Sökning: "artifact reduction"
Visar resultat 1 - 5 av 17 avhandlingar innehållade orden artifact reduction.
1. Movement artifact reduction in laser Doppler blood flowmetry : myocardial perfusion applications
Sammanfattning : Laser Doppler perfusion monitoring (LDPM) and imaging (LDPI) enable assessment of tissue microvascular perfusion. The techniques are based on the Doppler broadening of the optical spectrum occurring when coherent laser light is scattered by moving red blood cells (RBC). LÄS MER
2. Contributions to Signal Processing for MRI
Sammanfattning : Magnetic Resonance Imaging (MRI) is an important diagnostic tool for imaging soft tissue without the use of ionizing radiation. Moreover, through advanced signal processing, MRI can provide more than just anatomical information, such as estimates of tissue-specific physical properties. LÄS MER
3. Reduction of metal artifacts in MR imaging of patients with total hip arthroplasty
Sammanfattning : Aims of the studies: To apply and compare MR imaging metal artifact reducing sequences (MARS) including subtraction imaging after contrast application in patients with metal-on-metal (MoM) hip prostheses, investigate the prevalence and characteristics of periprosthetic abnormalities, as well as their relation with pain and risk factors. [Paper I]. LÄS MER
4. Creating opportunity by connecting the unconnected : mobile phone based agriculture market information service for farmers in Bangladesh
Sammanfattning : This thesis is framed within the research area of Information and Communication Technologies for Development (ICT4D), which is concerned with how ICT can make a difference to the lives of the poor. This study focuses primarily on mobile phones and how they can be used as part of an Agriculture Market Information Service (AMIS) in order to provide crucial information to farmers in Bangladesh. LÄS MER
5. Metal artifacts in computed tomography : impact of reduction methods on image quality and radiotherapy treatment planning
Sammanfattning : Degradation of image quality by metal artifacts is a common problem in computed tomography (CT) imaging, which can limit the diagnostic value of a CT examination and also introduce inaccuracies in radiotherapy (RT) treatment planning. In recent years, commercial metal artifact reduction (MAR) methods have been launched by several CT vendors. LÄS MER