Computer simulation of FDK reconstruction with the in-line holographic projection data

Weixing Cai; Ruola Ning; Dong Yang

doi:10.1117/12.655606

2 March 2006 Computer simulation of FDK reconstruction with the in-line holographic projection data

Weixing Cai, Ruola Ning, Dong Yang

Author Affiliations +

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 61424G (2006) https://doi.org/10.1117/12.655606
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Phase-contrast imaging uses the phase coefficient rather than the attenuation coefficient alone to image objects. Consequently, it may resolve some structures that have similar attenuation coefficients but different phase coefficients as their surroundings. Phase contrast imaging is also an edge-enhanced imaging technique. With this method, the boundary of inside small structures could be easily determined. In this paper, the possibility of incorporating the phase contrast in-line method into the current cone beam CT (CBCT) system was explored. Starting from the interference formula of in-line holography, some mathematical assumptions were made and thus, the terms in the interference formula could be approximately expressed as a line integral that is the requirement for all CBCT algorithms. So, the CBCT reconstruction algorithms, such as the FDK algorithm could be applied for the in-line holographic projections, with some mathematical imperfection. A point x-ray source and a high-resolution detector were assumed for computer simulation. The reconstructions for cone-beam CT imaging were studied. The results showed that all the lesions in the numerical phantom could be observed with an enhanced edge. However, due to the edge-enhancement nature of the inline holographic projection, the reconstructed images had obvious streak artifacts and numerical errors. The image quality could be improved by using a hamming window during the filtering process. In the presence of noise, the reconstructions from the in-line holographic projections showed clearer edges than the normal CT reconstructions did. Finally it was qualitatively illustrated that small cone angle and weak attenuation were preferred in this method.

Citation Download Citation

Weixing Cai, Ruola Ning, and Dong Yang "Computer simulation of FDK reconstruction with the in-line holographic projection data", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61424G (2 March 2006); https://doi.org/10.1117/12.655606

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Signal attenuation

Holography

X-rays

Sensors

Reconstruction algorithms

3D image reconstruction

Computer simulations

Show All Keywords

Keywords/Phrases

Search In:

Publication Years