The stringent demands for accuracy in radiosurgery impinge on all aspects of the radiosurgical procedure. A computer program, used to determine target coordinates from planar stereotactic image pairs, has been developed. Digital subtraction angiography images, obtained with a localizer attachment affixed to the stereotactic frame, are analyzed with the program for the localization of certain malformations. During treatment set-up verification, the center of the radiation distribution is determined using portal linear accelerator images of the collimated radiosurgery beam, with the patient in the final treatment position and without removal of the radiosurgical collimator. A custom portal localizer attachment has been developed in-house for this purpose. Localization results obtained with a test phantom show a maximum deviation of 0.4 mm from the known target locations. The program has also been shown to be effective in detecting a misalignment between a localized target and the treatment radiation center during set-up verification.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.61344 |
| Date | January 1992 |
| Creators | Cadman, Patrick F. (Patrick Frank) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Medical Radiation Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001306613, proquestno: AAIMM80372, Theses scanned by UMI/ProQuest. |
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