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Full-Text Articles in Biomedical Engineering and Bioengineering
Bme Stats Fall 2003, Department Of Biomedical Engineering, Florida International University
Bme Stats Fall 2003, Department Of Biomedical Engineering, Florida International University
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A Computational Method For Internal Radiation Dosimetry At The Voxel Level, Swapna Chigurupati
A Computational Method For Internal Radiation Dosimetry At The Voxel Level, Swapna Chigurupati
FIU Electronic Theses and Dissertations
The current development of hybrid SPECT/CT and PET/CT systems allows not only accurate attenuation correction of images, but also provide an anatomical frame for the 3D spatial representation of the dose distribution. The main goal of this thesis project was to develop computational algorithms for calculation of the 3D dose distribution delivered by internal emitters based on the images and information provided by new hybrid SPECT/CT and PET/CT systems. Although many experimental problems exist in patient-specific dosimetry, current drawback is the lack of radionuclide voxel S values for the set of all possible combinations of cubical and non-cubical pixel edges …
Accuracy Of Activity Quantitation Of F-18 Fluorodeoxyglucose (Fdg) Positron Emission Tomography (Pet) Imaging Using Simulated Malignant Tumors, Madhu Durai
FIU Electronic Theses and Dissertations
This thesis involves a procedure, which calculated and compared the sum of all the pixel counts, threshold pixel counts sum of a 3D PET image and mean and maximum pixel count of one single transaxial slice (2D) of simulated tumors for a chosen region of interest (ROI). A calibration factor was multiplied by the sum of the pixel counts, threshold pixel counts sum of all the transaxial slices, and the mean, and maximum pixel counts of one single transaxial slice in an ROI to calculate for the activity of the tumor. This activity calculated was compared with the real activity …
A Dosimetry And Radiobiological Model For Intravascular Brachytherapy Treatment Planning With Radioisotope Emitting Stents, Maria Alejandra Caceres
A Dosimetry And Radiobiological Model For Intravascular Brachytherapy Treatment Planning With Radioisotope Emitting Stents, Maria Alejandra Caceres
FIU Electronic Theses and Dissertations
The aim of this study was to develop a practical, versatile and fast dosimetry and radiobiological model for calculation of the 3D dose distribution and radiobiological effectiveness of radioactive stents. The algorithm was written in Matlab 6.5 programming language and is based on the dose point kernel convolution. The dosimetry and radiobiological model was applied for evaluation of the 3D dose distribution of 32P, 90Y, 188Re and 177Lu stents. Of the four, 32P delivers the highest dose, while 90Y, 188Re and 177Lu require high levels of activity to deliver a significant therapeutic …
Static And Dynamic Mechanical Testing Of A Polymer With Potential Use As Heart Valve Material, Andres Felipe Aguirre
Static And Dynamic Mechanical Testing Of A Polymer With Potential Use As Heart Valve Material, Andres Felipe Aguirre
FIU Electronic Theses and Dissertations
Synthetic tri-leaflet heart valves generally fail in the long-term use (more than 10 years). Tearing and calcification of the leaflets usually cause failure of these valves as a consequence of high tensile and bending stresses borne on the material. The primary purpose of this study was to explore the possibilities of a new polymer composite to be used as synthetic tri-leaflet heart valve material. This composite was comprised of polystyrene-polyisobutylene-polystyrene (Quatromer), a proprietary polymer, embedded with continuous polypropylene (PP) fibers. Quatromer had been found to be less likely to degrade in vivo than polyurethane. Moreover, it was postulated that a …