Sökning: "medial axis"

Hittade 5 avhandlingar innehållade orden medial axis.

  1. 1. Towards Intelligent Deformable Models for Medical Image Analysis

    Författare :Ghassan Hamarneh; Chalmers University of Technology; []
    Nyckelord :shape modeling; deformable models; principal component analysis; echocardiography; snakes; active shape models; deformable spatio-temporal shape models; medial-based shape profiles; statistical shape variation; spatio-temporal shape analysis; magnetic resonance imaging; hierarchical regional principal component analysis; oral lesions; dynamic programming; segmentation; spring-mass model; shape deformation; optical flow; medical image analysis; artificial life; physics-based modeling; deformable organisms; digital color images; medial axis; active contour models;

    Sammanfattning : Medical imaging continues to permeate the practice of medicine, but automated yet accurate segmentation and labeling of anatomical structures continues to be a major obstacle to computerized medical image analysis (MIA). Deformable models, with its profound roots in estimation theory, optimization, and physics-based dynamical systems, represent a powerful approach to the general problem of medical image segmentation. LÄS MER

  2. 2. Studies of cytokine mediated regulation of central nervous functions : role of prostaglandins

    Författare :Monica Ek; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; interleukin-1; prostaglandin E2; central nervous system; HPA axis; fever; vagus nerve;

    Sammanfattning : The communication between the immune system and the central nervous system (CNS) results in an array of centrally regulated illness responses, including fever and increased hypothalamus-pituitary-adrenal (HPA) axis activity. The mechanisms by which the immune system signals the brain across the blood-brain barrier have not been completely elucidated, but proinflammatory cytokines, like interleukin-1 (IL-1), are believed to act as important mediators. LÄS MER

  3. 3. Structural properties of the mastoid using image analysis and visualization

    Författare :Olivier Cros; Michael Gaihede; Hans Knutsson; Bernard Ars; Linköpings universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : The mastoid, located in the temporal bone, houses an air cell system whose cells have a variation in size that can go far below current conventional clinical CT scanner resolution. Therefore, the mastoid air cell system is only partially represented in a CT scan. LÄS MER

  4. 4. Elbow kinematics : Studies of the elbow joint under normal conditions and after joint replacement

    Författare :Anne Ericson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP;

    Sammanfattning : Background: Total elbow arthroplasty (TEA) is used for treatment of patients with severe pain and disability due to reumatoid arthritis. Long term results are not as good as for hip and knee replacements. LÄS MER

  5. 5. Chemoattractants as causative agents, biomarkers and therapeutic targets in vascular pathology

    Författare :Yuri Sheikine; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; atherosclerosis; coronary artery disease; restenosis; chemokines; eicosanoids;

    Sammanfattning : Atherosclerosis and restenosis are driven by chronic immune response in the vascular wall. This involves cell migration into and within the vessel wall, cell proliferation as well as accumulation of lipids in the vessel wall. These processes are mediated, among other substances, by molecules belonging to a large family of chemoattractants. LÄS MER