A Spatial-Stiffness Analysis of Fiducial Registration Accuracy
نویسندگان
چکیده
We describe a new approach to predicting the maximum target registration error for fiducial registration. The approach is based on the analysis of a spatial stiffness model that produces an analytic expression of the maximum error that is closely related to the formula reported in Fitzpatrick et al.[1]. The methodology we used was developed by Lin et al. [4]. The analytic stiffness results yield error estimates that closely match those from numerical simulations.
منابع مشابه
Analytic Expressions for Fiducial and Surface Target Registration Error
We propose and test analytic equations for approximating expected fiducial and surface target registration error (TRE). The equations are derived from a spatial stiffness model of registration. The fiducial TRE equation is equivalent to one presented by. We believe that the surface TRE equation is novel, and we provide evidence from computer simulations to support the accuracy of the approximat...
متن کاملSpatial-Stiffness Analysis of Surface-Based Registration
We have developed a new approach for preoperative selection of points from a surface model for rigid shape-based registration. This approach is based on an extension of our earlier spatial-stiffness model of fiducial registration. We compared our approach with the maximization of the noise-amplification index (NAI), using target registration accuracy (TRE) as our comparison measure, on models d...
متن کاملA Framework for Semi-automatic Fiducial Localization in Volumetric Images
Fiducial localization in volumetric images is a common task performed by image-guided navigation and augmented reality systems. These systems often rely on fiducials for image-space to physical-space registration, or as easily identifiable structures for registration validation purposes. Automated methods for fiducial localization in volumetric images are available. Unfortunately, these methods...
متن کاملError prediction for probes guided by means of fixtures
Probe guides are surgical fixtures that are rigidly attached to bone anchors in order to place a probe at a target with high accuracy (RMS error < 1 mm). Applications include needle biopsy, the placement of electrodes for deep-brain stimulation (DBS), spine surgery, and cochlear implant surgery. Targeting is based on pre-operative images, but targeting errors can arise from three sources: (1) a...
متن کاملFiducial registration error and target registration error are uncorrelated [7261-1]
Image-guidance systems based on fiducial registration typically display some measure of registration accuracy based on the goodness of fit of the fiducials. A common measure is fiducial registration error (FRE), which equals the root-meansquare error in fiducial alignment between image space and physical space. It is natural for the surgeon to regard the displayed estimate of error as an indica...
متن کامل