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EP0028036A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process and arrangement for examining a body by means of penetrating rays

Assignee: Philips Intellectual Property and Standards GmbH
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Filing: 1980-09-18
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Granted: —
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Expires: 2000-09-18
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Abstract

Abstract Translated from German Geräte, die die Elektronendichte in einem Körper anhand der Streustrahlung messen, die in einem den Körper durchsetzenden scharf gebündelten Strahl erzeugt wird, liefern bei der Rekonstruktion der Dichteverteilung fehlerhafte Bilder aufgrund mehrfach gestreuter Strahlung. Diese lässt sich zwar durch Streustrahlenblenden verringern, aber nicht ganz beseitigen. Die Erfindung sieht daher vor, die Grösse des Streustrahlenanteils durch Messung zu erfassen. Zu diesem Zweck wird die Detektoranordnung, die die Einfach-Streustrahlung misst, zumindest zeitweise gegen die Einfach-Streustrahlung abgeschirmt und die von den abgeschirmten Elementen gemessenen Werte werden zur Korrektur der bei der Messung der Einfach-Streustrahlung erzeugten Messwerte herangezogen. Devices that measure the electron density in a body on the basis of the scattered radiation which is generated in a sharply focused beam passing through the body provide defective images due to multiple scattered radiation when reconstructing the density distribution. Although this can be reduced by means of anti-scatter diaphragms, it cannot be eliminated entirely. The invention therefore provides for the size of the scattered radiation component to be determined by measurement. For this purpose, the detector arrangement, which measures the single scattered radiation, is at least temporarily shielded from the simple scattered radiation and the values measured by the shielded elements are used to correct the measurement values generated during the measurement of the single scattered radiation.

Inventors

  • 👤 Geoffrey Dr. Harding
  • 👤 Wolfgang Wagner

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 07:22
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/48; A61B6/483; A61B6/02

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

FR1561351A Cited
DE2604020B2 Cited
DE2720759A1 Cited
FR2386055A1 Cited
DE2828240A1 Cited
FR2441855A1 Cited

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