scholarly journals Fan beam and parallel beam projection and back-projection operators

1977 ◽  
Author(s):  
G.T. Gullberg
Keyword(s):  
Projection Operators ◽  
Back Projection ◽  
Parallel Beam ◽  
Beam Projection

Videographic tomography. I. Reconstruction with parallel-beam projection data

1990 ◽  
Vol 9 (4) ◽  
pp. 366-375 ◽  
Author(s):  
A.F. Gmitro ◽  
V. Tresp ◽  
G.R. Gindi
Keyword(s):  
Projection Data ◽  
Parallel Beam ◽  
Beam Projection

A novel extension of the parallel-beam projection-slice theorem to divergent fan-beam and cone-beam projections

2005 ◽  
Vol 32 (3) ◽  
pp. 654-665 ◽  
Author(s):  
Guang-Hong Chen ◽  
Shuai Leng ◽  
Charles A. Mistretta
Keyword(s):  
Cone Beam ◽  
Parallel Beam ◽  
Slice Theorem ◽  
Beam Projection

Enlarge the Field of View of Nano CT in Synchrotron Radiation

2013 ◽  
Vol 380-384 ◽  
pp. 1808-1811
Author(s):  
Ren Bo Tan ◽  
Jian Fu ◽  
Li Yuan Chen
Keyword(s):  
Synchrotron Radiation ◽  
High Spatial Resolution ◽  
Processing Method ◽  
Field Of View ◽  
Filter Back Projection ◽  
Back Projection ◽  
Parallel Beam ◽  
X Ray ◽  
Radiation Imaging ◽  
Data Processing Method

nanoCT with synchrotron radiation has a high spatial resolution up to nanoscale which provides an approach to the 3D inter-structure of sample of tiny size in the research of biology, materials and so on. However, due to the high resolution it provide, the field of view is limited to only about 15~60μm. In order to improve the scale of field of view, we discussed a new scan mode called half-scan which is using the symmetry of parallel-beam x-ray and newly applied in the synchrotron radiation imaging field. In this paper, we deduced the data processing method which is consisted of data preprocessing and filter back projection (FBP) algorithm. Numerical simulation and analysis demonstrate that the field of view can be enlarged up to 100% with this method.

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