Sökning: "square-law"

Hittade 4 uppsatser innehållade ordet square-law.

  1. 1. Evaluation of the DXA radiation environment at Sahlgrenska University Hospital

    Master-uppsats,

    Författare :Saga Söderholm; [2022-05-18]
    Nyckelord :Medical physics; DXA; DEXA; Dual-energy X-ray absorptiometry; Bone mineral density;

    Sammanfattning : Purpose: The aims of this work were to evaluate the radiation environment in the dual-energy X-ray absorptiometry (DXA) rooms at Sahlgrenska University Hospital, estimate personnel doses, determine legal requirements for DXA personnel, examine the operators’ view on radiation safety and develop material with dose information for patients and operators. Theory: DXA is a low dose X-ray modality mainly used in osteoporosis examinations, for which it is considered the reference technique. LÄS MER

  3. 2. Radiation exposure to personnel during CT procedures

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Henrik Berg; [2018]
    Nyckelord :CT; Scattered radiation; Cataract; Cancer; PCXMC; Dose;

    Sammanfattning : 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. LÄS MER

  4. 3. Gravitational Law in Extra Dimensions

    Kandidat-uppsats, KTH/Teoretisk fysik

    Författare :Michael Bühlmann; [2013]
    Nyckelord :;

    Sammanfattning : Some recent theories which try to amend shortcomings of current models in physics suggest the existence of additional dimensions. Such extra dimensions would modify the inverse square law of gravity. LÄS MER

  5. 4. Design, Implementation and Comparison of Demodulation Methods in AM and FM

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Gaojun Chen; Sen Lin; [2012]
    Nyckelord :Demodulation; Envelope; Coherent; Square-law; FM to AM; Zero-crossing; Quadrature.;

    Sammanfattning : Modulation and demodulation hold dominant positions in communication. Communication quality heavily relies on the performance of the detector. A simple and efficient detector can improve the communication quality and reduce the cost. LÄS MER