Abstract: The invention relates to a test body for checking the transmission properties of volume tomographs, in particular radiological tomographs, which comprises several plates (2) that are connected to form a stack, in which adjacent plates (2) contact each other and said body comprises spheres (4) made of at least one material that is different from the plates (2) and having different diameters, wherein the respective spheres (4) are arranged in and/or between at least some of the plates (2), and wherein on/in the test body, preferably in the stack, at least one rod-shaped hollow profile, in particular at least one pipe having a circular cross section, is arranged. The invention further relates to a method for checking the transmission properties of a tomograph using such a test body (1).

Abstract: A scalpel, in particular for ophthalmologic applications, having a handle head and a blade, wherein the blade, which includes a blade shank and a blade face, is inserted into a handle head of the handle, and at least one cutting edge is formed on the blade face, wherein the blade shank is configured together with the blade face as a body on which a continuous smooth rear surface is formed, whereby the front of the body opposite from the rear surface forms a cylindrical surface in the area of the blade shank and forms the top of the blade in the area of the blade face, and the end of the handle head has two surfaces that are slanted with respect to each other and that abut, like a roof edge, in an edge that is perpendicular to the axis of the handle, and whereby, in a first of the slanted surfaces, there is an opening for inserting the blade, whereby the inserted blade comes to lie in the opening in such a way that the smooth rear surface is flush with the first slanted surface.