Essays about: "registration motion"

Showing result 1 - 5 of 22 essays containing the words registration motion.

  1. 1. Spatiotemporal PET reconstruction with Learned Registration

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Pierre Meyrat; [2022]
    Keywords : PET; Tomographic reconstruction; Deep Learning; MLEM; PET; Tomografisk rekonstruktion; Deep Learning; MLEM;

    Abstract : Because of the long acquisition time of Positron Emission Tomography scanners, the reconstructed images are blurred by motion. We hereby propose a novel motion-correction maximum-likelihood expectation-maximization algorithm integrating 3D movements between the different gates estimated by a neural network trained on synthetic data with contrast invariance. READ MORE

  2. 2. Quantification and Detection of Motion Artifacts in Laser Speckle Contrast Imaging

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

    Author : Dennis Amphan; [2022]
    Keywords : Laser speckle contrast imaging; Image registration; Motion artifacts; Detection;

    Abstract : Laser speckle contrast imaging (LSCI) is a non-invasive method for assessment of microcirculatory blood flow. The technique is based on analysis of speckle patterns to build 2D maps of perfusion with high spatial and temporal resolution. READ MORE

  3. 3. A comparison between Actigraph-GT9X Link and Actiwatch 2, by analyzing different sleep variables

    University essay from Uppsala universitet/Institutionen för kvinnors och barns hälsa

    Author : Hanna Wallin; [2022]
    Keywords : Sleep registration; Movement registration; Activity monitor; Sleep diary; Free-living environment;

    Abstract : Sleep is very important for health and academic performance. The amount of sleep is variable and depends among other things, on the age of the individual. Today there are many varieties of motion sensors that can be used in healthcare and clinical research for sleep registration, such as Actigraph GT9X Link and Actiwatch 2. READ MORE

  4. 4. Deformable image registration using anatomical landmarks in tubular structures

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Jenny Wingqvist; [2021]
    Keywords : Medical image analysis; radiation therapy; deformable image registration; anatomical landmarks; bronchial tree; vascular tree;

    Abstract : Cancer is one of the leading causes of death in the world, but advances in research and development of treatment methods is constantly ongoing to reduce the number of deaths and the amount of suffering. One of many approaches is radiation therapy, which uses high doses of radiation to kill tumors. READ MORE

  5. 5. Automatic magnetic resonance brain volume measurements to assess the effect of minimised blood sample extraction on brain development in extremely preterm infants

    University essay from Lunds universitet/Läkarutbildningen

    Author : Hickmat Hamie; [2021]
    Keywords : Magnetic resonance imaging; Brain development; Prematurity; Medicine and Health Sciences;

    Abstract : Aim: To evaluate a pipeline for automatic MRI brain segmentation and volumetric tissue structure quantification in a cohort of extremely preterm infants. Methods: 13 extremely preterm neonates underwent MRI-scanning at a term equivalent age. Seven of these subjects had suitable MRI sequences and were analyzed in the pipeline. READ MORE