Essays about: "collimator"

Showing result 36 - 38 of 38 essays containing the word collimator.

1. 36. 90Y-Scintigraphy of small animals A study of imaging parameters

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Melinda Joo; [2003]
   Keywords : Nukleärmedicin; Medicine and Health Sciences;

   Abstract : Yttrium-90 is a pure β-emitting radionuclide with a high energy (Emax = 2.28 MeV) and a short half-life (T½ = 64.1 h). It has shown to be a promising isotope to use in radio-immunotherapy. READ MORE

3. 37. A polymer gel prepared under normal levels of oxygen Basic studies and the potential for IMRT verifications

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Anna Karlsson; [2002]
   Keywords : MRI; Medicine and Health Sciences;

   Abstract : "The technology for planning and delivering radiotherapy has in the last decade undergone some revolutionary development and it is now possible to perform complex treatments such as stereotactic treatments and treatments using dynamic wedges, multileaf collimator and intensity modulation. The more precise limits surrounding the PTV have made it of utmost interest to be able to verify calculated dose distributions in 3D. READ MORE

4. 38. Off-axis primary-dose measurements using a mini-phantom

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Stefan Johnsson; [1996]
   Keywords : Strålterapi; Medicine and Health Sciences;

   Abstract : The characterization of the incident photon beam is usually divided into its dependence on collimator setting (head-scatter factor) and off-axis position (primary off-axis ratio). These parameters are normally measured "in air" with a build-up cap, thick enough to generate full dose build-up at the depth of dose maximum. READ MORE