Essays about: "cone-beam"

Showing result 31 - 33 of 33 essays containing the word cone-beam.

1. 31. Evaluation of Geometric Accuracy and Image Quality of an On-Board Imager (OBI)

   University essay from Medicinsk strålningsfysik (tills m KI)

   Author : Milos Djordjevic; [2007]
   Keywords : Image-guided radiotherapy; Cone-beam CT; OBI; Quality Assurance;

   Abstract : In this project several tests were performed to evaluate the performance of an On-Board Imager® (OBI) mounted on a clinical linear accelerator. The measurements were divided into three parts; geometric accuracy, image registration and couch shift accuracy, and image quality. READ MORE

3. 32. Experimental Radionuclide Therapy Quantitative Pinhole planar and SPECT imaging, aiming for dosimetry based on biokinetic modeling and small animal S-values

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Fredrik Henricsson; [2005]
   Keywords : Nukleärmedicin; Medicine and Health Sciences;

   Abstract : New radionuclide therapies in humans should be preceded by experimental animal therapies, in order to evaluate the efficacy of the new therapy regime. These experimental studies have to be performed with a reliable and accurate quantification system, with properties that have been evaluated and where possible flaws have been corrected for. READ MORE

4. 33. Iterative Enhancement of Non-Exact Reconstruction in Cone Beam CT

   University essay from Bildbehandling; Tekniska högskolan

   Author : Johan Sunnegårdh; [2004]
   Keywords : Technology; iterative enhancement; cone beam CT; non-exact reconstruction; PI-original; interpolation; image representation; forward projection; TEKNIKVETENSKAP;

   Abstract : Contemporary algorithms employed for reconstruction of 3D volumes from helical cone beam projections are so called non-exact algorithms. This means that the reconstructed volumes will contain artifacts irrespective of the detector resolution and number of projections angles employed in the process. READ MORE