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Thermographic apparatus

  • US 4,379,461 A
  • Filed: 09/17/1980
  • Issued: 04/12/1983
  • Est. Priority Date: 01/17/1979
  • Status: Expired due to Term
First Claim
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1. An apparatus for detecting circulation disturbances in the legs of a patient by measuring and recording the skin surface temperature along the legs of the patient, comprising:

  • at least one temperature sensor manually movable over the skin surface along the legs of a patient resting with his legs in a substantially horizontal position and capable of sensing the skin surface temperature of the momentarily adjacent portion of the patient'"'"'s leg and generating an electric signal corresponding thereto;

    a movable apparatus frame structure adapted to be located at the feet of a patient under examination;

    means mechanically connecting said temperature sensor to said apparatus frame and including signal generating means responsive to the movement of said temperature sensor relative to said apparatus frame and for generating an electric signal representing the position of the temperature sensor along its path of movement;

    signal recording means mounted in said apparatus frame for receiving said temperature signal and said position signal and capable of recording the temperature being sensed as a function of the position of the temperature sensor; and

    digital signal processing means mounted in said apparatus frame for receiving said temperature and position signals and including data storing means for storing associated values of said temperature and position signals from at least two, different, measured temperature-position-relations and calculating means for comparing the temperature values as a function of the position for said two temperature-position-relations stored in said storing means and for producing signals representing the temperature difference as a function of the position for said two temperature-position relations, said recording means being capable of receiving said last mentioned signals for recording said temperature difference as a function of the position.

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