X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1985-11-05
1988-02-16
Howell, Janice A.
X-ray or gamma ray systems or devices
Specific application
Absorption
2504921, 2504923, 378146, A61N 510
Patent
active
047260467
ABSTRACT:
A radiotherapy machine includes a microwave powered accelerator to produce an energetic beam of charged particles, bending and focussing magnets to parallel scan the beam in a plane and collimators to make the resulting parallel scanned beam into paraxial rays of charged particles or X-rays. The beam is intensity modulated as it is scanned to control dosage spatial distribution. The subject is moved perpendicular to the scanning plane in order to treat a 3-dimensional shape.
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Cole Stanley Z.
Fisher Gerald M.
Howell Janice A.
Porta David P.
Varian Associates Inc.
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