Patent Number: 060524359
Section: claims

1. A system for delivering radiation from a radiation source to a body, comprising: means for generating an RF pulse;  means for generating an injector pulse; and  means for changing a phase between said RF pulse and said injector pulse.  generating an RF pulse;  generating an injector pulse; and  changing a phase between said RF pulse and said injector pulse.  an apparatus for delivering a predetermined radiation dose to a patient; and  a controller configured to vary a phase between an RF pulse and an injector pulse, whereby substantially no radiation is delivered to said patient when said RF pulse and said injector pulse are out of phase. 2. A system according to claim 1, further including means for performing an intensity modulated radiation treatment. 3. A system according to claim 2, said performing means including means for delivering an auto-sequence of a plurality of field segments. 4. A system according to claim 3, said phase changing means configured to change said phase between delivery of said plurality of field segments. 5. A system according to claim 4, including means for measuring delivered dosage. 6. A system according to claim 5, including phase changing means including means for determining when said delivered dosage has reached a predetermined level. 7. A system according to claim 1, said phase changing means comprising means for delaying said injector pulse relative to said RF pulse. 8. A method for delivering radiation from a radiation source to a body, comprising: 9. A method according to claim 8, further including means for performing an intensity modulated radiation treatment. 10. A method according to claim 9, said performing means including means for delivering an auto-sequence of a plurality of field segments. 11. A method according to claim 10, said phase changing means configured to change said phase between delivery of said plurality of field segments. 12. A method according to claim 11, including means for measuring delivered dosage. 13. A method according to claim 12, including phase changing means including means for determining when said delivered dosage has reached a predetermined level. 14. A method according to claim 8, said phase changing means comprising means for delaying said injector pulse relative to said RF pulse. 15. A radiation therapy system, comprising: 16. A radiation therapy system according to claim 15, said controller configured to delay said injector pulse relative to said RF pulse. 17. A radiation therapy system according to claim 16, said delay being about 2.8 milliseconds. 18. A radiation therapy system according to claim 15, said controller configured to provide an intensity modulated treatment. 19. A radiation therapy system according to claim 18, said controller configured to control delivery of an autosequence of a plurality of field segments. 20. A radiation therapy system according to claim 19, said controller configured to change said phase between delivery of said plurality of field segments.