Essays about: "q-space"

Found 3 essays containing the word q-space.

1. 1. Optimal Q-Space Sampling Scheme : Using Gaussian Process Regression and Mutual Information

   University essay from Uppsala universitet/Avdelningen för systemteknik

   Author : Ture Hassler; Jonathan Berntsson; [2022]
   Keywords : AI; Machine learning; Gaussian process; Gaussian process regression; MRI; dMRI; q-space; sampling; statistics; information theory; mutual information; entropy; pytorch; gpytorch;

   Abstract : Diffusion spectrum imaging is a type of diffusion magnetic resonance imaging, capable of capturing very complex tissue structures, but requiring a very large amount of samples in q-space and therefore time.  The purpose of this project was to create and evaluate a new sampling scheme in q-space for diffusion MRI, trying to recreate the ensemble averaged propagator (EAP) with fewer samples without significant loss of quality. READ MORE

3. 2. Using q-space Diffusion MRI for Structural Studies of a Biological Phantom at a 3T Clinical Scanner

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Anna Ryhög; [2007]
   Keywords : MRI; Medicine and Health Sciences;

   Abstract : "Diffusion magnetic resonance imaging (MRI) is today a well-established method in clinics around the world. For example it is a leading method or diagnosing ischaemic stroke at an early stage. Trough research it is a continuously growing field applicable to many different tasks. READ MORE

4. 3. Diffusion q-space measurements in-vivo does sequence timing influence the result?

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Emil Nordh; [2007]
   Keywords : MRI; Medicine and Health Sciences;

   Abstract : Magnetic resonance imaging (MRI) is still a fast growing area of research and is an important part of the clinical tools used for diagnosis of various diseases. The diagnostic values of diffusion imaging are well known especially for ischemic stroke in the acute phase. READ MORE