Keyphrases
Positron Emission Tomography
100%
Multigrid
100%
Reconstruction Algorithm
100%
Expectation-maximization Algorithm
100%
Expectation Maximization
100%
Transition Criteria
100%
Fine Grid
60%
Grid Level
50%
Gray Level
40%
Histogram
30%
Low-frequency Component
30%
Reconstructed Image
20%
Root Mean Square Error
20%
High-frequency Component
20%
Level Transition
20%
Occurrence Data
20%
Difference Histogram
20%
Displacement Vector
20%
Angular Second Moment
20%
Convergence Rate
10%
Spatial Distribution
10%
Algorithm Method
10%
Feature Extracting
10%
Local Area
10%
Spatial Dependence
10%
Maximum Likelihood Method
10%
Fast Convergence
10%
Coarse Grid
10%
Number of Iterations
10%
Frequency Image
10%
Co-occurrence Matrix
10%
CPU Time
10%
Image Components
10%
Level Dependence
10%
Inverse Difference Moment
10%
Computer Science
reconstruction algorithm
100%
Frequency Component
100%
Transition Criterion
100%
Reconstructed Image
60%
Difference Histogram
40%
Displacement Vector
40%
Root Mean Squared Error
40%
Convergence Rate
20%
maximum-likelihood
20%
Extracted Feature
20%
Fast Convergence
20%
Image Frequency
20%
Occurrence Matrix
20%
Spatial Distribution
20%
Stop Iterating
20%
Mathematics
reconstruction algorithm
100%
Expectation-Maximization Algorithm
100%
Positron
100%
Statistics
90%
Histogram
50%
Gray Level
40%
Variance
30%
Reconstructed Image
30%
Probability Theory
20%
Squared Error
20%
Convergence Rate
10%
Maximum Likelihood
10%
Occurrence Matrix
10%
Local Area
10%
Spatial Distribution
10%
Engineering
Multigrid
100%
Maximization
100%
Expectation Maximization Algorithm
100%
Histogram
50%
Grey Level
40%
Reconstructed Image
30%
Frequency Component
30%
High-Frequency Component
20%
Root-Mean-Squared Error
20%
Displacement Vector
20%
Spatial Distribution
10%
Extracted Feature
10%
Local Area
10%
Maximum Likelihood
10%
Rate of Convergence
10%
Coarse Grid
10%
Cooccurrence Matrix
10%