EP 0349370 A1 19900103 - X-ray image intensifier device provided with a circuit to compensate for magnetic distortion effects.
Title (en)
X-ray image intensifier device provided with a circuit to compensate for magnetic distortion effects.
Title (de)
Mit Kompensationsschaltung gegen Einflüsse magnetischer Verzerrungen versehene Röntgenbildverstärkereinrichtung.
Title (fr)
Dispositif intensificateur d'images radiologiques muni d'un circuit de compensation des effets de distorsion magnétique.
Publication
Application
Priority
FR 8808960 A 19880701
Abstract (en)
[origin: US4945223A] To compensate for the effects of magnetic distortion in an X-ray image intensifier tube, the mode of scanning the target of the television camera associated with this tube is modified. Shifts, corresponding to measured distortions, are caused in the line scan and the vertical scan. In this way, an image which can be used in morphometry is restored on a display screen.
Abstract (fr)
Pour compenser les effets de distorsion magnétique, dans un tube (1) intensificateur d'images radiologiques on modifie (18-19) le mode de balayage de la cible (7) de la caméra (8) associée à ce tube. On provoque des décalages (H,V) du balayage ligne et du balayage vertical correspondant à des distorsions mesurées (20-24). De cette manière on restitue sur un écran de visualisation (29) une image utilisable en morphométrie.
IPC 1-7
IPC 8 full level
H01J 29/00 (2006.01); H01J 31/50 (2006.01)
CPC (source: EP US)
H01J 29/003 (2013.01 - EP US); H01J 2229/0038 (2013.01 - EP US)
Citation (search report)
- [A] US 3809889 A 19740507 - MCBROOM R
- [A] DE 3419043 A1 19851128 - SIEMENS AG [DE]
- [A] DE 2809725 A1 19790913 - LICENTIA GMBH
Designated contracting state (EPC)
DE ES GB IT NL
DOCDB simple family (publication)
EP 0349370 A1 19900103; FR 2633794 A1 19900105; JP 2766850 B2 19980618; JP H02210744 A 19900822; US 4945223 A 19900731
DOCDB simple family (application)
EP 89401676 A 19890615; FR 8808960 A 19880701; JP 16969289 A 19890630; US 37290389 A 19890629