By Topic

An investigation of dual energy transmission measurements in simultaneous transmission emission imaging

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Welch, A. ; Med. Imaging Res. Lab., Utah Univ., Salt Lake City, UT, USA ; Gullberg, G.T. ; Christian, P.E. ; Jia Li
more authors

In this study we investigate the feasibility of acquiring dual energy transmission projection data using a conventional gamma camera. Transmission projection data are acquired, simultaneously with 99m Tc emission data, using the two major photopeaks of 153Gd, at 44 keV and 99 keV. The degree of contamination of the data in the 44 keV window, by scattered 99 keV transmission photons, is investigated using Monte Carlo simulations. A modified scaling method is proposed to convert the two attenuation maps, obtained from transmission data acquired at 44 keV and 99 keV, to one appropriate for 99mTc. This attenuation map is compared to one produced by scaling the 99 keV attenuation map, for the attenuation correction of 99mTc SPECT images. The use of dual energy transmission imaging is shown to improve the quantitative accuracy of the reconstructed SPECT images compared to a single scale factor method. However, for situations where a dual scaling factor method is possible, this is shown to perform as well as the dual energy method. Dual energy transmission imaging is shown to be more effective at visualizing areas of bone, particularly in regions near the edge of the untruncated field of view

Published in:

Nuclear Science, IEEE Transactions on  (Volume:42 ,  Issue: 6 )