Sökning: "Radioactive Image"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden Radioactive Image.

  1. 1. Investigation of Ion Extraction Anomalies at TwinEBIS

    Master-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Niek van Woudenberg; [2023]
    Nyckelord :CERN; ISOLDE; Ion Source; EBIS; REXEBIS; TwinEBIS; Ion losses; Charge Breeding; Ion Extraction; CST Studio Suite; Physics and Astronomy;

    Sammanfattning : The electron beam ion source REXEBIS at CERN-ISOLDE delivers highly-charged ra- dioactive ions for post-acceleration in the HIE-ISOLDE LINAC. Research and develop- ment of components for electron beam ion sources is carried out at the TwinEBIS test stand, currently equipped with a Brillouin electron gun called MEDeGUN. LÄS MER

  3. 2. Evaluation of whole-body bone scans performed using a gamma camera with Cadmium Zinc Telluride detector

    Master-uppsats,

    Författare :Victor Asp; [2022-01-13]
    Nyckelord :Medical physics; whole-body bone scans; gamma camera; Cadmium Zinc Telluride detector;

    Sammanfattning : The bone scan is a common nuclear medicine imaging procedure that is mainly used for evaluating several oncological patient groups. A radioactive tracer, 99mTc -labelled diphosphonate, is injected intravenously and accumulates in the skeleton. The distribution of the tracer in the body is measured with a gamma camera 3 hours post-injection. LÄS MER

  4. 3. A Study on Fault Tolerance of Image Sensor-based Object Detection in Indoor Navigation

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yang Wang; [2022]
    Nyckelord :Gazebo; YOLO; Object detection; Fault tolerance; Fault Injection; Network pruning; Gazebo; YOLO; Objektdetektering; Feltolerans; Felinjektion; Nätverk beskärning;

    Sammanfattning : With the fast development of embedded deep-learning computing systems, applications powered by deep learning are moving from the cloud to the edge. When deploying NN onto the devices under complex environments, there are various types of possible faults: soft errors caused by cosmic radiation and radioactive impurities, voltage instability, aging, temperature variations, etc. LÄS MER

  5. 4. A Phantom Based Comparison of Image Segmentation Algorithms for Adaptive Functional Volume Determination of the Thyroid Gland using SPECT

    Uppsats för yrkesexamina på avancerad nivå, Stockholms universitet/Fysikum

    Författare :Henrik Berg; [2021]
    Nyckelord :Hyperthyroidism; Nuclear Medicine; SPECT; Functional Volume; Phantom Study; Adaptive Image Segmentation; Thresholding; Region Growing;

    Sammanfattning : Background One of the most used treatments for hyperthyroidism, is therapy with radioactive iodine (131I), which is accumulated in the thyroid gland. To determine the activity of 131I to be administered for a certain absorbed dose, the volume of the gland is of great importance but the historically used methods for estimating the functional volume of the gland are based on large approximations. LÄS MER

  7. 5. Visualizing the Invisible: An Exploration of the Radioactive Image within the Chernobyl Exclusion Zone

    Master-uppsats, Lunds universitet/Avdelningen för konsthistoria och visuella studier

    Författare :Fannie Frederikke Baden; [2020]
    Nyckelord :Radioactive Image; Nuclear Disaster; Nuclear power; Chernobyl; Disaster Tourism; Visual tropes; radioactivity; semiotics; visualized natural phenomena; Cultural Sciences;

    Sammanfattning : This thesis explores the radioactive image and poses the multi-layered question: ‘(how) can radioactivity exist as an image, when it cannot be seen, heard or felt?’. By having no sensorial qualities, radioactivity is often narrated in popular media by metaphoric association. LÄS MER