Radiant energy – Invisible radiant energy responsive electric signalling – Methods
Reexamination Certificate
2007-09-11
2007-09-11
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Methods
C250S252100
Reexamination Certificate
active
11006772
ABSTRACT:
A method is for operation of a counting radiation detector, in particular of a counting X-ray detector, with improved linearity, in which each detector element of the counting radiation detector supplies counting pulses at counting rates as a function of a number of radiation quanta which occur per unit time during operation. In the method, the counting rates which are supplied from each detector element or from subsections of the detector element are converted via a functional relationship to actual counting rates or are multiplied by correction factors which are dependent on the magnitude of the counting rates. The correction factors are determined in advance for the respective detector element or for the subsections of it, and any discrepancy (which occurs as a result of a dead time of the detector element, for example) in the counting rates is corrected from the actual number of radiation quanta which arrive per unit time. The method allows the linearity of counting radiation detectors to be improved, particularly at high radiation intensities, so that the linearity condition for X-ray CT systems is also satisfied.
REFERENCES:
patent: 5943388 (1999-08-01), Tümer
patent: 6403960 (2002-06-01), Wellnitz et al.
patent: 6519306 (2003-02-01), Matsumiya
patent: 7139362 (2006-11-01), Heismann et al.
patent: 2004/0174948 (2004-09-01), Kojima et al.
patent: 11 65 771 (1964-03-01), None
patent: 100 20 425 (2000-12-01), None
patent: 102 12 638 (2003-10-01), None
Petzold W., Messung van Zählverlusten durch Vergleich zweier unabhängiger Zählkreise, Zeitschrift für angewandte Physik; XV. Band, Heft Feb. 1963, p. 158-160.
Prest M. et al., Frost: a low-noise high-rate photon counting ASIC for X-ray applications. Nuclear Instruments and Methods in Physics Research A 461 (2001) 435-439.
Glenn F. Knoll, Radiation Detection and Measurement, John Wiley & Sons, New York 1979, p. 95-103.
German Office Action dated Feb. 15, 2007.
Heismann Bjoern
Janssen Silke
Van Der Haar Thomas
Harness Dickey & Pierce PLC
Porta David
Siemens Aktiengesellschaft
Vu Mindy
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