlo SPECT simulation: application to a Mediso AnyScan GATE simulation

    Background

    Monte Carlo (MC) simulations are used in nuclear medicine imaging as they provide unparalleled insight into processes that are not directly...

    Sophia Pells, David M. Cullen, ... Andrew P. Robinson in EJNMMI Physics
    Article Open access 30 September 2023
  3. Monte Carlo modelling of a compact CZT-based gamma camera with application to 177Lu imaging

    Background

    Semiconductor gamma-camera systems based on cadmium zinc telluride (CZT) detectors present new challenges due to an energy-response that...

    Daniel Roth, Erik Larsson, ... Katarina Sjögreen Gleisner in EJNMMI Physics
    Article Open access 08 May 2022
  4. Heterogeneity estimation in meta-analysis of standardized mean differences when the distribution of random effects departs from normal: A Monte Carlo simulation study

    Background

    Advantages of meta-analysis depend on the assumptions underlying the statistical procedures used being met. One of the main assumptions...

    Desirée Blázquez-Rincón, Julio Sánchez-Meca, ... Manuel Suero in BMC Medical Research Methodology
    Article Open access 17 January 2023
  5. Inverse planning optimization with lead block effectively suppresses dose to the mandible in high-dose-rate brachytherapy for tongue cancer

    Purpose

    In this study, we developed in-house software to evaluate the effect of the lead block (LB)-inserted spacer on the mandibular dose in...

    Yuichi Akino, Hiroya Shiomi, ... Shumei Murakami in Japanese Journal of Radiology
    Article Open access 05 June 2023
  6. Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights

    Clinical information collected in electronic health records (EHRs) is becoming an essential source to emulate randomized experiments. Since patients...

    Sumeet Kalia, Olli Saarela, ... Michelle Greiver in BMC Medical Research Methodology
    Article Open access 07 January 2023
  7. Monte Carlo simulations of photodynamic therapy in human blood model

    This study aims to simulate a therapeutic plan for a normal human blood model under various patho-physiological conditions, such as the development...

    R. S. Alanazi, A. Laref in Lasers in Medical Science
    Article 28 August 2021
  8. Lead-free transparent shields for diagnostic X-rays: Monte Carlo simulation and measurements

    In recent years, the preference for using lead-free radiation protection shields has increased because of concerns regarding lead poisoning and...

    Milad Karimi, Karim Ghazikhanlou-sani, ... Hesameddin Mostaghimi in Radiological Physics and Technology
    Article 12 August 2020
  9. DVH-based inverse planning for LDR pancreatic brachytherapy

    Purpose

    Pancreatic cancer is one of the common types of malignant cancer. Low-dose-rate (LDR) brachytherapy has shown great efficacy in curing...

    Zeyang Zhou, Zhiyong Yang, ... Tao Zhu in International Journal of Computer Assisted Radiology and Surgery
    Article 16 December 2021
  10. Inverse probability weighting to handle attrition in cohort studies: some guidance and a call for caution

    Background

    Attrition in cohort studies challenges causal inference. Although inverse probability weighting (IPW) has been proposed to handle attrition...

    Marie-Astrid Metten, Nathalie Costet, ... Guillaume Chauvet in BMC Medical Research Methodology
    Article Open access 16 February 2022
  11. Non-linear probabilistic calibration of low-cost environmental air pollution sensor networks for neighborhood level spatiotemporal exposure assessment

    Background

    Low-cost sensor networks for monitoring air pollution are an effective tool for expanding spatial resolution beyond the capabilities of...

    Andrew Patton, Abhirup Datta, ... Kirsten Koehler in Journal of Exposure Science & Environmental Epidemiology
    Article 09 November 2022
  12. Emulation of a target trial with sustained treatment strategies: an application to prostate cancer using both inverse probability weighting and the g-formula

    As with many chronic illnesses, recurrent prostate cancer generally requires sustained treatment to prolong survival. However, initiating treatment...

    Louisa H. Smith, Xabier García-Albéniz, ... Miguel A. Hernán in European Journal of Epidemiology
    Article 26 October 2022
  13. Use of non-Gaussian time-of-flight kernels for image reconstruction of Monte Carlo simulated data of ultra-fast PET scanners

    Introduction

    Time-of-flight (TOF) positron emission tomography (PET) scanners can provide significant benefits by improving the noise properties of...

    Nikos Efthimiou, Kris Thielemans, ... Charalampos Tsoumpas in EJNMMI Physics
    Article Open access 19 June 2020
  14. Bayesian Mendelian randomization with an interval causal null hypothesis: ternary decision rules and loss function calibration

    We enhance the Bayesian Mendelian Randomization (MR) framework of Berzuini et al. (Biostatistics 21(1):86–101, 2018) by allowing for interval null...

    Linyi Zou, Teresa Fazia, ... Carlo Berzuini in BMC Medical Research Methodology
    Article Open access 27 January 2024
  15. Spatial-temporal Bayesian accelerated failure time models for survival endpoints with applications to prostate cancer registry data

    Prostate cancer is the most common cancer after non-melanoma skin cancer and the second leading cause of cancer deaths in US men. Its incidence and...

    Ming Wang, Zheng Li, ... Liangliang Zhang in BMC Medical Research Methodology
    Article Open access 08 April 2024
  16. Possibilities of simulation of coronavirus SARS-CoV-2 by using light scattering approach

    Issues related to human coronaviru s ( SARS CoV-2 ) are a burning topic of research in present times. Due to its easily contagious nature, real...

    Farhana Hussain, Nirmal Mazumder, Sanchita Roy in Lasers in Medical Science
    Article 20 April 2023
  17. A Prototype Software System for Intra-procedural Staff Dose Monitoring and Virtual Reality Training for Fluoroscopically Guided Interventional Procedures

    Staff dose management in fluoroscopically guided interventional procedures is a continuing problem. The scattered radiation display system (SDS),...

    Jonathan Troville, Stephen Rudin, Daniel R. Bednarek in Journal of Digital Imaging
    Article 24 February 2023
  18. Assessment of the E-value in the presence of bias amplification: a simulation study

    Background

    The E-value, a measure that has received recent attention in the comparative effectiveness literature, reports the minimum strength of...

    Eric Barrette, Lucas Higuera, Kael Wherry in BMC Medical Research Methodology
    Article Open access 28 March 2024
  19. Bayesian mendelian randomization with study heterogeneity and data partitioning for large studies

    Background

    Mendelian randomization (MR) is a useful approach to causal inference from observational studies when randomised controlled trials are not...

    Linyi Zou, Hui Guo, Carlo Berzuini in BMC Medical Research Methodology
    Article Open access 03 June 2022
  20. Cost-effectiveness of miglustat versus symptomatic therapy of Niemann–Pick disease type C

    Background

    Niemann–Pick disease type C (NP-C) is a progressive neurodegenerative disorder with early infantile (< 2 years), late infantile...

    Medo Gutić, Miloš N. Milosavljević, Slobodan M. Janković in International Journal of Clinical Pharmacy
    Article 15 October 2022
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