Four-dimensional cardiac reconstruction from rotational x-ray sequences: first results for 4D coronary angiography

Eberhard Hansis; Hermann Schomberg; Klaus Erhard; Olaf Dössel; Michael Grass

doi:10.1117/12.811104

10 March 2009 Four-dimensional cardiac reconstruction from rotational x-ray sequences: first results for 4D coronary angiography

Eberhard Hansis, Hermann Schomberg, Klaus Erhard, Olaf Dössel, Michael Grass

Author Affiliations +

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72580B (2009) https://doi.org/10.1117/12.811104
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

The tomographic reconstruction of the beating heart requires dedicated methods. One possibility is gated reconstruction, where only data corresponding to a certain motion state are incorporated. Another one is motioncompensated reconstruction with a pre-computed motion vector field, which requires a preceding estimation of the motion. Here, results of a new approach are presented: simultaneous reconstruction of a three-dimensional object and its motion over time, yielding a fully four-dimensional representation. The object motion is modeled by a time-dependent elastic transformation. The reconstruction is carried out with an iterative gradient-descent algorithm which simultaneously optimizes the three-dimensional image and the motion parameters. The method was tested on a simulated rotational X-ray acquisition of a dynamic coronary artery phantom, acquired on a C-arm system with a slowly rotating C-arm. Accurate reconstruction of both absorption coefficient and motion could be achieved. First results from experiments on clinical rotational X-ray coronary angiography data are shown. The resulting reconstructions enable the analysis of both static properties, such as vessel geometry and cross-sectional areas, and dynamic properties, like magnitude, speed, and synchrony of motion during the cardiac cycle.

Citation Download Citation

Eberhard Hansis, Hermann Schomberg, Klaus Erhard, Olaf Dössel, and Michael Grass "Four-dimensional cardiac reconstruction from rotational x-ray sequences: first results for 4D coronary angiography", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72580B (10 March 2009); https://doi.org/10.1117/12.811104

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