Global Patent Index - EP 0021441 B1

EP 0021441 B1 19850417 - ELECTRON ACCELERATOR FOR X-RAY THERAPY

Title (en)

ELECTRON ACCELERATOR FOR X-RAY THERAPY

Publication

EP 0021441 B1 19850417 (DE)

Application

EP 80103661 A 19800627

Priority

DE 2926883 A 19790703

Abstract (en)

[origin: US4300055A] The invention relates to an electron accelerator including an evacuated acceleration tube, a target exposed to the electron beam, an electron absorber following the target in beam direction, a collimator and a compensation body arranged therein centered on the axis of symmetry thereof. In such electron accelerators, used in radiotherapy, the soft radiation component is to be suppressed as much as possible. To this end the invention provides a filter plate made of heavy metal beyond the electron absorber, while the compensation body is made of a material of comparatively low atomic number. The filter plate may be inserted between the electron absorber and the compensation body. The target may be provided on the side of the electron absorber facing the acceleration tube.

IPC 1-7

G21K 5/04; A61N 5/10

IPC 8 full level

H01J 35/00 (2006.01); A61N 5/10 (2006.01); G21K 1/10 (2006.01); G21K 3/00 (2006.01); G21K 5/02 (2006.01); G21K 5/04 (2006.01); G21K 5/08 (2006.01); H01J 35/08 (2006.01); H05H 7/00 (2006.01)

CPC (source: EP US)

G21K 1/10 (2013.01 - EP US); H01J 35/00 (2013.01 - EP US)

Citation (examination)

  • DE 2533348 A1 19760624 - CA ATOMIC ENERGY LTD
  • Radiology Nr. 115, Mai 1975, R.J. BOGE et al."Accessory Beam Flattering Filter for the Varian Clinac-4 Linear Accelerator" S. 475-477
  • Electromedica Nr. 3. 1979 (Auslieferungsdatum 14.08.79 siehe Eingabe 76 vom 19.05.83), W.E. SCHIEGL "Mevatron - das neue Konzept" S. 124-126

Designated contracting state (EPC)

DE FR GB SE

DOCDB simple family (publication)

EP 0021441 A2 19810107; EP 0021441 A3 19810114; EP 0021441 B1 19850417; CA 1139022 A 19830104; DE 2926883 A1 19810122; DE 3070505 D1 19850523; JP S5614199 A 19810210; JP S6312280 B2 19880318; US 4300055 A 19811110

DOCDB simple family (application)

EP 80103661 A 19800627; CA 355217 A 19800702; DE 2926883 A 19790703; DE 3070505 T 19800627; JP 9119780 A 19800703; US 15234980 A 19800522