Dynamic radiation therapy simulation system
First Claim
Patent Images
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for dynamic treatment simulation for radiotherapy. Software is implemented on a computer system to perform dynamic simulation by displaying every segment of dynamic treatment beams on top of real-time fluoroscopic image sequences. Automated distortion correction of the fluoroscopic image due to the image intensifier is performed in real-time. A respiration phase indicator measures changes in circumference of the patient'"'"'s chest through the movement of a radio-opaque marker that appears directly in the fluoroscopic images of the patient.
-
Citations
4 Claims
-
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. - View Dependent Claims (2, 3, 4)
-
Specification