By Topic

Optimisation of noise equivalent count rates for brain and body FDG imaging using gamma camera PET

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

3 Author(s)
D. Visvikis ; Inst. of Nucl. Med., Univ. Coll. Med. Sch., London, UK ; T. Fryer ; S. Downey

Describes the use of Noise Equivalent Count rates to optimise the clinical use of a modified dual headed gamma camera for positron emission tomography. Phantoms were used to simulate the distribution and uptake for brain and body 18F-fluorodeoxyglucose imaging, including the presence of activity outside the imaging field of view. Camera count rates were recorded as a function of activity in the field of view in the presence and absence of lead septa. The use of variable number and width of energy windows was also investigated. Results indicate that acquisitions without axial collimators is optimal for brain imaging while a restriction of 12° in the axial acceptance angle leads to superior NEC rates for torso imaging. The most significant factor affecting the NEC rates for body imaging with no axial collimation is the detection of random coincidences from out of field activity. Under most imaging conditions the use of a Compton-photopeak energy window in addition to the traditional photopeak-photopeak appears to lead to increased NEC rates, although an accurate scatter correction would be necessary to compensate for the associated increase in the scatter fraction

Published in:

Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE  (Volume:3 )

Date of Conference: