The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1993
Filed:
Jun. 15, 1992
Pekka Strommer, Espoo, FI;
Planmed Oy, , FI;
Abstract
Method in x-ray diagnostics for regulating the exposure of a film or equivalent to an optimal level. The radiation that has passed through an object is measured by detectors and, based on this measurement, the time of exposure regulated. The measurement signals are passed from the detector or from different detectors to an amplifier associated with each detector. The amplifications of the amplifiers are initially calibrated by exposing a reference object to a predetermined dosage, passing the amplified signals from the detectors one at a time to an integrator for an initial switching period, comparing each amplified and integrated signal with a reference value, and independently adjusting the switching period of each amplified signal to produce amplification values so that each detector and amplifier gives an integrated signal equal to the reference value.