X-ray or gamma ray systems or devices – Miscellaneous
Patent
1996-05-23
1997-09-16
Porta, David P.
X-ray or gamma ray systems or devices
Miscellaneous
378 19, H05G 108
Patent
active
056688504
ABSTRACT:
A method and apparatus to facilitate avoiding failure of a computed tomography x-ray source while performing a patient scan permits detection of the onset of a potential x-ray source failure and estimation of the x-ray source life expectancy. The information obtained can be used in deciding whether to repair or replace an x-ray source prior to failure. In one embodiment, signals I(x,y) representative of the x-ray beam optical focal spot detected by a detector array are sampled, and a wavelet transform is applied to the sampled signals I(x,y) to generate at least one energy level F.sub.new for a wavelet band. The energy level P.sub.new is compared with stored energy levels P.sub.stored to identify one of the energy levels P.sub.stored which, when subtracted from energy level P.sub.new, results in a statistically non-significant value. The remaining life of the x-ray source is estimated as being equal to the life expectancy value corresponding to the identified energy level P.sub.stored.
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Bruce David Vernon
General Electric Company
Porta David P.
Snyder Marvin
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