Sökning: "Phantoms"

Visar resultat 1 - 5 av 87 avhandlingar innehållade ordet Phantoms.

  1. 1. Advances in quantitative emission tomography : development and analysis of methods for validation and correction

    Författare :Cathrine Jonsson; Magnus Dahlbom; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SPECT; Quantification; rCBF; Scatter correction; Phantoms; medicinsk strålningsfysik; Medical Radiation Physics;

    Sammanfattning : The nuclear medicine imaging techniques SPECT and PET are sensitive tools in mapping various physiological and biochemical processes in vivo. This work was devoted to investigations of methodological and physical properties of the SPECT technique as well as developing methods for validation and correction. LÄS MER

  3. 2. Phantoms of a Future Past : A Study of Contemporary Russian Anti-Utopian Novels

    Författare :Mattias Ågren; Anna Ljunggren; Per-Arne Bodin; Tetsuo Mochizuki; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Russian literature; utopia; anti-utopia; dystopia; metanarrative; satire; parody; Tatyana Tolstaya; Viktor Pelevin; Vladimir Sorokin. Russia; Russian Federation; slaviska språk; Slavic Languages;

    Sammanfattning : The aim of this dissertation is to study the evolution of the Russian anti-utopian literary genre in the new post-Soviet environment in the wake of the defunct Soviet socialist utopia. The genre has gained a renewed importance during the 2000s, and has been used variously as a means of dealing satirically with the Soviet past, of understanding the present, and of pondering possible courses into the future for the Russian Federation. LÄS MER

  4. 3. Conventional spiral and low-dose computed mandibular tomography for dental implant planning

    Författare :Annika Ekestubbe; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Artifacts; Dental Implantation; Endosseous; methods; Dental Implants; Humans; Jaw; Edentulous; radiography; Mandible; radiography; Patient Care Planning; Phantoms; Imaging; Radiation Dosage; Radiography; Dental; methods; Reproducibility of Results; Tomography; X-Ray; instrumentation; methods; Tomography; X-Ray Computed; methods;

    Sammanfattning : Absorbed doses to radiosensitive organs in the head and neck from pre-implant conventional hypocycloidal, conventional spiral and computed tomography (CT) were measured with thermoluminescent dosimeters in an anthropomorphic phantom head. From conventional tomography organ doses, except to the major salivary glands, were below 0.2 mGy. LÄS MER

  5. 4. From Monte Carlo PET Simulations to Reconstructed Images : Modelling and Optimisation for 68Ga Theragnostics

    Författare :Philip Kalaitzidis; Lund Medicinsk strålningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Anthropomorphic phantoms; Monte Carlo modelling; Nuclear medicine; PET; SPECT; Theragnostics; Tomographic reconstruction; Fysicumarkivet A:2023 Kalaitzidis;

    Sammanfattning : In nuclear medicine, radiopharmaceuticals can be administered for both diagnostic and therapeutic purposes. In recent years, there has been an increasing interest in theragnostics, a strategy that combines both diagnosis and therapy. LÄS MER

  7. 5. Cross-modal Imaging in Lung Research: From µCT dosimetry to synchrotron phase contrast microtomography biomechanical insights in preclinical lung injury models

    Författare :Richard Deyhle Jr; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Thermoluminescent Dosimetry; Optically stimulated luminescence OSL ; Computed tomography CT ; 4DCT; Phantoms; Imaging; X-rays; pre-clinical models; Pre-clinical; dosimetry: physical basis; biomedical strain; lung injury; mechanical ventilation; inflammation; lung function; synchrotron; histology; acute respiratory distress syndrome ARDS ; Ventilator Inudced Lung Injury VILI ; Histology; Forced Oscillation Technique FOT ; Divergence Theorem; Registration techniques;

    Sammanfattning : Lung diseases continue to present a large burden to public health, especially in industrialized countries. For abetter understanding of the underlying patho-mechanisms in lung related diseases as well as for testing theefficacy of novel therapies, preclinical studies in animal models are indispensable. LÄS MER