Essays about: "Ionizing radiation"

Showing result 26 - 30 of 61 essays containing the words Ionizing radiation.

  1. 26. Radiation protection measurements in clinical practice - Dosimetry with NaCl pellets

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Petter Wilke; [2019]
    Keywords : Physics and Astronomy;

    Abstract : Within the field of medical radiation protection, radiation safety and personal dosimetry, there is a constant pursuit for improving existing methods and evaluating new approaches for measuring and quantifying the radiation doses that hospital staff may be exposed to in their clinical work. There are numerous ways of determining what doses the staff are being exposed to and the most commonly used is based on thermoluminescent dosemeters (TLD) with e. READ MORE

  3. 27. Effects of acetylation and deacetylation inhibitors on DNA double strand breaks repair and cell survival

    University essay from Uppsala universitet/Institutionen för immunologi, genetik och patologi

    Author : Eugenia Kalliontzi; [2018]
    Keywords : ;

    Abstract : During treatment with ionizing radiation (IR), cells are killed mainly due to ionizing radiation caused acute damage to DNA, such as double-strand breaks, where opposite DNA strands in close proximity are cut. To counteract toxicity of double-strand breaks, cells have evolved DNA damage repair systems such as homologous recombination and non-homologous end joining. READ MORE

  4. 28. Dosimetry of ionizing radiation with an artificial neural network : With an unsorted, sequential input

    University essay from Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Author : Ivan Appelsved; [2018]
    Keywords : Artificial neural network; recurent neural network; ionizing radiation; dosimetry; timepix3 radiation camera;

    Abstract : In this thesis the verification of a neural network’s proficiency at labeling ionizing radiation particles from the unsorted output of a timepix3 camera is attempted. Focus is put on labeling single particles in separate data sequences with slightly preprocessed input data. READ MORE

  5. 29. Radiation exposure to personnel during CT procedures

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Henrik Berg; [2018]
    Keywords : CT; Scattered radiation; Cataract; Cancer; PCXMC; Dose;

    Abstract : During X-ray examinations a large part of the radiation is scattered from the patient, contributing to larger radiation doses to medical staff operating inside the examination room. Ionizing radiation contributes to the risk of developing cancer and hereditary diseases but also to the risk of developing cataract. READ MORE

  6. 30. Representation Learning on Brain MR Images for Tumor Segmentation

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Kiu Wai Lau; [2018]
    Keywords : MRI; brain tumor; representation learning; segmentation; autoencoder; unified representation;

    Abstract : MRI is favorable for brain imaging due to its excellent soft tissue contrast and absence of harmful ionizing radiation. Many have proposed supervised multimodal neural networks for automatic brain tumor segmentation and showed promising results. However, they rely on large amounts of labeled data to generalize well. READ MORE