Sökning: "Three-dimensional"

Visar resultat 1 - 5 av 1091 avhandlingar innehållade ordet Three-dimensional.

  1. 1. Positron Emission Tomography with Three-Dimensional Reconstruction

    Detta är en avhandling från Radiation Physics, Lund

    Författare :Kjell Erlandsson; [1996]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiology; Clinical physics; quantitation; reconstruction; three-dimensional; tomography; positron; emission; 3D; PET; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Sammanfattning : In this thesis, the developments of two different low-cost scanners for positron emission tomography (PET) based on 3D acquisition, are presented. 3D reconstruction methods for these systems are also presented. LÄS MER

  2. 2. Three Dimensional Determinations of Inclusions in Ferroalloys and Steel Samples

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Yanyan Bi; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Three dimensional; Ferroalloy; Inclusion; Spinel inclusion; T hermodynamic calculation; REM clusters; Formation mechanism; Statistical analysis; Maximum size;

    Sammanfattning : As the requirements on material properties increase, there has been a demand on an additional knowledge on the effect of impurities in the ferroalloyson the steel cleanness. Thus, the number, morphology, size and composition of inclusions in sixdifferent ferroalloys (FeTi, FeNb, FeSi,SiMn, LC and HC FeCr) were investigatedin this study. LÄS MER

  3. 3. Movement strategies and dynamic knee control after anterior cruciate ligament injury a three-dimensional biomechanical analysis

    Detta är en avhandling från Umeå University

    Författare :Jonas L. Markström; Umeå universitet.; [2019]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Anterior cruciate ligament; biomechanics; kinematics; kinetics; finite helical axis; injury prevention; sports; reliability; agreement; one-leg hops; functional data analysis; physiotherapy; fysioterapi;

    Sammanfattning : Background: Rupture of the anterior cruciate ligament (ACL) is common and mainly occurs in non-contact situations in sports, often due to momentarily poor movement control. Assessment of movement quality during sport-like tasks iscrucial to understand how to decrease the high risk of reinjury for ACL-injured persons, but also how to prevent primary injury. LÄS MER

  4. 4. Three-dimensional structured carbon foam synthesis and applications

    Detta är en avhandling från Umeå : Umeå University

    Författare :Ngoc Tung Pham; Umeå universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon foam; melamine foam; absorbent; water purification; heterogeneous catalyst; catalyst support; SpinChem®; rotating bed reactor; water electrolysis; energy conversion;

    Sammanfattning : Recently, due to the unique properties and structures such as large geometric surface area, electrical conductivity and light weight, 3D structured carbon materials have been attracting extensive attention from scientists. Moreover, the materials, which can provide well-defined pathways for reactants to easily access active sites, are extremely useful for energy conversion as well as environmental and catalysis applications. LÄS MER

  5. 5. Three-dimensional ultrasound studies of normal and abnormal ovaries

    Detta är en avhandling från Department of Clinical Sciences, Lund University

    Författare :Ligita Jokubkiene; Lunds universitet.; Lund University.; [2012]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ovary; ovarian follicle; ovarian neoplasms; ultrasonography; three-dimensional imaging; Doppler ultrasound imaging; vascular morphology;

    Sammanfattning : Popular Abstract in Swedish Äggstockarna genomgår förändringar under en normal menstruationscykel. I samband med tumörväxt i äggstockarna utvecklas nya blodkärl. Dessa förändringar kan upptäckas med både tvådimensionellt (2D) och tredimensionellt (3D) gråskale- och Doppler-ultraljud. LÄS MER