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Method of examining x-rays

  • US 3,283,071 A
  • Filed: 06/04/1963
  • Issued: 11/01/1966
  • Est. Priority Date: 06/04/1963
  • Status: Expired due to Term
First Claim
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1. A METHOD OF CONDUCTING AN X-RAY EXAMINATION OF A SUBJECT DURING WHICH A CONTRAST MEDIUM IS INJECTED INTO THE SUBJECT, SAID METHOD INCLUDING THE STEPS OF:

  • (A) TAKING A FIRST X-RAY PHOTOGRAPH OF THE SUBJECT PRIOR TO THE INJECTION OF THE CONTRAST MEDIUM, (B) TAKING A SIMILAR SECOND X-RAY PHOTOGRAPH OF THE SUBJECT AFTER THE INJECTION OF THE CONTRAST MEDIUM, (C) POSITIONING SAID FIRST X-RAY PHOTOGRAPH BEFORE A FIRST TELEVISION CAMERA AND SAID SECOND X-RAY PHOTOGRAPH BEFORE A SECOND TELEVISION CAMERA, (D) CONVERTING SAID FIRST X-RAY PHOTOGRAPH INTO A FIRST ELECTRICAL SIGNAL BY MEANS OF SAID FIRST TELEVISION CAMERA AND CONVERTING SAID SECOND X-RAY PHOTOGRAPH INTO A SECOND ELECTRICAL SIGNAL BY MEANS OF SAID SECOND TELEVISION CAMERA, (E) REVERSING THE POLARITY OF ONE OF SAID FIRST AND SECOND ELECTRICAL SIGNALS TO FORM A NEGATIVE PICTURE, (F) COMBINING SAID ONE REVERSED POLARITY ELECTRICAL SIGNAL AND THE OTHER ELECTRICAL SIGNAL TO FORM A COMPOSITE ELECTRICAL SIGNAL, (G) PROVIDING A TELEVISION REPRODUCTION OF SAID COMPOSITE ELECTRICAL SIGNAL, AND (H) POSITIONING ONE OF SAID FIRST AND SECOND X-RAY PHOTOGRAPHS SO THAT AND SECOND X-RAY PHOTOGRAPHS REPRESENTS SAID FIRST AND SECOND X-RAY PHOTOGRAPHS EXACTLY SUPERIMPOSED.

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