Estimation of accuracy in localizing externally attached markers in multimodal volume head images

Calvin R. Maurer Jr.; Jennifer J. McCrory; J. Michael Fitzpatrick

doi:10.1117/12.154535

14 September 1993 Estimation of accuracy in localizing externally attached markers in multimodal volume head images

Calvin R. Maurer Jr., Jennifer J. McCrory, J. Michael Fitzpatrick

Proceedings Volume 1898, Medical Imaging 1993: Image Processing; (1993) https://doi.org/10.1117/12.154535
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

Abstract

We recently examined the registration of multimodal volume head images using extrinsic markers. We analyzed the problem into the three separate problems of finding the positions of at least three non-collinear markers in the two images, matching corresponding markers in the two image spaces, and estimating the translation and rotation parameters of the rigid body transformation that maps one space into the other. We call the calculation of the geometric centers fiducial localization. Knowing the fiducial localization error is important since it is an important determinant of target registration error, and because it provides a useful way to compare localization algorithms. In the present work we present a technique for experimentally estimating the error associated with localizing a fiducial in a tomographic image. Our method involves acquiring a volume image of a large number of markers with precisely known positions in the physical space of a phantom containing the markers, localizing the fiducials in the image, and registering the localized fiducial positions in image space to the precisely known positions in physical space. Fiducial localization error is estimated from the fiducial registration error, i.e. the distance between corresponding fiducial positions after registration.

Citation Download Citation

Calvin R. Maurer Jr., Jennifer J. McCrory, and J. Michael Fitzpatrick "Estimation of accuracy in localizing externally attached markers in multimodal volume head images", Proc. SPIE 1898, Medical Imaging 1993: Image Processing, (14 September 1993); https://doi.org/10.1117/12.154535

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available