Sökning: "contrast enhancement"

Visar resultat 36 - 40 av 119 avhandlingar innehållade orden contrast enhancement.

1. 36. Dynamic glucose enhanced chemical exchange saturation transfer MRI : Optimization of methodology and characterization of cerebral transport kinetics

   Författare :Anina Seidemo; Lund Medicinsk strålningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemical exchange saturation transfer CEST ; Dynamic glucose enhanced DGE MRI; GlucoCEST; MRI; D-glucose; Fysicumarkivet A:2023:Seidemo;

   Sammanfattning : Dynamic glucose enhanced (DGE) chemical exchange saturation transfer (CEST) MRI is an emerging imaging technique that provides a molecular-specific type of image contrast, based on magnetic labelling of exchangeable protons. The technique enables the use of biodegradable sugars as contrast agents, and such compounds are believed to have less side effects than conventional MRI contrast agents. LÄS MER

3. 37. Chemically Synthesized Nano-Structured Materials for Biomedical and Photonic Applications

   Författare :Fei Ye; Mamounm Muhammed; Joydeep Dutta; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Nanostructured materials have attracted a broad interest for applications in scientific and engineering fields due to their extraordinary properties stemming from the nanoscale dimensions. This dissertation presents the development of nanomaterials used for different applications, namely biomedicine and dye lasing. LÄS MER

4. 38. Investigation of Bladder Tumors with CT Urography in Patients Presenting with Gross Hematuria

   Författare :Malin Helenius; Anders Magnusson; Torbjörn Andersson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; CT Urography; Bladder tumor; Gross hematuria; Tissue charactarization; Bladder distension; Tumor detection; Radiology; Radiologi;

   Sammanfattning : Bladder tumor is the most common tumor detected in patients presenting with gross hematuria. Early detection and treatment is crucial for good prognosis, however, delay in diagnosis and treatment is common. Routine work-up of gross hematuria includes cystoscopy and Computed Tomography Urography (CTU). LÄS MER

5. 39. Dynamic magnetic resonance imaging of the breast : imaging features for diagnosis and prognosis of breast cancer

   Författare :Botond K Szabo; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Breast neoplasm; magnetic resonance imaging; prognostic factors; survival analysis; image segmentation; artificial neural networks;

   Sammanfattning : The general aim of the present thesis was to identify and study dynamic contrast-enhanced magnetic resonance imaging (CE-MRI) features that contribute to the diagnosis and may help in predicting prognosis in breast cancer. Study I studied the kinetic and morphological MR features and their diagnostic power were studied in a total of 92 women with 109 histopathologically verified breast lesions. LÄS MER

7. 40. Synthesis of Polymeric Nanocomposites for Drug Delivery and Bioimaging

   Författare :Heba Asem; Joydeep Dutta; Moustapha Hassan; Fei Ye; Jöns Hilborn; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biodegradable polymers; SPION; QDs; drug delivery; cytotoxicity; MRI; in vivo fluorescence imaging; biodistribution; Fysik; Physics;

   Sammanfattning : Nanomaterials have gained great attention for biomedical applications due to their extraordinary physico-chemical and biological properties. The current dissertation presents the design and development of multifunctional nanoparticles for molecular imaging and controlled drug delivery applications which include biodegradable polymeric nanoparticles, superparamagnetic iron oxide nanoparticles (SPION)/polymeric nanocomposite for magnetic resonance imaging (MRI) and drug delivery, manganese-doped zinc sulfide (Mn:ZnS) quantum dots (QDs)/ SPION/ polymeric nanocomposites for fluorescence imaging, MRI and drug delivery. LÄS MER