Sökning: "receiver operating characteristics ROC"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden receiver operating characteristics ROC.

  1. 1. Evaluation of image quality and diagnostic accuracy in breast tomosynthesis. Comparison with digital mammography and estimates of radiation risk

    Författare :Tony Svahn; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; diagnostic accuracy; breast tomosynthesis BT ; digital mammography DM ; average glandular dose AGD ; receiver operating characteristics ROC ; risk assessment; search-model SM ; proper ROC PROPROC ;

    Sammanfattning : Recent advances in the digital detector technology have paved the way for modalities such as two-dimensional digital mammography (DM) and three-dimensional breast tomosynthesis (BT). In this work, experimental studies were conducted to investigate the influence of reducing the average glandular dose (AGD) on detection of simulated lesions in DM and to compare the diagnostic accuracy of BT and DM. LÄS MER

  3. 2. Quantifying the quality of medical x-ray images. An evaluation based on normal anatomy for lumbar spine and chest radiography

    Författare :Anders Tingberg; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Clinical physics; normal anatomy; free response forced error FFE ; receiver operating characteristics ROC ; visual grading analysis VGA ; European image criteria; quantifying clinical image quality; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Sammanfattning : Optimisation in diagnostic radiology requires accurate methods for determination of patient absorbed dose and clinical image quality. Simple methods for evaluation of clinical image quality are at present scarce and this project aims at developing such methods. LÄS MER

  4. 3. Prior Knowledge and Recognition Memory : a Computational Modeling Approach

    Författare :Johan Hellman; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Recognition memory; Episodic memory; Pre-experimental familiarity; Event-Related Potentials; Item variability; Receiver-Operating Characteristics; Computational Models;

    Sammanfattning : For more than a century, an immense interest has been devoted to the study of recognition memory, where a multitude of memory phenomena has been explained. Recognition memory is usually described with parsimonious measurement and statistical models, stemming from dual process theory and signal detection theory. LÄS MER

  5. 4. Mental illness and criminal behavior : individual characteristics related to criminal conduct among violent offenders with schizophrenia

    Författare :Anders Tengström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Criminality; Forensic psychiatry; HCR-20; Psychopathy; PCL; Risk assessment; Schizophrenia; Substance abuse; Violent crime; VRAG;

    Sammanfattning : During the last decades, interest has increased in structured risk assessment of future violence as well as in research addressing the link between schizophrenia and violence. The overall aim of this study was to extend our knowledge concerning risk assessment and the connection between schizophrenia and criminal behavior. LÄS MER

  7. 5. Personality disorder and violent criminality : a follow-up study with special reference to psychopathy and risk assessment

    Författare :Martin Grann; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Forensic psychiatry; forensic psychology; personality disorders; psychopathy; PCL-R; HCR-20; VRAG; risk assessment; receiver operating characteristic analysis; neural network;

    Sammanfattning : Background: Structured models for the assessment of psychopathy and risk of violent recidivism have gained currency in forensic and correctional practice in many countries. The overall aim of this study was to test the predictive validity of some of these models among violent offenders with personality disorders in Sweden. LÄS MER