Claims
- 1. An improved x-ray generator for tomography apparatus of the type having
- means for automatically establishing an initial tube current for the x-ray tube and for automatically setting the exposure period,
- a radiation detector for measuring the intensity of radiation reaching the film, and
- control means responsive to the measured intensity and the set exposure period for automatically adjusting the current of the x-ray tube to an adjusted current which more optimally exposes the film, the current of the x-ray tube being adjusted during an initial time period t.sub.1 of the exposure period,
- the improvement comprising
- means for integrating the difference between the initial tube current and the actual tube current during an initial time period t.sub.1 ' of the exposure period, t.sub.1 ' being less than t.sub.1 ; and
- means responsive to the integrated difference, when the integrated difference exceeds a predetermined threshold, for automatically correcting the established initial tube current to a corrected value for the next exposure which more closely approximates the adjusted current and which reduces the integrated difference during the next exposure.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2350391 |
Oct 1973 |
DT |
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Parent Case Info
This is a continuation of application Ser. No. 512,842, filed Oct. 7, 1974 abandoned.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
Country |
Parent |
512842 |
Oct 1974 |
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