Sökning: "Substitute CT"
Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Substitute CT.
1. Spatial Mixture Models with Applications in Medical Imaging and Spatial Point Processes
Sammanfattning : Finite mixture models have proven to be a great tool for both modeling non-standard probability distributions and for classification problems (using the latent variable interpretation). In this thesis we are building spatial models by incorporating spatially dependent categorical latent random fields in a hierarchical manner similar to that of finite mixture models. LÄS MER
2. Effects of antiresorptive agents on inflammation and bone regeneration in different osseous sites - experimental and clinical studies
Sammanfattning : The biological mechanisms involved in bone regeneration in osteoporotic bone and the effect of antiresorptive drugs in relation to surgically inserted biomaterials are not fully understood. Improved osseointegration of titanium implants but also adverse effects of antiresorptive therapies, such as osteonecrotic jaw have been described in the literature. LÄS MER
3. On flexible random field models for spatial statistics: Spatial mixture models and deformed SPDE models
Sammanfattning : Spatial random fields are one of the key concepts in statistical analysis of spatial data. The random field explains the spatial dependency and serves the purpose of regularizing interpolation of measured values or to act as an explanatory model. LÄS MER
4. Magnetic resonance imaging with ultrashort echo time as a substitute for X-ray computed tomography
Sammanfattning : Radiotherapy dose calculations have evolved from simple factor based methods performed with pen and paper, into computationally intensive simulations based on Monte Carlo theory and energy deposition kernel convolution.Similarly, in the field of positron emission tomography (PET), attenuation correction, which was originally omitted entirely, is now a crucial component of any PET reconstruction algorithm. LÄS MER
5. Computerized tools : a substitute or a supplement when diagnosing Alzheimer's disease?
Sammanfattning : Alzheimer’s disease (AD) is the most common form of dementia in the elderly characterized by difficulties in memory, disturbances in language, changes in behavior, and impairments in daily life activities. By the time cognitive impairment manifests, substantial synaptic and neuronal degeneration has already occurred. LÄS MER