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1. (WO2007031898) DIRECT MEASURING AND CORRECTION OF SCATTER FOR CT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/031898 International Application No.: PCT/IB2006/053054
Publication Date: 22.03.2007 International Filing Date: 01.09.2006
IPC:
A61B 6/00 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
6
Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
Applicants:
PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH [DE/DE]; Lübeckertordamm 5 20099 Hamburg, DE (DE)
KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BW, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, CZ, DK, DM, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HN, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SI, SK, SL, SM, SN, SV, SY, SZ, TD, TG, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, ZA, ZM, ZW)
PROKSA, Roland [DE/DE]; DE (UsOnly)
Inventors:
PROKSA, Roland; DE
Agent:
VOLMER, Georg; Philips Intellectual Property & Standards GmbH Weisshausstr. 2 52066 Aachen, DE
Priority Data:
05108406.913.09.2005EP
Title (EN) DIRECT MEASURING AND CORRECTION OF SCATTER FOR CT
(FR) MESURE ET CORRECTION DIRECTES DE DISPERSION POUR TOMOGRAPHIE PAR ORDINATEUR
Abstract:
(EN) Cone-beam CT scanners with large detector arrays suffer from increased scatter radiation. This radiation may cause severe image artefacts. An examination apparatus is provided which directly measures the scatter radiation and uses this measurement for a correction of the contaminated image data. The measurement is performed by utilizing a 1- dimensional anti-scatter-grid and an X-ray tube with an electronic focal spot movement. Image data is detected at a first position of a focal spot and scatter data is detected at a second position of the focal spot. The image data is corrected on the basis of the scatter data.
(FR) Les scanners de tomographie par ordinateur (CT) à faisceau conique présentant des groupes élevés de détecteur sont soumis à une dispersion de rayonnement accrue. Ce rayonnement peut provoquer des artéfacts graves dans l'image. Selon un mode de réalisation de l'invention, un dispositif d'examen mesure directement le rayonnement dispersé et utilise cette mesure pour corriger les données d'image contaminées. Cette mesure peut être exécutée au moyen d'un réseau antidispersion unidimensionnel et d'un tube à rayons X pourvu d'un déplacement électronique de point focal.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP1926431JP2009507544US20080226020CN101262819