×

Neutron irradiation therapy machine

  • US 4,112,306 A
  • Filed: 12/06/1976
  • Issued: 09/05/1978
  • Est. Priority Date: 12/06/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. In a neutron irradiation therapy machine for treating patients with a beam of neutrons:

  • cyclotron means for accelerating protons to a high energy and for bombarding a target to generate a beam of high energy neutrons to be applied to the patient, said cyclotron means having magnet means for generating a magnetic field for interaction with the protons, said magnet means including a pair of pole portions spaced apart to define a magnetic gap therebetween and within which the magnetic field of said magnet means produces a force on said protons, said magnet means having a yoke means of ferromagnetic material interconnecting said pair of pole portions for providing a relatively low reluctance magnetic flux path for returning the magnetic flux to the respective pole portions, magnetomotive force generating mean coupled in magnetic flux exchanging relation with said pole portions for generating a magnetomotive force and for exciting said magnetic pole portions to opposite magnetic polarities,proton source means for supplying protons to the region between said pole portions to be accelerated to an energy in excess of 15 MeV, andgantry means for pivoting said cyclotron about a patient treatment region,neutron filter means disposed in the neutron beam between the target and the patient treatment region for attenuating relatively low energy neutrons of the beam.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×