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Method of and system for stabilizing high voltage power supply voltages in multi-energy computed tomography

  • US 7,136,451 B2
  • Filed: 10/05/2004
  • Issued: 11/14/2006
  • Est. Priority Date: 10/05/2004
  • Status: Expired due to Fees
First Claim
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1. A method of stabilizing commanded DC and AC voltages supplied by a High Voltage Power Supply (HVPS) in multi-energy X-ray computed tomography using projection data acquired by scanning objects, wherein the projection data include a set of low energy projections and a set of high energy projections using at least two x-ray spectra, wherein a copper filter is mounted relative to at least a portion of a scanner'"'"'s detector array, comprising:

  • A. generating air ratios and copper ratios from said low and high energy projections;

    B. computing voltage ratios from said air ratios and copper ratios;

    C. computing HVPS DC and AC voltages from said voltage ratios;

    D. providing feedback as a function of computed HVPS DC and AC voltages to simultaneously stabilize the commanded HVPS DC and AC voltages.

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