Paper Info
Title
Theoretical framework for filtered back projection in tomosynthesis
Abstract
Tomosynthesis provides only incomplete 3D-data of the imaged object. Therefore it is important for reconstruction tasks to take all available information carefully into account. We are focusing on geometrical aspects of the scan process which can be incorporated into reconstruction algorithms by filtered backprojection methods. Our goal is a systematic approach to filter design. A unified theory of tomosynthesis is derived in the context of linear system theory, and a general four-step filter design concept is presented. Since the effects of filtering are understandable in this context, a methodical formulation of filter functions is possible in order to optimize image quality regarding the specific requirements of any application. By variation of filter parameters the slice thickness and the spatial resolution can easily be adjusted. The proposed general concept of filter design is exemplarily discussed for circular scanning but is valid for any specific scan geometry. The inherent limitations of tomosynthesis are pointed out and strategies for reducing the effects of incomplete sampling are developed. Results of a dental application show a striking improvement in image quality.
Year
DOI
Venue
1998
10.1117/12.310839
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
Keywords
Field
DocType
reconstruction,3D-imaging,limited angle tomography,tomosynthesis,filtered backprojection,ectomography,transfer function,dentistry,filter design,classical tomography
Computer vision,Tomosynthesis,Linear system,Filter (signal processing),Image quality,Sampling (statistics),Artificial intelligence,Image resolution,Radon transform,Mathematics,Filter design
Conference
Volume
ISSN
Citations 
3338
0277-786X
13
PageRank 
References 
Authors
2.13
0
2
Name
Order
Citations
PageRank
guenter lauritsch1172.57
W Haerer2183.17