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European Journal of Nuclear Medicine and Molecular Imaging
Published in: European Journal of Nuclear Medicine and Molecular Imaging 4/2011

01-04-2011 | Original Article

Performance characterization of the Inveon preclinical small-animal PET/SPECT/CT system for multimodality imaging

Authors: Keiichi Magota, Naoki Kubo, Yuji Kuge, Ken-ichi Nishijima, Songji Zhao, Nagara Tamaki

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 4/2011

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Abstract

Purpose

We investigated the performance of the Inveon small-animal PET/SPECT/CT system and compared the imaging capabilities of the SPECT and PET components.

Methods

For SPECT, the energy resolution, tomographic spatial resolution and system sensitivity were evaluated with a 99mTc solution using a single pinhole collimator. For PET, the spatial resolution, absolute sensitivity, scatter fraction and peak noise equivalent count were evaluated. Phantoms and a normal rat were scanned to compare the imaging capabilities of SPECT and PET.

Results

The SPECT spatial resolution was 0.84 mm full-width at half-maximum (FWHM) at a radius of rotation of 25 mm using a 0.5-mm pinhole aperture collimator, while the PET spatial resolution was 1.63 mm FWHM at the centre. The SPECT system sensitivity at a radius of rotation of 25 mm was 35.3 cps/MBq (4 × 10−3%) using the 0.5-mm pinhole aperture, while the PET absolute sensitivity was 3.2% for 350–650 keV and 3.432 ns. Accordingly, the volume sensitivity of PET was three orders of magnitude higher than that of SPECT.

Conclusion

This integrated PET/SPECT/CT system showed high performance with excellent spatial resolution for SPECT and sensitivity for PET. Based on the tracer availability and system performance, SPECT and PET have complementary roles in multimodality small-animal imaging.
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Metadata
Title
Performance characterization of the Inveon preclinical small-animal PET/SPECT/CT system for multimodality imaging
Authors
Keiichi Magota
Naoki Kubo
Yuji Kuge
Ken-ichi Nishijima
Songji Zhao
Nagara Tamaki
Publication date
01-04-2011
Publisher
Springer-Verlag
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 4/2011
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-010-1683-y

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