Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1995-06-09
1996-12-17
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036304, 250369, G01T 1164, G01T 1208
Patent
active
055856373
ABSTRACT:
A multi-detector head nuclear camera system automatically switchable (and optimized) to perform either SPECT imaging or PET imaging. The camera system employs, in one embodiment, multi-detector configuration having dual head scintillation detectors but can be implemented with more than two detector heads. The detectors contain switchable triggering circuitry so that coincidence detection for PET imaging and non-coincidence detection for SPECT imaging is available. Using a variable integration technique with programmable integration interval, the event detection and acquisition circuitry of the camera system is switchable to detect events of different energy distribution and count rate which are optimized for PET and SPECT imaging. The system also includes dual integrators on each scintillation detector channel for collecting more than one event per detector at a time for PET or SPECT mode. In PET or SPECT mode, the system also employs variable PMT cluster sizing having smaller cluster sizes for PET imaging and relatively larger cluster sizes for SPECT. In PET or SPECT mode, the system also employs variable centroid shape and zonal triggering. Utilizing the above programmable settings, the camera system can be automatically configured to operate in either SPECT or PET imaging modes.
REFERENCES:
patent: 4057727 (1977-11-01), Muehllehner et al.
patent: 5493120 (1996-02-01), Geagan
A. M. J. Paans, et al., "Performance Parameters of a Longitudinal Tomographic Positron Imaging System," reprinted from Nuclear Instruments & Methods, vol. 192, pp. 491-500 (1982).
G. Muehllehner, et al., "Performance Parameters of a Positron Imaging Camera," IEEE Transactions on Nuclear Science, vol. NS-23, No. 1, pp. 528-537 (Feb. 1976).
M. Tanaka, Y. Hirose, K. Koga, H. Hattori, "Engineering Aspects of a Hybrid Emission Computed Tomograph" IEEE Trans. Nuc. Sci. vol. 28, No. 1 (Feb. 1981) pp. 137-141.
Bertelsen Hugo
Hines Horace H.
Murphy Matthew J.
Nellemann Peter
Wellnitz Donald R.
ADAC Laboratories
Hannaher Constantine
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