Real-Time Distortion Correction Of Digital X-Ray II/TV Systems: An Application Example

P. Haaker; E. Klotz; R. Koppe; R. Linde

doi:10.1117/12.950292

2 March 1989 Real-Time Distortion Correction Of Digital X-Ray II/TV Systems: An Application Example

P. Haaker, E. Klotz, R. Koppe, R. Linde

Proceedings Volume 1027, Image Processing II; (1989) https://doi.org/10.1117/12.950292
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

In X-ray image intensifier (II)/TV-camera systems geometric distortions occur, e.g. due to the curved input screen of the II. For methods which are based on a pixelwise comparison of images, e.g. digital angiotomosynthesis, an accurate correction of these geometric distortions is absolutely necessary. For the application of tomosynthesis to coronary angiography the correction in addition has to be done in real-time, because the recon-struction of the three dimensional structure of the blood vessels has to be done while the patient is undergoing catheterization. This paper describes a digital correction unit which allows a large variety of geome-tric distortions to be corrected. It consists of an input memory for storing the distorted image, an output memory for storing the corrected image and a special address memory which will serve as an address table during the correction step. For each element of the output image the location of the corresponding element of the distorted input image is determined in a preprocessing step and stored in the address memory. The actual correction of an image is then done while the image is copied from the input into the output memory. In this way 512x512 images can be corrected in real-time by a 32-bit 68020-based micro-processor system.

Citation Download Citation

P. Haaker, E. Klotz, R. Koppe, and R. Linde "Real-Time Distortion Correction Of Digital X-Ray II/TV Systems: An Application Example", Proc. SPIE 1027, Image Processing II, (2 March 1989); https://doi.org/10.1117/12.950292

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