Sökning: "CNR"
Visar resultat 1 - 5 av 24 uppsatser innehållade ordet CNR.
1. Development of Advanced X-ray Micro-Tomography Helical Scan andTomographic Data Processing
Master-uppsats, Högskolan i Gävle/Avdelningen för elektroteknik, matematik och naturvetenskapSammanfattning : Micro-computed tomography (Micro-CT) is an imaging technique that allows for high-resolution,three-dimensional (3D) internal visualization of small objects in a non-destructive manner. However,a significant limitation arises when attempting to image elongated samples at higher resolutions andmagnifications due to the inherently small field of view (FOV). LÄS MER
2. 3D printer in dosimetry and mammography – designing and testing an OSL dosemeter holder and a low contrast-detail phantom
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : Introduction: Today, 3D printing is a versatile tool used in a wide range of fields. With the advent of more cost-effective fused deposition modelling (FDM) 3D printing technologies it is time to investi- gate what such a 3D printer has to offer in radiation science applications. LÄS MER
3. En bildkvalitésutvärdering av två datortomografer i syfte att rättfärdiga ett inköp av en ny datortomograf : En fantomstudie
Kandidat-uppsats, KTH/Medicinteknik och hälsosystemSammanfattning : Antal datortomografiundersökningar har ökat under flera år i Sverige tack vare tekniska utvecklingar och ökad tillgänglighet på sjukvård. Södertälje sjukhus röntgenavdelningen är i behov av att byta ut en utdaterad datortomograf (eng: Computed tomography, CT) och avdelningen för medicinsk teknik har föreslagit ett inköp av en CT med fotonräknande-detektor. LÄS MER
4. Implementation and verification of a quantitative MRI method for creating and evaluating synthetic MR images
Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)Sammanfattning : The purpose of this thesis was to implement and quantitatively test a quantitative MRI (qMRI) method, from which synthetic MR images are created and also evaluated. The parameter maps of T1, T2*, and effective proton density (PD*) were tested with reference tubes containing different relaxation times, and concentrations of water (H2O) and heavy water (D2O). LÄS MER
5. Liver contrast-enhancement on Computed tomography : a question of to be or not to be in the right phase
Master-uppsats, Uppsala universitet/Institutionen för kirurgiska vetenskaperSammanfattning : Background: Computed tomography (CT), is commonly used imaging technique in cancer patients. In CT performed for tumour staging to detect the spread of tumours, the liver is a common place for metastases. LÄS MER