Granted Patent B2

US 11,135,451 · App. 16/903,736 · Granted Oct 5, 2021

Inventors: Daniel J. Raymond (Windham, NH); W. Davis Lee (Rockport, ME); James P. Bennett (Birmingham, AL)

A61N5/1077A61B6/03A61N5/1044A61N5/1067A61N5/1082G21K1/087G21K1/093G21K5/04A61N5/107A61N2005/1074A61N2005/1087A61N2005/1097H01J35/14

Abstract

Claims (25)

1. A method for treating a tumor of a patient, in a beam treatment center comprising a floor, with positively charged particles, comprising the steps of:

mounting a synchrotron to an elevated floor section above the floor of the beam treatment center;

transporting the positively charged particles from said synchrotron, through said beam transport system, to a position above a patient positioning system; said step of transporting further comprising the steps of:

at a first time, passing the positively charged particles through a first fixed-position beam transport line terminating along a first axis;

at a second time, passing the positively charged particles through a second fixed-position beam transport line terminating along a second axis within twenty degrees of ninety degrees off of the first axis; and

at a third time, passing the positively charged particles through a third fixed-position beam transport line terminating along a third axis within twenty degrees of forty-five degrees off of at least one of the first axis and the second axis,

wherein none of said synchrotron and said beam transport system penetrate through the floor of the beam treatment center.

2. The method of claim 1 , further comprising the step of:

repositioning a repositionable nozzle system from a first termination end of said first fixed-position beam transport line at a first time to a second termination end of said second fixed-position beam transport line at a second time and to a third termination end of said third fixed-position beam transport line at a third time.

3. The method of claim 2 , further comprising the step of:

moving said repositionable nozzle system along a nozzle track, said nozzle track forming an arc of a circle, the center of the circle comprising an isocenter; and

said patient positioning system positioning the tumor at the isocenter.

4. The method of claim 2 , further comprising the step of:

said first fixed-position beam transport line directing the positively charged particles to three entry points of a treatment zone position along a horizontal treatment plane, said second fixed-position beam transport line, and said third fixed-position beam transport line, wherein all magnets of said first fixed-position beam transport line, said second fixed-position beam transport line, and said third fixed-position beam transport line are positioned on said horizontal beam treatment plane.

5. The method of claim 2 , further comprising the steps of:

at the first point in time, transporting the positively charged particles through a vertical beam treatment plane and all magnets of said first fixed-position beam transport line;

at the second point in time, transporting the positively charged particles along the vertical treatment beam while passing the positively charged particles through said second fixed-position beam transport line, and

at the third point in time, transporting the positively charged particles along the vertical treatment beam while passing the positively charged particles through said third fixed-position beam transport line.

6. The method of claim 1 , further comprising the step of:

directing the positively charged particles at an upward treatment angle through said third fixed position beam transport line terminating in said upward treatment angle, said upward treatment angle within twenty degrees of forty-five degrees of horizontal.

7. The method of claim 1 , said step of transporting further comprising the step of:

said third fixed-position beam transport line guiding the positively charged particles from a first point above a plane of magnets of said synchrotron to a second point below said plane of magnets of said synchrotron, and to an upward treatment angle to a position above said patient positioning system, wherein the positively charged particles used to treat the tumor do not pass below a level of the floor.

8. The method of claim 1 , further comprising the steps of:

passing the positively charged particles from said synchrotron at a downward extraction angle through a Lambertson magnet; and

said step of passing extracting the positively charged particles to a level below said synchrotron and above the floor of the beam treatment center to a starting position of the beam transport system, said beam transport system installed entirely above the floor of the beam treatment center.

Assignments (1)

Continuity (15)