Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"observer agreement"”.
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Perspectives on the management of humerus fractures due to gunshot trauma: an inter- and intra-observer agreement and reliability study
… on gunshots of the humerus were available. Interobserver agreement studies reported low levels of intra- and inter-rater reliability (IRR) for the classification of proximal humerus fractures using Neer and AO/OTA classification. The complexity of the fractures, the inconsistency of …
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Observer variation in detecting lymphadenopathy on chest radiography
Objective. To assess inter- and intra-observer agreement in the detection of lymphadcnopathy on chest radiography in children at risk for tuberculosis. Methods Dianostic test. Chest radiography using antero-posterior and lateral films. Observers. Four paediatric pulmonologists independently viewing …
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Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis
… overlap considerably and there is a wide inter-observer agreement in the detection of lymphadenopathy, considered the hallmark of PTB. Small pliable paediatric airways are easily compressed by enlarged lymph nodes. Unlike lymph nodes, however, the lucent airways contrast against the surrounding …
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The eye of the beholder: a meta-analytic examination of the convergence between leader and observer perceptions of leadership
… behaviors are similar to or different from observers' perceptions. Importantly, we investigate whether leader-observer agreement is influenced by type of observer and type of leadership. First, we meta-analyzed the relationship (i.e., correlation) between leader- and observer-ratings along …
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A feasibility study for the reporting of cervical large loop excisions of the transformation zone (LLETZ) biopsies by consultant biomedical scientists in the UK
… study. Results - There was overall good inter-observer agreement for both the three tier and two tier system of grading squamous lesions plus good agreement for glandular and invasive carcinomas identified by the Consultant BMS. There was variable inter-observer agreement for the completeness …
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Cone Beam Computed Tomography - radiation dose and image quality assessments
… of which 41 were endodontically treated. Three observers assessed the images by consensus. The result showed that CBCT imaging was superior with a higher number of teeth diagnosed with periapical lesions (42 vs 32 teeth). When evaluating 3D Accuitomo examinations in the posterior mandible in 30 …
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Analysis and Modification of Unprogrammed Reinforcement Contingencies in a Hospital for the Developmentally Disabled
… data with data obtained by trained independent observers. Following baseline observations, six hospital attendants were instructed to record their delivery of positive consequences to residents. If an attendant's rate of delivery of positive consequences increased during this self-monitoring …
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Human scalp hair: geometry, biochemistry, growth parameters and mechanical characteristics
… and Fluorescent Light Microscopy). Inter-observer agreement was poor for 8-groups (k=0.418) but improved for 6-groups (k=0.671). The intra-observer agreement also improved [ranges: k=0.444 to 0.648 (8-groups) and k=0.599 to 0.836 (6-groups)]. The yield strength of all hair groups was …
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A Phantom Study for Attenuation Change and Detection of Calcification in Lung Nodules According to Variation of Examination Techniques in Low Dose CT
… standard-dose and low-dose CT scans. Inter-observer agreement for grading of hyperdense nodule showed better agreement in higher radiation-dose scans. Conclusion : Low-dose CT maintains the diagnostic accuracy in visual assessment of hyperdense lung nodule despite increased image noise and …
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Effect of assessing glaucomatous optic disc changes using automated alternation flicker comparisons of serial optic disc stereophotographs
… RESULTS: There was slight but significant agreement between automated alternation flicker and GPA criteria of SAP(κ=0.284, p=0.007). However, agreement between traditional OCT and SAP was poor. 15 eyes were detected as progression using GPA criteria of SAP and OCT which showed significant …
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The Columnar Lined Esophagus: aspects on the assessment of dysplasia and on the relationship with the esophageal submucosal glands
… subjective and suffers from considerable inter-observer variation among pathologists. In study I, we devised and tested two clinically applicable methods for immunohistochemical assessment of p53 and Ki67 as surrogate dysplasia markers. Using these methods, the inter-observer agreement improved …
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Evaluating The Impact Of Voxel Size On AI-Based Segmentation Accuracy For Pulp Chamber And Root Canal Detection: An In Vitro Study
… demonstrated high reliability and good agreement with reference CBCT measurements for canal length, with a mean absolute difference of approximately 0.5 mm. Segmentation performance was significantly influenced by both voxel size and tooth type. Reduced accuracy and consistent …
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Leveraging Modelling and Machine Learning for the Analysis of Curvilinear Structures in Medical Images
… assessment, with limited repeatability and inter-observer agreement.<br/><br/>In this thesis I have endeavoured to address these problems by proposing a fully automated framework for image-level tortuosity estimation, consisting of a hybrid segmentation method and a versatile tortuosity estimation …
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The influence of diagnostic information format on orthodontic treatment planning : a feasibility study
… of this feasibility study were to assess intra-observer reproducibility of treatment plans when developed from clinical examination, hard copy records and digital records. Inter-observer reproducibility of treatment plans was also assessed when using hard copy and digital records.<br/>The aim …
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Optimization of image quality and radiation dose in neuroradiological computed tomography
… in brain CT. In both studies, considerable inter-observer variation was seen. In Paper II a discrepancy was seen between results of objective and subjective evaluation of image quality and also between grading and ranking, indicating observer bias. Statistical IR improved image quality in …
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Comparison of echocardiography and computed tomography for characterization of cardiac clots in cats with heart disease
… correlation coefficient (ICC) showed moderate agreement for both (0.58 for continuous, 0.64 dynamic). Smaller clots, or ones with incomplete filling of the left auricle, were more likely missed by reviewers on CTA. Echocardiography had low specificity (67%) and poor inter-observer agreement …
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The Effects of Video Self-Modeling on Functional Life Skills in Adolescents with Autism Spectrum Disorder
… graph. Reliability was assessed through Inter-observer Agreement (IOA). Procedural integrity was verified for procedures implemented in phases of the study. Results from visual analyses from the study suggest VSM is an effective teaching method for adolescents with ASD in a home setting. …
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Towards naturalistic developmental behavioural interventions for autism in Africa: nature and context of caregiver-child interactions in low-resource South African environments
… Results For caregiver-child interactions, observer agreement for 12 of 16 items was reasonable, with weighted kappas (within 1 scale point) of 0.66-1, an estimated accuracy of 88-99%, and percentage agreements of 75-100% for all items. Ratings for items across Parts I and II of the JERI …
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The Soft Tissues in Osteoarthritis and Arthroplasty of the Hip
… of examinations. It was shown that intra/ inter observer agreement increased with increasing number of examinations. The pain in osteoarthritis (OA) and its relation to the elastic properties of the hip joint capsule was analyzed. In OA patients intracapsular pressure and capsular elasticity, …
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Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers
… features combined with variable inter-observer assessment s contribute to diagnostic uncertainty. The CXR would be of most value when used specifically to evaluate those features of childhood TB that it shows best and where expert observers agree, namely those signs indicating …
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