Sökning: "local motion artifacts"

Hittade 2 uppsatser innehållade orden local motion artifacts.

  1. 1. Detection of local motion artifacts and image background in laser speckle contrast imaging

    Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknik

    Författare :Johannes Nyhlén; Märta Sund; [2023]
    Nyckelord :laser speckle contrast imaging; lsci; multi exposure laser speckle contrast imaging; melsci; machine learning; deep learning; statistical analysis; detection; local motion artifacts; 1D; 2D; 3D;

    Sammanfattning : Laser speckle contrast imaging (LSCI) and its extension, multi-exposure laser speckle contrast imaging (MELSCI) are non-invasive techniques to monitor peripheral blood perfusion. One of the main drawbacks of LSCI and MELSCI in clinical use is that the techniques are sensitive to tissue movement. LÄS MER

  3. 2. Effect of bladder volume changes and verification of CTV on CBCT for rectal cancer patients

    Master-uppsats, Lunds universitet/Medicinsk strålningsfysik, Lund; Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Lina Andersson; [2016]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Background and purpose: During radiotherapy, rectal cancer patients show inter-fractional internal motion that effects the delivered dose distribution. The purpose of this work is to study I) the inter-fractional bladder volume change, II) the effect of bladder volume change on bowel dose distribution, III) the effect of bladder optimization on the relationship between bladder volume and bowel dose and IV) the possibilities and difficulties of validating the clinical target volume (CTV) using a surrogate on cone-beam computed tomography (CBCT) scans. LÄS MER