scholarly journals Image reconstruction by conditional entropy maximisation for PET system

2004 ◽  
Vol 151 (5) ◽  
pp. 345 ◽  
Author(s):  
P.P. Mondal ◽  
K. Rajan
Keyword(s):  
Image Reconstruction ◽  
Conditional Entropy ◽  
Pet System ◽  
Entropy Maximisation

On curvelet CS reconstructed MR images and GA-based fuzzy conditional entropy maximization for segmentation

2019 ◽  
Vol 17 (01) ◽  
pp. 1950003
Author(s):  
Apurba Roy ◽  
Santi P. Maity
Keyword(s):  
Image Reconstruction ◽  
Linear Prediction ◽  
Random Noise ◽  
Curvelet Transform ◽  
Conditional Entropy ◽  
Mr Images ◽  
Recursive Filtering ◽  
Entropy Maximization ◽  
Residual Noise ◽  
Incomplete Measurement

In many practical situations, magnetic resonance imaging (MRI) needs reconstruction of images at low measurements, far below the Nyquist rate, as sensing process may be very costly and slow enough so that one can measure the coefficients only a few times. Segmentation of such subsampled reconstructed MR images for medical analysis and diagnosis becomes a challenging task due to the inherent complex characteristics of the MR images. This paper considers reconstruction of MR images at compressive sampling (or compressed sensing (CS)) paradigm followed by its segmentation in an integrated platform. Image reconstruction is done from incomplete measurement space with random noise injection iteratively. A weighted linear prediction is done for the unobserved space followed by spatial domain denoising through adaptive recursive filtering. The reconstructed images, however, suffer from imprecise and/or missing edges, boundaries, lines, curvatures etc. and residual noise. Curvelet transform (CT) is purposely used for removal of noise and for edge enhancement through hard thresholding and suppression of approximate subbands, respectively. Then a fuzzy entropy-based clustering, using genetic algorithms (GAs), is done for segmentation of sharpen MR Image. Extensive simulation results are shown to highlight performance improvement of both image reconstruction and segmentation of the reconstructed images along with relative gain over the existing works.

Conditional entropy maximization for PET image reconstruction using adaptive mesh model

2007 ◽  
Vol 31 (3) ◽  
pp. 166-177 ◽  
Author(s):  
Hongqing Zhu ◽  
Huazhong Shu ◽  
Jian Zhou ◽  
Xiubin Dai ◽  
Limin Luo
Keyword(s):  
Image Reconstruction ◽  
Conditional Entropy ◽  
Adaptive Mesh ◽  
Entropy Maximization ◽  
Mesh Model ◽  
Pet Image Reconstruction

Ultrafast image reconstruction of a dual-head PET system by use of CUDA architecture

2011 ◽  
Author(s):  
YuKai Hung ◽  
Yun Dong ◽  
Felix R. Chern ◽  
Weichung Wang ◽  
Chien-Min Kao ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Cuda Architecture ◽  
Pet System

Image reconstruction algorithms for a novel PET system with a half-ring insert

2006 ◽  
Author(s):  
Debashish Pal ◽  
Yuan-Chuan Tai ◽  
Martin Janecek ◽  
Heyu Wu ◽  
Joseph A. O'Sullivan
Keyword(s):  
Image Reconstruction ◽  
Reconstruction Algorithms ◽  
Pet System ◽  
Image Reconstruction Algorithms

scholarly journals High resolution image reconstruction method for a double-plane PET system with changeable spacing

2016 ◽  
Vol 40 (5) ◽  
pp. 058201 ◽  
Author(s):  
Xiao-Yue Gu ◽  
Wei Zhou ◽  
Lin Li ◽  
Long Wei ◽  
Peng-Fei Yin ◽  
...  
Keyword(s):  
High Resolution ◽  
Image Reconstruction ◽  
Reconstruction Method ◽  
Resolution Image ◽  
High Resolution Image ◽  
Image Reconstruction Method ◽  
Double Plane ◽  
Pet System

Image reconstruction for a 3D PET system using a minimum norm constraint

1991 ◽  
Vol 36 (1) ◽  
pp. 35-46 ◽  
Author(s):  
M J Hogan ◽  
P J Harvey ◽  
D C Howse ◽  
B T A McKee
Keyword(s):  
Image Reconstruction ◽  
Minimum Norm ◽  
Norm Constraint ◽  
Pet System ◽  
3D Pet

Evaluation of quantitative, efficient image reconstruction for VersaPET, a compact PET system

2020 ◽  
Vol 47 (7) ◽  
pp. 2852-2868
Author(s):  
Shouyi Wei ◽  
Paul Vaska
Keyword(s):  
Image Reconstruction ◽  
Pet System

Time-of-flight image reconstruction with TV minimization constraint for a dual-head small animal PET system

2012 ◽  
Author(s):  
Hung-Yi Chou ◽  
Chung-Yung Tsai ◽  
Chien-Min Kao ◽  
Chin-Tu Chen ◽  
Cheng-Ying Chou
Keyword(s):  
Image Reconstruction ◽  
Time Of Flight ◽  
Small Animal ◽  
Small Animal Pet ◽  
Animal Pet ◽  
Pet System
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