Avancerad sökning

Visar resultat 1 - 5 av 22 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Core Biopsy of Breast and Axillary Lesions : Technical and Clinical Aspects

   Författare :Shahin Abdsaleh; PG Lindgren; Per Skaane; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Automatic core needle biopsy; Semiautomatic core needle biopsy; Surgical specimen; Dynamic needle behavior; Hormone Receptors; Radiologisk forskning; Radiological research; Radiologisk forskning;

   Sammanfattning : The aims of this work were to image and analyze the needle behavior at automated core biopsy, to investigate the clinical utility of an alternative core biopsy technique using a semiautomated gun in breast and axillary lesions, and also to compare core biopsy with surgical specimens in malignant breast lesions regarding histologic features and hormone receptor expression.In two experimental studies, using butter and silicon phantoms, respectively, the needle pass was imaged and its dynamic behavior studied. LÄS MER

3. 2. MRI Diagnosis of Intracranial Hemorrhage : Experimental and Clinical Studies

   Författare :Montserrat Alemany Ripoll; Kaj Ericsson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; hemorrhage; experimental; MRI; T2*-w GE sequence; old microhemorrhages; stroke; Radiologisk forskning; Radiological research; Radiologisk forskning; radiologi; Radiology;

   Sammanfattning : The purpose of this work was to improve the diagnosis of intracranial hemorrhage with MRI, using, among others, T2*-w GE sequences. Various sequences were tested in rabbits at two magnetic field strengths. Then, the most effective technique was applied to stroke patients. LÄS MER

4. 3. Alternative Methods for Assessment of Split Renal Function

   Författare :Henrik Björkman; Anders Magnusson; Jonas Wadström; Torbjörn Andersson; Uppsala universitet; []
   Nyckelord :Radiology; Split renal function; Live kidney donor; CT; Renography; Dynamic MRI; Renal volume; Respiratory triggering; Radiologisk forskning;

   Sammanfattning : Living kidney donation is a clinical situation with unique features in the sense that healthy individuals voluntarily expose themselves to certain risks and inconveniences. Therefore, eliminating as much of the associated discomfort as possible is crucial. LÄS MER

5. 4. Degradation, Metabolism and Relaxation Properties of Iron Oxide Particles for Magnetic Resonance Imaging

   Författare :Karen Briley Saebo; Håkan Ahlström; Atle Bjørnerud; Michael Knopp; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Magnetic Resonance Imaging; contrast agents; iron oxide particles; metabolism; relaxation mechanisms; Radiologisk forskning; Radiological research; Radiologisk forskning;

   Sammanfattning : Whereas the effect of size and coating material on the pharmacokinetics and biodistribution of iron oxide based contrast agents are well documented, the effect of these parameters on liver metabolism has never been investigated. The primary purpose of this work was to evaluate the effect of iron oxide particle size and coating on the rate of liver clearance and particle degradation using a rat model. LÄS MER

7. 5. Myocardial Scars on MRI : Their Prevalence and Possible Impact

   Författare :Charlotte Ebeling Barbier; Håkan Ahlström; Tomas Bjerner; Lars Johansson; Lars Lind; Kirsi Lauerma; Uppsala universitet; []
   Nyckelord :Radiology; magnetic resonance imaging; myocardial infarction; epidemiology; myocardial infarction; epidemiology; Radiologisk forskning;

   Sammanfattning : Myocardial infarction (MI) causes high morbidity and mortality worldwide and for effective prevention and treatment MIs have to be adequately detected.The existence of clinically unrecognized MIs (UMIs) has been known for the past hundred years, but an ultimate tool for their detection has not yet been found. LÄS MER