Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"beam modeling"”.
-
Characterization of Treatment Planning System Photon Beam Modeling Errors In Iroc Houston Phantom Irradiations
… purpose of this work was to investigate the TPS beam modeling developed by the radiotherapy community to understand where inconsistencies may arise, which variables are most susceptible to variations, and in what way changing these variables can alter dose calculations.</p> <p>Using the Imaging …
-
Microcomb fabrication for high accuracy foil x-ray telescope assembly and vector Gaussian beam modeling
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
-
Fundamental frequencies of I-joist, solid-sawn wood joist, and truss floors based on tee-beam modeling
… and their frequencies were measured. Double tee-beam floors were built and also cut from the full size floors and their frequencies were measured. The floor joists investigated included: solid sawn, parallel chord floor trusses, and composite I -joists. The first natural frequency of each …
-
Consistency of Advanced Radiation Therapy QA Methods and Global Auditing Systems
… the magnitude of perturbation associated with beam modeling, calibration, and delivery errors that are currently common in clinical practice. Further, a workflow that facilitates agreement amongst the pass/fail results for audit quality assurance centers is proposed.</p> <p>Through a …
-
Modeling of weak scatterers in a transducer beam
… and specificity to disease conditions. A modeling approach that accounts for transducer beam diffraction effects, predicts the response from a three-dimensional spatial map of acoustic properties that is several wavelengths in size containing features that are on the order of the size of a …