Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1998-10-23
2000-12-12
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036302, 25036303, 250369, 250395, G01T 1208
Patent
active
061602590
ABSTRACT:
A method and apparatus for selectively integrating PMT channel signals in a gamma camera system are described. A trigger word is decoded to determine which of multiple PMT channels are affected by a given scintillation event. When two scintillation events overlap both spatially and temporally, only those channels which are affected by both events stop integrating in response to the second event. Pre-pulse pile-up is corrected by removing the tail of a preceding pulse from a current pulse using an approximation of the tail of the preceding pulse based upon the instantaneous energy of the current pulse and the current countrate. Extrapolation of the tail of the current pulse may also be performed in essentially the same manner.
REFERENCES:
patent: 4071761 (1978-01-01), Horrocks
patent: 4181855 (1980-01-01), Horrocks
patent: 4418282 (1983-11-01), Horrocks
patent: 5210423 (1993-05-01), Arseneau
patent: 5225682 (1993-07-01), Britton, Jr. et al.
patent: 5296708 (1994-03-01), Moyers et al.
patent: 5444252 (1995-08-01), Hug et al.
patent: 5461232 (1995-10-01), McCandless et al.
patent: 5471061 (1995-11-01), Moyers et al.
patent: 5493120 (1996-02-01), Geagan
patent: 5508524 (1996-04-01), Goldberg et al.
patent: 5539202 (1996-07-01), Geagan et al.
patent: 5552606 (1996-09-01), Jones et al.
patent: 5565684 (1996-10-01), Gullberg et al.
patent: 5585637 (1996-12-01), Bertelsen et al.
patent: 5608221 (1997-03-01), Bertelsen et al.
patent: 5646408 (1997-07-01), Goldberg et al.
James A. Sorenson, Ph.D., et al., Physics in Nuclear Medicine, W.B. Saunders Company, 2nd Ed., Philadelphia, 1987, pp. 438-442.
Robert Anthony Dekemp, B.A.Sc., Attentuation Correction Positron Emission Tomography Single Photon Transmission Measurement, Sep. 1992, McMaster Univ., Hamilton (ON), 106 pgs.
Siu K. Yu and Claude Nahmias, Single Photon Transmission Measurements in Positron Tomography Using .sup.137 Cs, 1995, McMaster Univ., Hamilton (ON), 29 pgs.
Karp, et al., Singles Transmission in Positron Emission Tomography Using .sup.137 Cs, from 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference record vol. 13, University of Pennsylvania and UGM Medical Systems (Philadelphia, PA) pp. 1363-1367.
P. Nellemann, et al., Performance Characteristics of a Dual Head Spect Scanner with Pet Capability, From 1995 IEEE Nuclear Science Symposium conference record vol. 3, ADAC Laboratories and UGM Laboratory, pp. 1751-1755.
Karp, et al., Singles Transmission in Volume-Imaging Pet with a .sup.137 Cs Source, Phys. Med. Biol., vol. 40, 1995, pp. 929-944.
Bailey, et al., ECART ART--A Continuously Rotating Pet Camera: Performance Characteristics, Initial Clinical Studies, and Installation Considerations in a Nuclear Medicine Department, European Journal of Nuclear Medicine, vol. 24, No. 1, Jan. 1997, London (UK) and Knoxville (TN), 10 pgs.
Robert A. De Kemp, et al., Attentuation Correction in Pet Using Single Photon Transmission Measurement, Med. Phys., vol. 21, No. 6, Jun. 1994, pp. 771-778.
G. Muehllehner, et al., "Performance Parameters of a Positron Imaging Camera," IEEE Transactions on Nuclear Science, vol. NS-23, Feb. 1976, pp. 528-537.
R.A. De Kemp, et al., Design and Performance of 3D Photon Transmission Measurement on a Positron Tomograph with Continuously Rotating Detectors, International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 1995, Ottowa and Hamilton (ON), Knoxville (TN), pp. 51-54.
Gerd Muehllehner, Positron Camera with Extended Counting Rate Capability, Journal of Nuclear Medicine, vol. 15, No. 7, Jul. 1975, pp. 653-657.
Karp et al., Continuous-Slice Penn-Pet: A Positron Tomograph with Volume Imaging Capability, Journal of Nuclear Medicine, vol. 13, No. 5, May 1990, pp. 617-627,
R.J. Smith et al., "Singles Transmission Scans Performed Post-Injection for Quantitative Whole Body PET Imaging," 1996 IEEE Nuclear Science Symposium Conference Record, vol. 3, Nov. 1996, Philadelphia (PA), 7 pgs.
Karp, et al., Abstract No. 156 From proceedings of the 41st Annual Meeting, Scientific Papers, vol. 35, No. 5, Attentuation Correction in PET Using a Singles Transmission Source, May 1994, Philadelphia (PA), p. 41P.
G. Muehllehner, et al., Abstract No. 284, From proceedings of the 42nd Annual Meeting, Scientific Papers, SPECT Scanner with PET Coincidence Capability, Journal of Nuclear Medicine, Jun. 14, 1995, p. 70P.
Glenn F. Knoll, University of Michigan, Radiation Detection and Measurement, Second Edition, John Wiley & Sons, Inc., New York, 1979, pp. 120-129 and 597-598.
James K. O'Donell, M.D., "Nuclear Medicine Camera Improves Image Quality and Patient Throughput", ADVANCE for Administrators in Radiology, Aug. 1997, pp. 82-83.
Wong, W.H. et al., "A Scintillation Detector Signal Processing Technique with Active Pileup Prevention for Extending Scintillation Count Rates," IEEE Nuclear Science Symposium and Medical Imaging Conference, Albuquerque, New Mexico, Nov. 9-15, 1997, 5 pages.
Abstract, Wong, W.H. et al, "An Ultra-High Count-Rate Position Decoding and Energy Measuring Method for Cameras Using Anger Logic Detectors", 1997 IEEE Nuclear Science Symposium and Medical Imaging Conference, Albuquerque, New Mexico, Nov. 9-15, 1997, p. 88.
Lewellen, Thomas K., et al., "Evaluation of a Clinical Scintillation Camera with Pulse Tail Exptrapolation Electronics", The Journal of Nuclear Medicine, vol. 30, Sep. 1989, pp. 1554-1558.
P. Stentstrom et al., "A New Scalable Modular Data Acquisition System for SPECT (PET)", IEEE Transactions on Nuclear Science, vol. 45, No. 3, Jun. 1998, pp. 1117-1121.
International Commission on Radiation, Units and Measurements, "The Poisson Process", Particle Counting in Radioactivity Measurements, ICRU Report 52, Bethesda, MD, Nov. 1994, pp. 3-17.
Wong, Wai-Hoi, et al., "A High Count Rate Position Decoding and Energy Measuring Method for Nuclear Cameras Using Anger Logic Detectors", IEEE Transactions on Nuclear Science, vol. 45, No. 3, Jun. 1998, pp. 1122-1127.
D.-C. Yu, et al., "Extending the Usable Areas of Modular NaI(T1) Detector Using Crystal Treatment", IEEE, May 1998, 4 pages.
Petrillo Michael J.
Scharf Thomas E.
Wellnitz Donald R.
ADAC Laboratories
Gabor Otilia
Hannaher Constantine
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