Search for dissertations about: "image quality in ultrasound"

Showing result 1 - 5 of 22 swedish dissertations containing the words image quality in ultrasound.

2. 1. Toward increased applicability of ultrasound contrast agents

   Author : Malin Larsson; Lars-Åke Brodin; Anna Bjällmark; Kenneth Caidahl; Jan Engvall; KTH; []
   Keywords : 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;

   Abstract : 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. READ MORE

4. 2. Health economic evaluation for evidence-informed decisions in low-resource settings : the case of Antenatal care policy in Rwanda

   Author : Regis Hitimana; Anni-Maria Pulkki-Brännström; Lars Lindholm; Gunilla Kranz; Peter C. Smith; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Antenatal; maternal; cost; cost-effectiveness; ultrasound; EQ-5D-3L; Low-income countries; Public health; folkhälsa;

   Abstract : Introduction: The general aim of this thesis is to contribute to the use of health economic evidence for informed health care decisions in low-resource settings, using antenatal care (ANC) policy in Rwanda as a case study. Despite impressive and sustained progress over the last 15 years, Rwanda’s maternal mortality ratio is still among the highest in the world. READ MORE

5. 3. How does the technical status of medical ultrasound equipment affect image quality? Studies based on human observer experiments and a novel method for automatic detection of defective transducers

   Author : Robert Lorentsson; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ultrasound; defective transducer; image quality;

   Abstract : Ultrasound as an imaging modality has a fundamental role in modern healthcare. The equipment, especially transducers, is fragile and handled daily, and transducers are known to sometimes become defective. The overall aim of this thesis was to evaluate how the technical status of the equipment affects clinical image quality. READ MORE

6. 4. Lower limb venous incompetence and the effect of radiofrequency ablation versus open surgery : Focus on haemodynamics, quality of life and health economic aspects

   Author : Oskar Nelzén; Helene Zachrisson; Toste Länne; Johan Skoog; Gunnar Plate; Linköpings universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chronic venous incompetence; Varicose veins; Radiofrequency ablation; High ligation stripping Duplex ultrasound; Strain-gauge plethysmography; Quality of Life; Health economic evaluation;

   Abstract : Chronic venous incompetence (CVI) is a common condition, and varicose vein treatment is one of the most-common surgical procedures performed worldwide. Common symptoms of CVI are pain, cramps, itching, feeling of leg heaviness and venous claudication. Advanced CVI can lead to skin changes, eczema and venous ulcers. READ MORE

7. 5. Aspects of subaneurysmal aortas in a screening setting

   Author : Knut Thorbjørnsen; Anders Wanhainen; Sverker Svensjö; Khatereh Djavani Gidlund; Håkan Pärsson; Uppsala universitet; []
   Keywords : Abdominal aortic aneurysm; subaneurysmal aorta; screening; health related quality of life; health utility; quality adjusted life years; Kirurgi; Surgery;

   Abstract : With the introduction of screening programmes for abdominal aortic aneurysm (AAA) more individuals are being identified with a subaneurymal aorta (SAA; diameter 25-29mm). More recent data indicate that these aortas may not be as harmless as previously thought, but there is, however, no general agreement on how SAA should be managed. READ MORE