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1. (WO2017035517) METHODS AND SYSTEMS FOR IMAGE ARTIFACTS REDUCTION
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Pub. No.: WO/2017/035517 International Application No.: PCT/US2016/049148
Publication Date: 02.03.2017 International Filing Date: 26.08.2016
IPC:
A61B 6/00 (2006.01) ,A61B 6/03 (2006.01) ,A61B 8/00 (2006.01) ,A61B 8/14 (2006.01) ,G01N 23/00 (2006.01) ,G01N 23/04 (2006.01) ,G01T 1/161 (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
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
02
Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
03
Computerised tomographs
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
8
Diagnosis using ultrasonic, sonic or infrasonic waves
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
8
Diagnosis using ultrasonic, sonic or infrasonic waves
13
Tomography
14
Echo-tomography
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
02
by transmitting the radiation through the material
04
and forming a picture
G PHYSICS
01
MEASURING; TESTING
T
MEASUREMENT OF NUCLEAR OR X-RADIATION
1
Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16
Measuring radiation intensity
161
Applications in the field of nuclear medicine, e.g. in vivo counting
Applicants:
VARIAN MEDICAL SYSTEMS INTERNATIONAL AG [CH/US]; 3100 Hansen Way Palo Alto, California 94304, US
Inventors:
PAYSAN, Pascal; CH
MELO DE CARVALHO, Luis; CH
SEGHERS, Dieter; CH
BREHM, Marcus; CH
Agent:
SU, Gene; TW
Priority Data:
14/838,35227.08.2015US
Title (EN) METHODS AND SYSTEMS FOR IMAGE ARTIFACTS REDUCTION
(FR) PROCÉDÉS ET SYSTÈMES POUR LA RÉDUCTION D'ARTEFACTS D'IMAGE
Abstract:
(EN) One example method to reduce image artifacts may include obtaining measured projection data acquired using an imaging system. The measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system. The method may also include generating virtual projection data associated with the artifact source by forward projecting a model representing one or more physical properties of the artifact source. The method may further include generating corrected projection data based on the measured projection data and the virtual projection data; and reconstructing the corrected projection data into reconstructed volume image data to reduce image artifacts caused by the artifact source.
(FR) Un procédé donné à titre d'exemple pour réduire des artéfacts d'image peut comprendre l'obtention de données de projection mesurées acquises à l'aide d'un système d'imagerie. Les données de projection mesurées sont associées à un objet cible et à une source d'artefacts dans un champ de rayonnement du système d'imagerie. Le procédé peut également consister à générer des données de projection virtuelles associées à la source d'artefacts par la projection vers l'avant d'un modèle représentant une ou plusieurs propriétés physiques de la source d'artefacts. Le procédé peut en outre consister à générer des données de projection corrigées sur base des données de projection mesurées et des données de projection virtuelles ; et à reconstruire les données de projection corrigées en données d'image volumique reconstruites afin de réduire les artéfacts d'image provoqués par la source d'artefacts.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, 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, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)