Sökning: "Digital radiography"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden Digital radiography.

  1. 1. Studies on the use of digital radiography for the assessment of periapical bone lesions

    Författare :Boel Kullendorff; Helsingborg Kliniska Vetenskaper; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; subtraction radiography; image processing; Digital radiography; dental radiography; Odontology; stomatology; Odontologi;

    Sammanfattning : The aim was to study digital radiography and to evaluate the influence of image processing on digital dental radiographs for the assessment of periapical lesions. In four studies, artificial bone lesions were made periapically and interradicularly in the mandibular premolar and molar regions. LÄS MER

  3. 2. Orthopaedic measurements with computed radiography. Methodological development, accuracy, and radiation dose with special reference to the weight-bearing lower extremity and the dislocating patella

    Författare :Jan Sanfridsson; Lund Ortopedi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Clinical physics; digital.; computer-assisted; Picture Archiving and Communication Systems; computed radiography; radiography; effective dose; radiation dosage; measurements; biomechanics; dislocating patella; musculoskeletal; patellofemoral joint; Knee joint; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Sammanfattning : The overall aim of this study was to develop and evaluate a measurement system for computed radiography (CR) and Picture Archiving and Communication Systems (PACS), permitting measurements of long distances and angles in and between related images. The developed measurement system, which was based on the QUESTOR Precision Radiography (QPR) system, was applied to the weight-bearing knee with special reference to the dislocating patella. LÄS MER

  4. 3. Quality Aspects of Digital Radiography in General Dental Practice

    Författare :Kristina Hellén-Halme; Malmö högskola; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Digital radiography;

    Sammanfattning : POPULÄRVETENSKAPLIG SAMMANFATTNINGDet övergripande syftet med denna avhandling var att klargöra hur digital röntgenteknik används hos allmäntandläkaren och framför allt har syftet varit att undersöka kvaliteten hos röntgenbilderna och hur den skulle kunna förbättras. I det första arbetet studerades digitala röntgenbilder som var inskickade i samband med förhandsprövningar till Försäkringskassan. LÄS MER

  5. 4. Physical and psychophysical properties of digital intraoral radiography

    Författare :Harry Charalabos Stamatakis; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Objectives: This thesis aimed to the evaluation of different digital intraoral radiographic systems, partly by defining objective measures of their physical properties, namely their resolution, signal and noise characteristics, and partly by employing methods to measure their psychophysical properties including viewer performance, such as the Perceptibility Curve test. In a next step, a mathematical model was developed to predict Perceptibility Curves without employing viewers. LÄS MER

  7. 5. Scaphoid fractures : Studies on diagnosis and treatment

    Författare :Bertil Vinnars; Bengt Gerdin; Lars Adolfsson; Uppsala universitet; []
    Nyckelord :Surgery; Scaphoid Bone; Wrist Joint; Wrist Injuries; Fracture Healing; Cost of Illness; Health Care Costs; Outcome Assessment Health Care ; Arthroplasty; Radiography; Health status; Kirurgi;

    Sammanfattning : Scaphoid fracture is most common in young individuals of working age. Without adequate diagnosis and treatment, long-term results are poor. Operative treatment is being recommended increasingly often instead of a long time in cast, although there is no evidence-based support for its superiority. LÄS MER