Derivation of expected registration error for point-based rigid-body registration

J. Michael Fitzpatrick; Jay B. West; Calvin R. Maurer Jr.

doi:10.1117/12.310824

24 June 1998 Derivation of expected registration error for point-based rigid-body registration

J. Michael Fitzpatrick, Jay B. West, Calvin R. Maurer Jr.

Proceedings Volume 3338, Medical Imaging 1998: Image Processing; (1998) https://doi.org/10.1117/12.310824
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

This paper presents two new expressions for estimating registration accuracy in point-based rigid-body registration and points out a danger in using the traditional measure of registration accuracy. In this work we present two major results: we first derive an approximate expression for (TRE²), and we then use this to calculate the expected squared alignment error for individual fiducials. This leads to a surprising conclusion--the registration accuracy is generally worst near the fiducials which are most closely aligned. This should demonstrate the danger of relying on the traditional accuracy measure, namely fiducial registration error, to judge the quality of a registration.

Citation Download Citation

J. Michael Fitzpatrick, Jay B. West, and Calvin R. Maurer Jr. "Derivation of expected registration error for point-based rigid-body registration", Proc. SPIE 3338, Medical Imaging 1998: Image Processing, (24 June 1998); https://doi.org/10.1117/12.310824

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