Medical computer tomography unit has a beam collimating arrangement with two curved absorbers that can be moved by adjustment elements such that they are moved in a direction perpendicular to their longitudinal axes

Computer tomography unit has an X-ray source that can be rotated about a system axis (Z), an X-ray detector and a screening device for variable limiting of the extent of a beam bundle. The absorber elements (30, 31) of the screening device are curved and an adjustment element acts on the absorbers s...

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Bibliographic Details
Main Authors SUESS, CHRISTOPH, DISTLER, FRIEDRICH, SEUFERT, MATTHIAS
Format Patent
LanguageEnglish
German
Published 25.03.2004
Edition7
Subjects
DIAGNOSIS
GAMMA RAY OR X-RAY MICROSCOPES
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
IRRADIATION DEVICES
MEDICAL OR VETERINARY SCIENCE
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
SURGERY
TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR
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Summary:Computer tomography unit has an X-ray source that can be rotated about a system axis (Z), an X-ray detector and a screening device for variable limiting of the extent of a beam bundle. The absorber elements (30, 31) of the screening device are curved and an adjustment element acts on the absorbers such that they are moved in a direction perpendicular to their longitudinal axes, particularly in a direction parallel to the system axis. The invention also relates to a corresponding method for operating a computer tomography unit. Die Erfindung betrifft ein Computertomographiegerät (1) mit einem um eine Systemachse (Z) rotierbaren Röntgenstrahler (2), mit einem Röntgendetektor (5) und mit einer strahlerseitigen Einblendvorrichtung (3), die zur variablen Begrenzung des Strahlenbündels zwei einander gegenüberliegende und geradlinig verstellbare, insbesondere bezüglich ihres Abstandes zueinander verstellbare, Absorberelemente (30, 31), aufweist. Die Absorberelemente (30, 31) weisen eine gekrümmte Form auf. Die Einblendvorrichtung (3) umfasst eine Stelleinrichtung, die derart auf die Absorberelemente (30, 31) einwirkt, dass die Absorberelemente (30, 31) senkrecht zu ihrer Längsrichtung, insbesondere in einer Richtung parallel zur Systemachse (Z) bewegbar sind. Die Absorberelemente (30, 31) sind insbesondere lineargeführt und vorzugsweise unabhängig voneinander bewegbar.
Bibliography:Application Number: DE20021042920