NDLI: PET Performance of the GEMINI TF: A Time-of-flight PET/CT Scanner

Content Provider	IEEE Xplore Digital Library
Author	Muzic, R.F. Kolthammer, J.A.
Copyright Year	2006
Description	Author affiliation: Dept. of Radiol., Cleveland Univ. Hosp., OH (Muzic, R.F.)
Abstract	We present a summary of the performance of a new-generation of commercial PET/CT scanners with time-of-flight (TOF) capability. The Philips GEMINI TF uses 28,336 lutetium-yttrium oxyorthosilicate detector elements, 4 times 4 times 22 $mm^{3},$ arranged in 28 modules that define a 90 cm diameter "cylinder". Our evaluation was done in terms of NEMA NU 2-2001 methodology supplemented by additional phantom scans designed to assess the capability of a fast, TOF scanner. Transverse resolution was 4.8 and 5.2 mm FWHM and axial resolution was 4.4 and 5.3 mm at 1 and 10 cm, respectively. The sensitivity was 7.25 and 7.56 cps/kBq at center and at 10 cm. Peak noise-equivalent count rate was 110 kcps obtained at 17.4 kBq/mL. Hot-sphere contrast recovery was 31.4, 49.7, 60.3, and 68.9% for 10, 13, 17 and 22 mm spheres at a 4 to 1 concentration ratio. Cold-sphere contrast recovery was 68.1 and 72.3% for 28 and 37 mm spheres. These contrast recoveries were independent of incremental translations in the axial direction. Overall, the scanner demonstrated high spatial resolution, sensitivity, and count rate performance. This translates into good visual quality for brain imaging as demonstrated using clinical and phantom images.
Starting Page	1940
Ending Page	1944
File Size	391720
Page Count	5
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.354274
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positron emission tomography Computed tomography Imaging phantoms Detectors Image reconstruction Biomedical measurements Spatial resolution Brain Protocols Measurement standards
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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