By Topic

Development of an emission-transmission CT system combining X-ray CT and SPECT

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
$31 $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

7 Author(s)
Blankespoor, S.C. ; California Univ., San Francisco, CA, USA ; Hasegawa, B.H. ; Brown, J.K. ; Heanue, J.A.
more authors

We describe the design and initial evaluation of a prototype emission-transmission imaging system which incorporates a third-generation X-ray CT scanner and a single-headed SPECT scanner. The two commercial imaging devices are juxtaposed such that the CT table can move the patient directly into the SPECT scanner prior to the X-ray scan. The integrated system is being used to investigate correlation of X-ray CT images with conventional SPECT images and to attempt correction of attenuation errors in the SPECT image. We have evaluated two potential sources of error in the acquisition and analysis of data from this system. First, the observed flux of scattered X-rays passing through the SPECT collimator into the gamma camera is 17,000 cps-well below the rated maximum of 180,000 cps. Second, attenuation correction of SPECT will be performed by generating an attenuation map from the CT image. Previous experience suggests that directly calculated values can be generated within 3% of actual attenuation values, but more complex approaches will be implemented if necessary. Preliminary results of applying CT-derived attenuation correction are presented for a myocardial perfusion phantom

Published in:

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record  (Volume:4 )

Date of Conference:

30 Oct-5 Nov 1994