X-ray apparatus for applying a predetermined flux to an...

A - Human Necessities – 61 – B

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A61B 6/02 (2006.01) A61N 5/10 (2006.01) G21K 5/04 (2006.01) G21K 5/10 (2006.01) H01J 35/32 (2006.01) H05G 1/06 (2006.01)

Patent

CA 2194759

The present invention is directed to an x-ray source (10) for irradiating a surface defining a body cavity. The source comprises a housing (12), an elongated tubular probe (14), a target assembly (26), and an inflatable balloon (410). The housing (12) encloses an electron beam source (22) and includes elements (23) for generating an electron beam along a beam path. The tubular probe (14) extends along a central axis from the housing (12) about the beam path. The target assembly (26) extends along the central axis and is coupled to the probe distal end. The target assembly (26) includes a target element (26A, 26B) adapted to emit x-rays in response to electrons incident thereon. The probe tip assembly and associated control electronics include elements for positioning the target element in the beam path, and is substantially x-ray transparent. The balloon (410) affixed to the distal end is inflatable so as to be inflated to stretch the cavity to a shape, thus allowing a uniform delivery of dose of radiation to the surface defining a body cavity.

La présente invention se rapporte à une source de rayons X (10) irradiant une surface délimitant une cavité du corps. La source comprend un corps (12), une sonde tubulaire allongée (14), un ensemble de ciblage (26) et un ballonnet gonflable (410). Le corps (12) renferme une source de faisceaux d'électrons (22) et comprend des éléments (23) qui génèrent un faisceau d'électrons le long d'une trajectoire. La sonde tubulaire (14) s'étend le long d'un axe central partant du corps (12) et entoure la trajectoire du faisceau. L'ensemble de ciblage (26) s'étend le long de l'axe central et est couplé à l'extrémité distale de la sonde. Cet ensemble de ciblage (26) comprend un élément cible (26A, 26B) conçu pour émettre des rayons X en réponse à des électrons tombant sur celui-ci. L'ensemble pointe de la sonde et le dispositif électronique de commande associé comprennent des éléments positionnant l'élément cible dans la trajectoire du faisceau et qui est pratiquement transparent aux rayons X. Le ballonnet (410) fixé à l'extrémité distale est gonflable de façon à étirer la cavité et lui donner une forme qui permet d'administrer uniformément une dose de rayonnement sur la surface délimitant une cavité du corps.

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