U.S. Philips Corporation

Koninklijke Philips Corporation N.v.

Petrus W J Linders

Menno W J Prins

Johannes Cornelis Jans

Johannes Wilhelmus Weekamp

Rudolph M Snoeren

Jacobus Bernardus Giesbers

Hendrik Jan Meulenbrugge

Edward W A Young

Andreas C M Van Nes

Alexander H W Van Eeuwijk

Christianus G L M Nederpelt

The invention relates to a method of manufacturing honeycomb structures in which multiple foils are welded together by means of thermal compression and the multiple foils form the honeycomb structure in the expanded condition. The bonding locations, where the foils are fused together, are defined by inserting a structured layer between the foils.

Honeycomb structure and method of manufacturing honeycomb structures

The invention relates to a method of manufacturing honeycomb stuctures in which multiple foils are welded together by means of thermal compression and the multiple foils form the honeycomb structure in the expanded condition. The bonding locations, where the foils are fused together, are defined by inserting a structured separating layer between the foils. The invention also relates to, for example, luminaries and x-ray apparatus using a honeycomb structure so manufactured.

An X-ray examination apparatus includes an X-ray detector for deriving an image signal from an X-ray image. The X-ray detector has an essentially elongate X-ray-sensitive surface. The X-ray sensitive surface of the X-ray detector corresponds notably to a relevant part of the object to be examined.

X-ray examination apparatus

An X-ray examination apparatus includes an X-ray source (,) for emitting an X-ray beam, an X-ray detector (,) for detecting an X-ray image and converting it into an optical image, and a video extractor (,) which is coupled to the X-ray detector (,) via optical coupling means (,). The optical coupling means (,) is provided with an optical pick up (,) for feeding a fraction of the light flux to a photosensor (,) which produces a control signal for adjusting the X-ray flux from the X-ray source (,). The photosensor (,) is provided with an array of pixels, with weighting means for the signals detected in or by each of said pixels, and with means for determining a mean value of the detected and weighted signals, yielding a control signal which is fed back in order to adjust the X-ray flux from the X-ray source (,).

X-ray examination apparatus including a control loop for adjusting the X-ray flux

The X-ray examination apparatus includes an X-ray source, an X-ray detector and an X-ray filter which is located between the X-ray source and the X-ray detector. The X-ray filter includes elements, notably capillary tubes, and the X-ray absorptivity of separate filter elements is adjustable by adjustment of a quantity of X-ray absorbing liquid in the respective filter elements. The quantity of X-ray absorbing liquid in the individual filter elements is adjusted by way of electric voltages applied to the individual filter elements. A control system is provided to apply the electric voltages selectively to the individual filter elements. The control system includes voltage lines and switching elements which electrically couple the filter elements to an electric voltage source. The filter elements are formed by spaces between corrugated plates or parallel plates provided with separating members, such as protrusions which extend transversely of the plates. The voltage lines are disposed on the plates. Preferably, the plates are formed from a stack of extendable wall foils and separating foils are provided partially between the wall foils so as to adapt the spacing of the voltage lines to the spacing of the switching elements.

X-ray examination apparatus including an X-ray filter

A method for forming an assembled image from successive sub-images comprises the step of acquiring the sub-images, notably X-ray images, with an X-ray detector comprising an essentially flat X-ray-sensitive surface. An X-ray examination apparatus comprises an X-ray detector having a flat X-ray sensitive surface. Advantageously, difference images are derived from successive sub-images. For example, the assembled image derived from the difference images is used to display blood flow patterns in a patient's vascular system.

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Eindhoven, Netherlands

Petrus W J Linders