Elekta Ab

Scienta Omicron Ab

Anders Nilsson

Ivars Alksnis

Gert Hanner

Peter Fröberg

Peter Amann

An aperture device () is described, which is attachable to a lens system (). The lens system () is arranged to form a particle beam of charged particles, emitted from a sample surface (Ss). The aperture device () comprises an end surface (S) which is to be arranged facing the sample surface (Ss), at least one aperture () arranged in the end surface (S), a length axis () which extends through the centre of said at least one aperture (), and at least one gas outlet (), which is arranged at a transverse distance (T) perpendicular from the length axis (), and is arranged to direct gas into a volume between at least one aperture () and the sample surface (Ss). The end surface (S) within a distance, equal to ⅓ of the transverse distance (T), perpendicular from the length axis () has a variation along the length axis () being smaller than ⅙ of the transverse distance (T).

Aperture device and analyzer arrangement

A radiation therapy device and a method of changing the spatial dose distribution surrounding a focus are disclosed. A subset of radioactive sources in a source carrier arrangement is displaceable relatively to collimator passage inlets, while the rest of the sources are fixed relatively to said collimator passage inlets.

Radiation therapy device

A radiation therapy device and a method of changing the spatial dose distribution surrounding a focus are disclosed. At least a subset of the radioactive sources in a source carrier is linearly displaceable relatively to at least a subset of collimator passage inlets, or vice versa.

Growing community of inventors

Stockholm, Sweden

Anders Nilsson