A transmission-target x-ray tube can include an x-ray window 12 mounted on a window-housing 13. The window-housing 13 can be made of a high density material with a high atomic number, and can include an aperture 13.sub.a with an increasing-inner-diameter region 23 for blocking x-rays and electrons.

A magnetic assembly for focusing an electron beam includes one or more quadrupole assemblies, each quadrupole assembly having at least a pair of separate opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member. An X-ray tube includes a magnetic assembly for focusing an electron beam extending from a cathode to an anode of the X-ray tube, the magnetic assembly comprising one or more quadrupole assemblies, each quadrupole assembly having at least a pair of opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member.

A magnetic assembly for focusing an electron beam includes one or more quadrupole assemblies, each quadrupole assembly having at least a pair of separate opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member. An X-ray tube includes a magnetic assembly for focusing an electron beam extending from a cathode to an anode of the X-ray tube, the magnetic assembly comprising one or more quadrupole assemblies, each quadrupole assembly having at least a pair of opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member.

A portable XRF analyzer includes a hand shield to substantially block x-rays from impinging on a hand of a user. The portable XRF analyzer includes a heat sink over an x-ray source and a heat sink over an x-ray detector. The heat sinks are separated from each other by a thermally insulative material.

A guide device for at least one line, such as an electric line of a C-arm, has a rotatable first cylinder with a first cylindrical surface and a static second cylinder, adjoining the first cylinder in the axial direction and having a second cylindrical surface. A first guide element for guiding the line on the first and/or the second cylindrical surface, is disposed coaxially with respect to the first and the second cylinder and it is movable relative to the first and the second cylinder. The line can be wound up on the first and/or the second cylindrical surface or can be unwound therefrom depending on the movement of the first cylinder.

A guide device for at least one line, such as an electric line of a C-arm, has a rotatable first cylinder with a first cylindrical surface and a static second cylinder, adjoining the first cylinder in the axial direction and having a second cylindrical surface. A first guide element for guiding the line on the first and/or the second cylindrical surface, is disposed coaxially with respect to the first and the second cylinder and it is movable relative to the first and the second cylinder. The line can be wound up on the first and/or the second cylindrical surface or can be unwound therefrom depending on the movement of the first cylinder.

A mammography apparatus is provided for detecting malignant cells in a breast, comprising an x-ray source and an x-ray detector that cooperates with the x-ray source for providing an x-ray image of said breast, and further comprising a paddle for flattening the breast by pressing it against said x-ray detector, and comprising a contact area measuring device for measuring a contact area between the breast and the paddle, wherein the contact area measuring device is embodied with at least a first laminate of an electrically insulating material and an electrically low resistance material, which first laminate is provided on a side of the paddle facing the breast, and wherein the electrically low resistance material is sandwiched between the paddle and the insulating material.

A mammography apparatus is provided for detecting malignant cells in a breast, comprising an x-ray source and an x-ray detector that cooperates with the x-ray source for providing an x-ray image of said breast, and further comprising a paddle for flattening the breast by pressing it against said x-ray detector, and comprising a contact area measuring device for measuring a contact area between the breast and the paddle, wherein the contact area measuring device is embodied with at least a first laminate of an electrically insulating material and an electrically low resistance material, which first laminate is provided on a side of the paddle facing the breast, and wherein the electrically low resistance material is sandwiched between the paddle and the insulating material.

A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

A system for protecting cables and lines is provided. The system includes a telescopic C-arm and a cable carrier. The telescopic C-arm includes an outer C-arm, an inner C-arm, an outer carriage, and an inner carriage. The outer C-arm, on an outer surface of the outer C-arm, is arranged in a displaceable manner along the outer carriage. The inner C-arm, on an outer surface of the inner C-arm, is arranged in a fixed or displaceable manner on the inner carriage. The inner carriage is arranged in a displaceable manner along an inner surface of the outer C-arm. The cable carrier connects the outer carriage and the inner carriage. The cable carrier accommodates the cables and the lines and is configured to move freely between the outer C-arm and the inner C-arm.