Search for dissertations about: "Brain mapping"

Showing result 11 - 15 of 114 swedish dissertations containing the words Brain mapping.

2. 11. Nuclear magnetic resonance and microcirculation: The influence of pulsatile brain-tissue motion on measurements of intravoxel incoherent motion and assessment of haemodynamics using exo- and endogenous tracers

   Author : Ronnie Wirestam; Lund Medicinsk strålningsfysik; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; diagnostic radiology; cortical activation; diffusion; tumor; tumour; ischemic stroke; ischaemic stroke; tracer kinetics; bolus tracking; phase mapping; brain motion; intracranial dynamics; blood flow; haemodynamics; vascularity; MRS; perfusion; MRI; magnetic resonance; Clinical physics; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

   Abstract : In this project, the potential of magnetic resonance (MR) imaging and spectroscopy in studies of microcirculation and haemodynamics was evaluated. The spatial and temporal characteristics of human pulsatile brain-tissue movements in healthy individuals, relevant for the understanding of the cerebrospinal-fluid (CSF) circulation and the pathogenesis of hydrocephalus, were thoroughly investigated. READ MORE

4. 12. Functional mapping of somatosensory cortices in the human brain

   Author : Anna S K Bodegård; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Sornatosensory areas; PET; cytoarchitectonic mapping; postcentral gyrus; shape perception; active touch; passive touch;

   Abstract : Tactile perception is a remarkable ability that enables us to recognise objects and handle tools. Cortical processing during tactile and shape perception in humans is not fully understood. READ MORE

5. 13. Development and Application of Software Tools for Mass Spectrometry Imaging

   Author : Patrik Källback; Per E. Andrén; Per Svenningsson; Anna Nilsson; Benjamin Bowen; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mass spectrometry imaging; MALDI; DESI; msIQuant; quantitation; neurotransmitters; drugs; derivatization; brain; compression; data entropy reduction;

   Abstract : Mass spectrometry imaging (MSI) has been extensively used to produce qualitative maps of distributions of proteins, peptides, lipids, neurotransmitters, small molecule pharmaceuticals and their metabolites directly in biological tissue sections. Moreover, during the last 10 years, there has been growing demand to quantify target compounds in tissue sections of various organs. READ MORE

6. 14. Signal Processing for Spectroscopic Applications

   Author : Erik Gudmundson; Peter Stoica; Peter Händel; Stoica Stoica; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spectral estimation; spectroscopic techniques; MRI; NMR; NQR; signal detection; parameter estimation; missing data; non-uniform sampling; damped sinusoids; detection of explosives; T1-mapping; relaxometry; brain imaging; skin imaging; blood velocity estimation; medical ultrasound; Signal processing; Signalbehandling; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Abstract : Spectroscopic techniques allow for studies of materials and organisms on the atomic and molecular level. Examples of such techniques are nuclear magnetic resonance (NMR) spectroscopy—one of the principal techniques to obtain physical, chemical, electronic and structural information about molecules—and magnetic resonance imaging (MRI)—an important medical imaging technique for, e. READ MORE

7. 15. Imaging brain functions during neuropsychological testing

   Author : Per Hamid Ghatan; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Keywords: Positron Emission Tomography; Cognition; Alcohol; Nicotine; Brain injury; Interference;

   Abstract : This thesis has dealt with the development of tools for assessing cognitive functions(attention and working memory) using functional imaging and the evaluation of the modulatory effects of performance, nicotine, alcohol, brain injury and auditory interference. Two cognitive tasks commonly used in the assessment of patients with brain injury, the externally-generated Perceptual Maze Test (PMT) and an internally-generated arithmetical task, Serial-7, were used as activation paradigms. READ MORE