METHOD FOR CALIBRATING THE MEASURING SYSTEM OF AN X-RAY APPARATUS

METHOD FOR CALIBRATING THE MEASURING SYSTEM OF AN X-RAY APPARATUS

In order to represent the bone structure of a patient's body, acquisitions are made with different irradiation energies. The irradiations are compared with these two energies in order to deduce a two-dimensional projected image which is representative of the bone structure alone. To this end, t...

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Bibliographische Detailangaben
Hauptverfasser: PICARD, CATHERINE, ROUGEE, ANNE, TROUSSET, YVES, SAINT-FELIX, DIDIER
Format: Patent
Sprache:eng
Schlagworte:
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
SURGERY
TESTING
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Beschreibung
Zusammenfassung:In order to represent the bone structure of a patient's body, acquisitions are made with different irradiation energies. The irradiations are compared with these two energies in order to deduce a two-dimensional projected image which is representative of the bone structure alone. To this end, there is assigned to each pixel in the projected images a value corresponding to the thickness of bone traversed by an x-ray which has terminated at said pixel. This value is obtained by calibrating the measuring system, detector cell by detector cell, so as to correct the spatial non-uniformities of the acquisition system.