Gantry mounted stereoscopic imaging system

• US 7,227,925 B1
• Filed: 10/02/2002
• Issued: 06/05/2007
• Est. Priority Date: 10/02/2002
• Status: Expired due to Term

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: Varian Medical Systems Technologies Inc (Siemens AG)
• Inventors: Marc, Marcel, Mansfield, Stan
• Primary Examiner(s): THOMAS, COURTNEY D
• Application Number:
  US10/264,111
• Time in Patent Office: 1,707 Days
• Field of Search: 378/65, 378/41, 378/64, 378/193, 378/197, 600/427
• US Class Current: 378/65
• CPC Class Codes: A61N 2005/1061 using an x-ray imaging system having a separate imaging source
• CPC Class Codes: A61N 5/1049 for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: A61N 5/1081 Rotating beam systems with a specific mechanical construction, e.g. gantries

Abstract

A radiation therapy treatment machine that has a stereoscopic imaging system, which includes a rotatable open gantry on which is placed a first diagnostic radiation source, a first diagnostic imager, and a therapeutic radiation source.

Claims

1. A radiation therapy treatment apparatus, comprising:

a rotatable gantry on which is disposed;

a first diagnostic radiation source protruding from a first location of the gantry;

a first diagnostic imager protruding from the gantry; and

a structure comprising a therapeutic radiation source protruding from a second location of the gantry, the first diagnostic radiation source and the therapeutic radiation source being different;

wherein the gantry rotates about an axis, and wherein the first diagnostic imager, and the structure comprising the therapeutic radiation source protrude from a plane perpendicular to the axis, and the first diagnostic radiation source is offset from a line extending through the therapeutic radiation source and the axis.

2. The apparatus of claim 1, further comprising a second diagnostic radiation source and a second diagnostic imager disposed on the rotatable gantry, the first diagnostic radiation source protruding from the plane, the second diagnostic radiation source protruding from the plane, and the second diagnostic imager protruding from the plane.

3. The apparatus of claim 2, wherein the first diagnostic radiation source and the second diagnostic radiation source are disposed at opposite sides of the therapeutic radiation source.

4. The apparatus of claim 3, wherein the first diagnostic radiation source and the second diagnostic radiation source are disposed approximately 45 degrees from the therapeutic radiation source.

5. The apparatus of claim 2, wherein the gantry is rotatable around a center line, the first diagnostic radiation source and first diagnostic imager are at a first set of opposing locations of the gantry, and the second diagnostic radiation source and second diagnostic imager are at a second set of opposing locations of the gantry;

further comprising a verification imager disposed on the rotatable gantry at a location opposing a location of the therapeutic radiation source of the gantry.

6. The apparatus of claim 1, further comprising a verification imager disposed on the rotatable gantry.

7. The apparatus of claim 1, further comprising a translatable patient bench.

8. The apparatus of claim 7, wherein the translatable patient bench to move in three planes.

9. The apparatus of claim 1, wherein the apparatus is an intensity modulated radiation therapy treatment machine.

10. The apparatus of claim 1, wherein the rotatable gantry is pivotably attached to a drive stand to provide 360 degree rotation.

11. The apparatus of claim 1, further comprises a computer system to generate a stereoscopic representation of a treatment volume from image data.

12. The apparatus of claim 11, wherein the stereoscopic representation to provide location information about the treatment volume to a multileaf collimator.

13. The apparatus of claim 1, wherein the first diagnostic imager is a flat-panel imager.

14. The apparatus of claim 1, wherein the gantry provides access by a care provider to a patient located along a center line of the gantry'"'"'s rotation.

15. An intensity modulated radiation therapy machine, comprising:

a rotatable gantry on which is disposed;

means for generating a stereoscopic representation of a treatment volume from image data coupled to a computer system; and

a therapeutic radiation source comprising a structure including a multileaf collimator coupled to the computer system

wherein the gantry rotates about an axis, and wherein a first diagnostic imager and the structure comprising the therapeutic radiation source protrude from a plane perpendicular to the axis, and the first diagnostic imager is offset from a line extending through the therapeutic radiation source and the axis.

16. The apparatus of claim 15, further comprising:

means for positioning the treatment volume relative to a therapeutic radiation source disposed on the rotatable gantry based on the stereoscopic representation of the treatment volume.

17. A method for operating a radiation therapy treatment machine, comprising:

positioning a rotatable gantry to a radial position with respect to a center line of the gantry'"'"'s rotation;

generating a first image of a treatment volume with a first kilovoltage (kV) radiation source and a first kV imager, the first kV radiation source disposed at a first location on the gantry;

generating a second image of the treatment volume with a second kV radiation source and a second kV imager, the second kV radiation source disposed at a second location on the gantry;

generating by computer, a stereoscopic representation of the treatment volume from a perspective of a third location on the gantry based on the first image and the second image;

targeting the treatment volume with data from the stereoscopic representation; and

applying a therapeutic radiation dose from the third location to the treatment volume.

18. The method of claim 17, wherein the therapeutic radiation dose is tailored by modifying parameters chosen from the group consisting of a time the therapeutic radiation is applied, a beam shape striking the treatment volume, a modulation of the beam shape, and an intensity of the therapeutic radiation.

19. The method of claim 17, wherein the imagers are flat-panel imagers.

20. The method of claim 17, further comprising repositioning the gantry to a different radial position with respect to the center line prior to applying the therapeutic radiation.

21. The method of claim 17, wherein the treatment volume is disposed within a patient, and further comprising a care provider accessing the patient after targeting and prior to applying.

22. A method for operating a radiation therapy treatment machine, comprising:

selecting a first image of a treatment volume from a first position;

selecting a second image of the treatment volume from a second position;

generating a stereoscopic representation of the treatment volume based on the first image and the second image; and

targeting the treatment volume from a third position with data from the stereoscopic representation,

wherein the first image is produced using a first radiation source and the second image is produced using a second radiation source disposed on the radiation therapy machine, wherein said first and said second radiation sources are angularly offset from each other.

23. The method of claim 22, further comprising:

applying therapeutic radiation to the targeted treatment volume from the third position.

24. The method of claim 22, further comprising generating the first image using a first kilovoltage radiation source and a first kilovoltage imager.

25. The method of claim 24, further comprising generating the second image using a second kilovoltage radiation source and a second kilovoltage imager.

26. The method of claim 24, further comprising generating the second image using a therapeutic radiation source and a verification imager.

27. The method of claim 22, further comprising:

generating the stereoscopic representation from a perspective of a third position; and

applying therapeutic radiation to the treatment volume based on the stereoscopic representation of the perspective of the third position.

28. The method of claim 22, further comprising using a computer to adjust a therapeutic radiation source position and a treatment bench to target the treatment volume with a therapeutic treatment beam.

29. The method of claim 22, wherein the generating the first image further comprises:

rotating a rotatable gantry to the first position and storing the first image in a computer.

30. The method of claim 22, wherein the generating the second image further comprises:

rotating a rotatable gantry to the second position and storing the second image in a computer.

31. The method of claim 24, further comprising generating the second image using the first kilovoltage radiation source and the first kilovoltage imager.

32. The method of claim 22 wherein the first and second images are a stored image and a generated image.