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Dynamic radiation therapy simulation system

  • US 7,349,522 B2
  • Filed: 06/22/2005
  • Issued: 03/25/2008
  • Est. Priority Date: 06/22/2005
  • Status: Expired due to Fees
First Claim
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1. A method for dynamic radiation therapy simulation of a treatment plan for a patient, comprising the steps of:

  • storing on a computer readable medium a set of reference images of the patient,planning a multi-leaf collimator plan for dynamic radiation therapy for the patient comprising a sequence of plan images and storing said plan images on a computer readable medium;

    acguiring a sequence of real-time fluoroscopic images of the patient over at least one respiration cycle of the patient;

    correcting image intensifier distortion of said fluoroscopic images in real-time; and

    displaying the plan or reference images overlying the corrected fluoroscopic images in real-time;

    wherein a respiration cycle indicator indicates the respiratory cycle by changes in the circumference of the patient'"'"'s chest; and

    wherein said respiration cycle indicator comprises a belt for encircling the patient'"'"'s chest, said belt having an elastic portion extending between a first point and a second point on said belt;

    a tube having a first end in a fixed relationship to said first point;

    a flexible wire having a first end affixed to said second point, said wire passing through said tube and extending beyond a second end of said tube;

    a radio-opaque marker attached to a second end of said flexible wire whereby changes in circumference of the patient'"'"'s chest effect a linear translation of said marker.

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