1. A computer-implemented method of implant detection comprising: receiving a three-dimensional (3D) image of an anatomy portion of a patient from computed tomography (CT) projections of the patient in an image processing computing system; identifying a cluster of voxels forming an implant candidate on a CT slice of the 3D image; comparing the implant candidate with artifacts of implants from an implant database stored in a memory of the computing system; selecting a best-fit implant from the implant database; and overlaying a graphical image of the best-fit implant on the CT slice on a display of the computing system.