Essays about: "Motion Correction"

Showing result 1 - 5 of 37 essays containing the words Motion Correction.

1. 1. Preprocessing for intravoxel incoherent motion analysis in the brain - Signal drift correction

   University essay from

   Author : Amina Warsame; [2023-04-17]
   Keywords : Medical physics; Diffusion magnetic resonance imaging; dMRI; Intravoxel incoherent motion; IVIM;

   Abstract : Diffusion magnetic resonance imaging (dMRI) is a diagnostic imaging technique that is sensitized to the movement of water molecules in tissues. Intravoxel incoherent motion (IVIM) analysis can be used to estimate blood flow in capillaries from weakly diffusion-weighted data. READ MORE

3. 2. Respiratory Motion Correction in PET Imaging: Comparative Analysis of External Device and Data-driven Gating Approaches

   University essay from KTH/Fysik

   Author : Nina Lindström Söraas; [2023]
   Keywords : PET CT; Tomographic reconstruction; Respiratory gating techniques; Image registration; Motion correction; PET CT; Tomografisk rekonstruktion; Gating tekniker; Bildregistrering; Rörelsekorrigering;

   Abstract : Positron Emission Tomography (PET) is pivotal in medical imaging but is prone to artifactsfrom physiological movements, notably respiration. These motion artifacts both degradeimage quality and compromise precise attenuation correction. READ MORE

4. 3. 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

5. 4. 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

6. 5. Characterization of Center-of-Mass and Rebinning in Positron Emission Tomography with Motion

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

   Author : Linder Hugo; [2021]
   Keywords : positron emission tomography; center of mass; motion correction;

   Abstract : Medical molecular imaging with positron emission tomography (PET) is sensitive to patient motion since PET scans last several minutes. Despite advancements in PET, such as improved photon-pair time-of-flight (TOF) difference resolution, motion deformations limit image resolution and quantification. READ MORE