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Medical image processing system

  • US 5,172,419 A
  • Filed: 03/05/1991
  • Issued: 12/15/1992
  • Est. Priority Date: 03/05/1991
  • Status: Expired due to Term
First Claim
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1. A system for manipulating radiographic type images comprising,digital densitometer means, having a film support, a laser scanning device, a light detector and an analog-to-digital converter with an analog signal input connected to said light detector and a digital signal output, for creating a digital electrical signal, digital words in said digital electrical signal corresponding to the optical density of pixels comprising said radiographic image;

  • electronic storage means, connected to said densitometer, for receiving and storing said digital signal;

    signal processing means connected to said storage means for systematically transforming the digital signal values in order to alter the optical characteristics of said image pixels and hence of said radiographic images, said signal processing means containing evaluation means for receiving original film type inputs, determining original exposure characteristics, and modifying original data to enhance the optical characteristics of subsequent copies by calculating proper exposure per image, regardless of film type said copy is written on; and

    film writing means, connected to said processor means, having a film support, a modulated scanning laser device, and a data input for writing the transformed pixels to new film, producing a copy of said radiographic image.

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