Pincushion correction techniques and their effects on calculated 3D positions and imaging geometries

Kenneth R. Hoffmann; Yang Chen; Jacqueline Esthappan; Shiuh-Yung James Chen; John D. Carroll M.D.

doi:10.1117/12.237948

16 April 1996 Pincushion correction techniques and their effects on calculated 3D positions and imaging geometries

Kenneth R. Hoffmann, Yang Chen, Jacqueline Esthappan, Shiuh-Yung James Chen, John D. Carroll M.D.

Author Affiliations +

Proceedings Volume 2710, Medical Imaging 1996: Image Processing; (1996) https://doi.org/10.1117/12.237948
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

Two techniques for pincushion correction are evaluated based on their effect on calculation of the image geometry and 3D positions of object points. Images of a uniform wire mesh and a calibration phantom containing lead beads in its surface were acquired on the image intensifier TV systems in our catheterization labs. The radial mapping functions relating points in the original images and in the corrected images were determined using the mesh image. The undistorted mesh model was also used to determine and correct the distortions locally, i.e., for each square region between the mesh points. Thus, two corrected images were obtained. Images of the calibration phantom before and after correction were analyzed to determine the 3D position of the lead beads and the imaging geometry, using a calibration algorithm and the enhanced Metz-Fencil technique. In comparing the 3D positions calculated from the radially corrected and locally corrected images, the calculated 3D positions using the calibration technique vary by less than 0.6 mm in the x and y direction and less than 5.0 mm in the z direction. The uncorrected data yields differences of over 1 cm in the z direction. The 3D positions calculated using the enhanced Metz-Fencil technique appear to be more accurate when pincushion correction is applied.

Citation Download Citation

Kenneth R. Hoffmann, Yang Chen, Jacqueline Esthappan, Shiuh-Yung James Chen, and John D. Carroll M.D. "Pincushion correction techniques and their effects on calculated 3D positions and imaging geometries", Proc. SPIE 2710, Medical Imaging 1996: Image Processing, (16 April 1996); https://doi.org/10.1117/12.237948

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