A CT Scanner Using Coincidence Techniques

Thumbnail Image
Date
2014-05-19
Authors
Finch, Victoria
Journal Title
Journal ISSN
Volume Title
Publisher
Houghton College
Abstract
A CT scanner has been designed which uses gamma rays produced by positron annihilation. A low-activity 22Na source produces the positrons, which, when they annihilate, create 0.511 MeV gamma rays travelling in opposite directions. These gamma rays can be used to image an object using NaI detectors that are collinear with the source. Requiring a coincidence between the detectors reduces background. LabVIEW software counted the number of gamma ray coincidences and translated and rotated a robotic table, allowing the attenuation to be measured along multiple beam paths through the object. Ultimately, the attenuation data can be used to reconstruct an image of the object being observed.
Description
Event
Keywords
Student Projects
Collections
Rights
Authors retain the copyright for all content posted in this repository. This material may not be published, reproduced, broadcast, rewritten, or redistributed beyond the Houghton College community without permission except in accordance with fair use doctrine.