Sökning: "Contrast distribution"

Visar resultat 1 - 5 av 470 avhandlingar innehållade orden Contrast distribution.

  1. 1. Toward increased applicability of ultrasound contrast agents

    Författare :Malin Larsson; Lars-Åke Brodin; Anna Bjällmark; Kenneth Caidahl; Jan Engvall; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contrast agent; Contrast-to-tissue-ratio; Echocardiography; Endocardial border; Microbubbles; Multimodal; Phantom; Polymer; Ultrasound; Wall motion score index.; Teknik och hälsa; Technology and Health;

    Sammanfattning : Ultrasound is one of the most widely used modalities in medical imaging because of its high cost-effectiveness, wide availability in hospitals, generation of real-time images, and use of nonionizing radiation. However, the image quality can be insufficient in some patients. LÄS MER

  3. 2. Salient Region Detection Methods with Application to Traffic Sign Recognition from Street View Images

    Författare :Keren Fu; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; normalized cut; traffic sign recognition; saliency propagation; color distribution; continuous conditional random field; manifold; Salient region detection; adaptive graph edge weights; color contrast; geodesics;

    Sammanfattning : In the computer vision community, saliency detection refers to modeling the selective mechanism in human visual attentions. Outputs of saliency detection algorithms are called saliency maps, which represent conspicuousness levels of different scene areas. LÄS MER

  4. 3. Innovationsmiljöer i bronsålderns samhälle och idévärld : kring ny teknologi och begravningsritual i Västergötland

    Författare :Eva Weiler; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; megaliths; bronze; moulds; technology; innovation; communication; distribution; ideology; personified symbols; two-dimensional pictures; burial rites; Fornlämningar; Gravar; Bronsarbeten; Gravskick-- Sverige -- Västergötland; Sverige-- Västergötland -- Småland -- Skåne -- Halland;

    Sammanfattning : The aim of this thesis is to elucidate on the factors that lay behind general occurrences in society that diversely develop according to the variance in social and cultural backgrounds. The thesis encompasses the period between 2000-500 BC and concentrates on the effects of the introduction of a new technology (metal working) and new burial rites on the society in SW Sweden (Västergötland). LÄS MER

  5. 4. Cervical Radiculopathy: A Study With Selective Nerve Root Blocks

    Författare :Leif Anderberg; Neurokirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; orthopaedics; Contrast distribution; Nerve root block; Cervical radiculopathy; Kirurgi; traumatology; Treatment; ortopedi; traumatologi;

    Sammanfattning : Cervical radiculopathy is diagnosed by history, clinical examination of the patient and magnetic resonance imaging (MRI) of the cervical spine. In many of the patients undergoing this diagnostic strategy, the nerve root/roots responsible for the radicular pain is difficult to define as clinical examination and MRI investigation does not provide information enough. LÄS MER

  7. 5. On the possibility of limited weighing of lives

    Författare :Daniel Ramöller; Gustaf Arrhenius; Krister Bykvist; Hilary Greaves; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Aggregation; Axiology; Deontic Morality; Distribution; Ethics; Impartiality; Morality; Social Choice; Trade-offs; Values; Welfare; praktisk filosofi; Practical Philosophy;

    Sammanfattning : This thesis discusses the possibility of limited moral trade-offs between different people’s welfare. In chapter 2, I introduce the two central limited trade-off conditions. First, according to minimal infinite superiority, significantly benefiting one person matters more than slightly benefiting each of any number of better-off people. LÄS MER