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J Nucl Med. 2008; 49 (Supplement 1):125P
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Instrumentation & Data Analysis: Instrumentation

SPECT

New high resolution detectors for SPECT

Tumay Tumer1, Victoria Cajipe1, Martin Clajus1, Satoshi Hayakawa1 and Alexander Volkovskii1

1 NOVA R&D, Inc., Riverside, California

497

Objectives: To develop new high spatial and energy resolution photon counting detectors for Gamma Camera and SPECT application. These detectors may also be modified and optimized for application to small animal imaging, including small animal PET.

Methods: We have developed new 1D and 2D photon counting detectors with high spatial resolution of 2x2 or 0.5x0.5 mm2 pitch, respectively. The pitch has potential to be reduced even smaller if needed. To improve photon counting statistics per pixel the adjacent pixels can be added to increase statistics with some compromise on spatial resolution. For example 2x2 adjacent pixels can be combined to produce images with 1x1 mm2 pitch spatial resolution. The detector also has high energy resolution due to the use of solid state detectors. The preliminary energy resolution is 4% or 2% @ 122 keV photon energies for 1D and 2D detectors, respectively. We expect to improve on these energy resolutions for the annual meeting. A low noise 36 channel integrated readout electronics has been designed and manufactured for the 1D detector. This system is mainly developed for applications that need >1x1 mm2 pixel pitch. A 16x16=256 pixel integrated readout electronics has been designed and manufactured for the 2D detector. This detector is mainly developed for applications that use <1x1 mm2 pixel pitch. A photograph of a 2D detector on the Evaluation System and graphs of linearity and spectra are attached.

Results: We have carried out initial testing of these two detector prototypes. New second version prototypes are being manufactured and will be ready for testing by the end of January. We will report the results of our first and second version prototype detector measurements.

Conclusions: The results are showing strong potential for improving both the spatial and energy resolutions of present SPECT systems.

Research Support: DAAE30-02-C-1015 & DAAE30-03-C-1074





This Article
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Right arrow Articles by Tumer, T.
Right arrow Articles by Volkovskii, A.
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Right arrow Articles by Tumer, T.
Right arrow Articles by Volkovskii, A.