A minimal product method and its application to cortical imaging

Jie Lian, Bin He

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In order to reduce the spatial blurring effect due to the head volume conductor, cortical imaging technique (CIT) can be used to reconstruct the cortical potential distribution from the scalp potential measurement with enhanced spatial resolution. To overcome the ill-posed nature of the inverse problem, Tikhonov regularization (TIK) and truncated Singular Value Decomposition (TSVD) are commonly used by choosing the appropriate regularization parameter and truncation parameter, respectively. We have developed a minimal product method (MINP) to determine the regularization and truncation parameters. The present computer simulation and experimental results indicate that the MINP can be easily implemented in both TIK and TSVD with satisfactory performance, and suggest the potential applications of the MINP method in determining the corner of the L-curve.

Original languageEnglish (US)
Pages (from-to)209-217
Number of pages9
JournalBrain Topography
Volume13
Issue number3
DOIs
StatePublished - Apr 10 2001

Keywords

  • Cortical imaging
  • Inverse problem
  • L-curve
  • Minimal product method
  • Tikhonov regularization
  • Truncated SVD

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