Search for dissertations about: "Observer variation"

Showing result 1 - 5 of 30 swedish dissertations containing the words Observer variation.

  1. 1. Ultrasound measurement of cervical length in the second trimester of pregnancy for prediction of preterm delivery

    Author : Pihla Kuusela; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; preterm delivery; transvaginal ultrasound; cervical length measurement; second trimester; prospective study; observational study; mass screening; reproducibility of results; inter-observer variation; intra-observer variation; data accuracy; quality control;

    Abstract : Abstract Background: Short cervical length is a risk factor for preterm delivery (PTD) and screening of cervical length using transvaginal ultrasound in the second trimester is a proposed method to find women at risk Aims: To examine the potential value of routine measurement of cervical length in a Swedish population of women with singleton pregnancies in the prediction of PTD. To estimate inter- and intra-observer agreement and reliability of cervical length measurements. READ MORE

  2. 2. Optimization of paediatric CT examinations - An approach to minimize absorbed dose to patients with regard to image quality and observer variability

    Author : Kerstin Ledenius; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : Computed Tomography; Paediatrics; Radiation Dosage; Computer Simulations; Nonparametric Statistics; Observer Variation; Radiographic Image Enhancement;

    Abstract : The absorbed dose to paediatric patients is important bearing in mind the increased risk of radiation-induced cancer due to exposure to X-rays at young ages. Questions have also been raised of whether a CT examination of the paediatric brain might lead to a reduction in cognitive function. READ MORE

  3. 3. Radiographic follow-up analysis of Br?nemark? dental implants

    Author : Solweig Sundén Pikner; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cluster effect; Dental implants; Dependency; Diagnostic accuracy; Long-term follow-up; Marginal bone level; Observer variation; Osseointegration; Prediction;

    Abstract : Radiography plays an important role in clinical routine practice and in research projects evaluating dental implants, among them Br?nemark? System. Presence of a peri-implant radiolucency has been used in studies as a criterion for implant failure without knowledge of its diagnostic accuracy. READ MORE

  4. 4. Degenerative changes of the human temporomandibular joint : A radiological, microscopical, histomorphometrical and biochemical study

    Author : Lennart Flygare; Göran Isacsson; Lunds universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Synovial Fluid; Temporomandibular Joint Diseases; Proteoglycans; Osteoarthritis; Observer variation; Microscopy; Bone density; Diagnostic properties; Image processing; Tomography; X-ray; Odontology; stomatology; Odontologi; Temporomandibular Joint Diseases;

    Abstract : In five autopsy specimen studies human temporomandibular joints were investigated by conventional tomography, macroscopy, and microscopy for degenerative changes, in particular erosive hard-tissue changes.In the microscopical evaluation special attention was paid to the calcified cartilage. READ MORE

  5. 5. Imaging of hip trauma - occult, suspect and concomitant fractures

    Author : David Collin; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hip fractures; Occult; Pelvic; Radiography; Computed tomography; Magnetic resonance imaging; Observer variation;

    Abstract : Background: Between one and nine percent of all hip fractures are occult or suspect and further examinations with computed tomography (CT) and/or magnetic resonance imaging (MRI) are vital for further handling. Statistically robust conclusions have not been previously reported. READ MORE