Sökning: "artifact reduction"
Visar resultat 11 - 15 av 17 avhandlingar innehållade orden artifact reduction.
11. Analysis of Acrylamide and Anthocyanins in Foods : Extraction Optimization for Challenging Analytes
Sammanfattning : In this thesis, the main concern has been to improve the reliability of different parts of the analytical workflow (Paper I, II, IV &V). Additionally, one of the resulting optimized methods was used in a real application (Paper III). Paper I-II concerned the extraction of acrylamide (AA) from foods. LÄS MER
12. Capturing the breath of the heart by magnetic resonance imaging : five-dimensional cardio-respiratory resolved cine imaging during free breathing
Sammanfattning : Cardiac imaging with cardiovascular magnetic resonance has the advantage of enabling dynamic visualizations, several quantifiable measures, and good soft-tissue contrast. However, a major drawback is the need for breath holding during many acquisitions to limit motion artifacts. LÄS MER
13. Iterative Filtered Backprojection Methods for Helical Cone-Beam CT
Sammanfattning : State-of-the-art reconstruction algorithms for medical helical cone-beam Computed Tomography (CT) are of type non-exact Filtered Backprojection (FBP). They are attractive because of their simplicity and low computational cost, but they produce sub-optimal images with respect to artifacts, resolution, and noise. LÄS MER
14. Industrialization of Services : Technology and Routinization in the 21st Century
Sammanfattning : Sweden has a long tradition of process improvements, productivity increments, waste reduction in manufacturing, continuing a mode of industrialization that helped achieve prosperity. With growing urban centers, mechanization of agriculture, outsourcings by manufacturing and the public sector with subsequent acquisitions, large service firms have appeared in an ever-growing service sector. LÄS MER
15. Multidimensional MRI of Myocardial Dynamics : Acquisition, Reconstruction and Visualization
Sammanfattning : Methods for measuring deformation and motion of the human heart in-vivo are crucial in the assessment of cardiac function. Applications ranging from basic physiological research, through early detection of disease to follow-up studies, all rely on the quality of the measurements of heart dynamics. LÄS MER