Abstract: The present invention provides an assembly comprising two plates or covers, one of which being an outermost plate or cover, and both, at least in part having a perforation pattern over a surface area covering an open side of a crucible having a bottom and surrounding side walls containing raw materials, wherein said outermost cover is mounted at a distance farther from the said crucible than said cover covering said open side of a crucible, and wherein both covers are mounted versus each other, so that, when viewed through an axis in a direction perpendicular to the bottom of the crucible from a distance to said outermost cover of at least 10 times the distance between said two plates or covers, its contents cannot be observed as their perforations and the crucible are never forming one line, perpendicular to the plane formed by said bottom.

Abstract: A phosphor or scintillator sheet, web or panel is provided, wherein a phosphor or a scintillator layer is coated onto a flexible substrate, the stiffness of which is lowered by presence of pits or grooves onto said substrate, preferably applied by a technique selected from the group consisting of mechanical, chemical, (laser) optical, electrical and photo-etching techniques.

Abstract: Crucibles having a bottom and surrounding side walls, provided with electrode clamps at exterior sites of side walls located opposite with respect to each other, wherein said sites are extending as lips at said side walls, and wherein said clamps are connectable with electrodes for heating said crucible, are improved in that a cross-section of each of said lips between between crucible wall and clamp is reduced with at least 5%.

Abstract: The present invention provides an assembly comprising two plates or covers, one of which being an outermost plate or cover, and both, at least in part having a perforation pattern over a surface area covering an open side of a crucible having a bottom and surrounding side walls containing raw materials, wherein said outermost cover is mounted at a distance farther from the said crucible than said cover covering said open side of a crucible, and wherein both covers are mounted versus each other, so that, when viewed through an axis in a direction perpendicular to the bottom of the crucible from a distance to said outermost cover of at least 10 times the distance between said two plates or covers, its contents cannot be observed as their perforations and the crucible are never forming one line, perpendicular to the plane formed by said bottom.

Abstract: The present invention provides an assembly comprising two plates or covers, one of which being an outermost plate or cover, and both, at least in part having a perforation pattern over a surface area covering an open side of a crucible having a bottom and surrounding side walls containing raw materials, wherein said outermost cover is mounted at a distance farther from the said crucible than said cover covering said open side of a crucible, and wherein both covers are mounted versus each other, so that, when viewed through an axis in a direction perpendicular to the bottom of the crucible from a distance to said outermost cover of at least 10 times the distance between said two plates or covers, its contents cannot be observed as their perforations and the crucible are never forming one line, perpendicular to the plane formed by said bottom.

Abstract: An X-ray imaging cassette having a cover side and a tube side comprises, inbetween said cover and tube side, a radiation image storage phosphor plate and a tungsten filter foil having a thickness in the range from 0.10 to 0.60 mm, and, more preferably in the range from 0.10 to 0.30 mm, and is particularly useful in applications for radiotherapy.

Abstract: Crucibles having a bottom and surrounding side walls, provided with electrode clamps at exterior sites of side walls located opposite with respect to each other, wherein said sites are extending as lips at said side walls, and wherein said clamps are connectable with electrodes for heating said crucible, are improved in that a cross-section of each of said lips between between crucible wall and clamp is reduced with at least 5%.