US 11,790,525 B2
Method for metal artifact avoidance in x-ray imaging
Jeffrey H. Siewerdsen, Baltimore, MD (US); Pengwei Wu, Baltimore, MD (US); Niral M. Sheth, Baltimore, MD (US); and Bjoern W. Kreher, Erlangen (DE)
Assigned to THE JOHNS HOPKINS UNIVERSITY, Baltimore, MD (US); and SIEMENS HEALTHCARE GMBH, Erlangen (DE)
Filed by THE JOHNS HOPKINS UNIVERSITY, Baltimore, MD (US); and Siemens Healthcare GmbH, Erlangen (DE)
Filed on Dec. 4, 2020, as Appl. No. 17/112,812.
Claims priority of provisional application 62/944,615, filed on Dec. 6, 2019.
Prior Publication US 2021/0174502 A1, Jun. 10, 2021
Int. Cl. G06T 7/00 (2017.01); A61B 6/12 (2006.01); A61B 6/00 (2006.01); G06T 7/70 (2017.01); G06T 11/00 (2006.01)
CPC G06T 7/0012 (2013.01) [A61B 6/12 (2013.01); A61B 6/4441 (2013.01); A61B 6/4447 (2013.01); A61B 6/5205 (2013.01); A61B 6/5258 (2013.01); G06T 7/70 (2017.01); G06T 11/005 (2013.01); G06T 11/006 (2013.01); G06T 2207/10081 (2013.01); G06T 2207/20084 (2013.01); G06T 2207/30004 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for metal artifact avoidance in 3D x-ray imaging, the method comprising:
determining a 3D location of metal in an object or volume of interest to be scanned;
estimating a source-detector orbit that will reduce severity of metal artifacts, wherein the source-detector orbit is a non-circular orbit that is defined by a tilt angle and a rotation angle of a gantry arm are varied during a scanning operation, wherein the estimating the source-detector orbit further comprises computing an objective function that is based on the 3D location of the metal that was determined, wherein the objective function describes a spectral shift that is associated with metal artifacts in 3D image reconstruction;
moving an imaging system to locations consistent with the source-detector orbit that was estimated or to locations close to the source-detector orbit that was estimated and within existing spatial constraints; and
scanning the object or the volume of interest according to the source-detector orbit.