• Matlab
  • Simulink
  • NS3
  • OMNET++
  • NS2

A Curve Fitting Approach Using ANN for CT Number 

Energy-mapping, the conversion of linear attenuation coefficients ($mu $) calculated at the effective computed tomography (CT) energy to those corresponding to 511 keV, is an important step in CT-based attenuation correction (CTAC) for positron emission tomography (PET) quantification. The aim of this study was to implement energy-mapping step by using curve fitting ability of artificial neural network (ANN). Eleven digital phantoms simulated by Geant4 application for tomographic emission (GATE) and 12 physical phantoms composed of various volume concentrations of iodine contrast were used in this study to generate energy-mapping curves by acquiring average CT values and linear attenuation coefficients at 511 keV of these phantoms. The curves were built with ANN toolbox in MATLAB. To evaluate the effectiveness of the proposed method, another two digital phantoms (liver and spine-bone) and three physical phantoms (volume concentrations of 3%, 10% and 20%) were used to compare the energy-mapping curves built by ANN and bilinear transformation, and a semi-quantitative analysis was proceeded by injecting 0.5 mCi FDG into a SD rat for micro-PET scanning.

The results showed that the percentage relative difference (PRD) values of digital liver and spine-bone phantom are 5.46% and 1.28% based on ANN, and 19.21% and 1.87% based on bilinear transformation. For 3%, 10% and 20% physical phantoms, the PRD values of ANN curve are 0.91%, 0.70% and 3.70%, and the PRD values of bilinear transformation are 3.80%, 1.44% and 4.30%, respectively. Both digital and physical phantoms indicated that the ANN curve can achieve better performance than bilinear transformation. The semi-quantitative analysis of rat PET images showed that the ANN curve can reduce the inaccuracy caused by attenuation effect from 13.75% to 4.43% in brain tissue, and 23.26% to 9.41% in heart tissue. On the other hand, the in- ccuracy remained 6.47% and 11.51% in brain and heart tissue when the bilinear transformation was used. Overall, it can be concluded that the bilinear transformation method resulted in considerable bias and the newly proposed calibration curve built by ANN could achieve better results with acceptable accuracy

Subscribe Our Youtube Channel

You can Watch all Subjects Matlab & Simulink latest Innovative Project Results

Watch The Results

Our services

We want to support Uncompromise Matlab service for all your Requirements Our Reseachers and Technical team keep update the technology for all subjects ,We assure We Meet out Your Needs.

Our Services

  • Matlab Research Paper Help
  • Matlab assignment help
  • Matlab Project Help
  • Matlab Homework Help
  • Simulink assignment help
  • Simulink Project Help
  • Simulink Homework Help
  • Matlab Research Paper Help
  • NS3 Research Paper Help
  • Omnet++ Research Paper Help

Our Benefits

  • Customised Matlab Assignments
  • Global Assignment Knowledge
  • Best Assignment Writers
  • Certified Matlab Trainers
  • Experienced Matlab Developers
  • Over 400k+ Satisfied Students
  • Ontime support
  • Best Price Guarantee
  • Plagiarism Free Work
  • Correct Citations

Delivery Materials

Unlimited support we offer you

For better understanding purpose we provide following Materials for all Kind of Research & Assignment & Homework service.

  • Programs
  • Designs
  • Simulations
  • Results
  • Graphs
  • Result snapshot
  • Video Tutorial
  • Instructions Profile
  • Sofware Install Guide
  • Execution Guidance
  • Explanations
  • Implement Plan

Matlab Projects

Matlab projects innovators has laid our steps in all dimension related to math works.Our concern support matlab projects for more than 10 years.Many Research scholars are benefited by our matlab projects service.We are trusted institution who supplies matlab projects for many universities and colleges.

Reasons to choose Matlab Projects .org???

Our Service are widely utilized by Research centers.More than 5000+ Projects & Thesis has been provided by us to Students & Research Scholars. All current mathworks software versions are being updated by us.

Our concern has provided the required solution for all the above mention technical problems required by clients with best Customer Support.

  • Novel Idea
  • Ontime Delivery
  • Best Prices
  • Unique Work

Simulation Projects Workflow

Embedded Projects Workflow