Sökning: "Diagnostic Imaging methods"

Visar resultat 16 - 20 av 216 avhandlingar innehållade orden Diagnostic Imaging methods.

1. 16. CT colonography. Technique, diagnostic accuracy and patient acceptance

   Författare :Maria H Svensson (Reutersköld); Göteborgs universitet; []
   Nyckelord :Colon; Rectum; Computed tomography; Three-dimensional imaging; Colorectal neoplasms; Colonic polyps; Colonoscopy; Acceptance testing; Incidental findings; Diagnostic accuracy;

   Sammanfattning : The aim was to evaluate diagnostic potential, technical performance, and patient acceptance of CT colonography when used for detection of colorectal polyps and cancer in symptomatic patients with a high risk of colorectal neoplasia.Methods: After bowel preparation, 111 symptomatic patients underwent CT colonography followed by conventional colonoscopy. LÄS MER

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

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

   Sammanfattning : 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. LÄS MER

4. 18. Statistical methods in medical image estimation and sparse signal recovery

   Författare :Fekadu Lemessa Bayisa; Jun Yu; Ottmar Cronie; Henning Omre; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Computed tomography; magnetic resonance imaging; Gaussian mixture model; skew-Gaussian mixture model; hidden Markov random field; hidden Markov model; supervised statistical learning; synthetic CT images; pseudo-CT images; spike and slab prior; adaptive algorithm;

   Sammanfattning : This thesis presents work on methods for the estimation of computed tomography (CT) images from magnetic resonance (MR) images for a number of diagnostic and therapeutic workflows. The study also demonstrates sparse signal recovery method, which is an intermediate method for magnetic resonance image reconstruction. LÄS MER

5. 19. Pulmonary embolism : validation of diagnostic imaging methods in the clinical setting

   Författare :Tage Nilsson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Computed tomography; lung scintigraphy; pulmonary arteriography; pulmonary embolism; D-dimer;

   Sammanfattning : Pulmonary embolism (PE) is an elusive diagnosis and none of the existing imaging modalities have a 100% diagnostic specificity or sensitivity. Pulmonary arteriography (PA) is the most specific test although the improvement of computed tomography technique has made this a commonly used method. Lung scintigraphy often gives ambiguous results. LÄS MER

7. 20. Nuclear medicine methods in idiopathic Parkinsonism : pre- and postsynaptic dopamine SPECT

   Författare :Susanna Jakobson Mo; Katrine Åhlström Riklund; Anne Larsson Strömvall; Lars Forsgren; Rimma Axelsson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nuclear medicine; SPECT; 123I-FP-Cit; 123I-IBZM; dopamine; parkinsonism; Parkinson’s disease; multiple system atrophy; progressive supranuclear palsy; Radiology; radiologi;

   Sammanfattning : Background: Single photon emission computed tomography (SPECT) with dopamine transporter (DAT) and dopamine D2 receptor (D2R) ligands can visualise the integrity of the nigrostriatal dopamine system. Parkinson’s disease (PD) and the atypical parkinsonian diseases (APD), progressive supranuclear palsy (PSP) and multiple system atrophy (MSA), have similar symptoms and dopamine depletion, but differ in pharmacological response and prognosis. LÄS MER