DocumentCode :
1057783
Title :
Directional View Interpolation for Compensation of Sparse Angular Sampling in Cone-Beam CT
Author :
Bertram, Matthias ; Wiegert, Jens ; Schäfer, Dirk ; Aach, Til ; Rose, Georg
Author_Institution :
Philips Res. Eur.-Aachen, Aachen
Volume :
28
Issue :
7
fYear :
2009
fDate :
7/1/2009 12:00:00 AM
Firstpage :
1011
Lastpage :
1022
Abstract :
In flat detector cone-beam computed tomography and related applications, sparse angular sampling frequently leads to characteristic streak artifacts. To overcome this problem, it has been suggested to generate additional views by means of interpolation. The practicality of this approach is investigated in combination with a dedicated method for angular interpolation of 3-D sinogram data. For this purpose, a novel dedicated shape-driven directional interpolation algorithm based on a structure tensor approach is developed. Quantitative evaluation shows that this method clearly outperforms conventional scene-based interpolation schemes. Furthermore, the image quality trade-offs associated with the use of interpolated intermediate views are systematically evaluated for simulated and clinical cone-beam computed tomography data sets of the human head. It is found that utilization of directionally interpolated views significantly reduces streak artifacts and noise, at the expense of small introduced image blur.
Keywords :
computerised tomography; diagnostic radiography; image reconstruction; image sampling; interpolation; medical image processing; 3D sinogram data; computed tomography; cone-beam CT; image blur; image quality; image reconstruction; shape-driven directional interpolation algorithm; sparse angular sampling compensation; streak artifact reduction; Computational modeling; Computed tomography; Detectors; Head; Humans; Image quality; Interpolation; Noise reduction; Sampling methods; Tensile stress; Aliasing; computed tomography (CT); image quality; interpolation; reconstruction; Algorithms; Artifacts; Computer Simulation; Cone-Beam Computed Tomography; Head; Humans; Image Processing, Computer-Assisted; Imaging, Three-Dimensional; Phantoms, Imaging;
fLanguage :
English
Journal_Title :
Medical Imaging, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0062
Type :
jour
DOI :
10.1109/TMI.2008.2011550
Filename :
4738374
Link To Document :
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