Removing Signal Intensity Inhomogeneity From Surface Coil MRI Using Discrete Wavelet Transform and Wavelet Packet

Abstract

We evaluate a combined discrete wavelet transform (DWT) and wavelet packet algorithm to improve the homogeneity of magnetic resonance imaging when a surface coil is used for reception. The proposed algorithm estimates the spatial sensitivity profile of the surface coil from the original anatomical image and uses this information to normalize the image intensity variations. Estimation of the coil sensitivity profile based on the wavelet transform of the original image data is found to provide a robust method for removing the slowly varying spatial sensitivity pattern.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA412082

Entities

People

  • Fa-hsuan Lin
  • John W. Belliveau
  • Lawrence L. Wald
  • Ying-jui Chen

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Algorithms
  • Anatomy
  • Arrays
  • Background Noise
  • Brain
  • Decomposition
  • Filters
  • Frequency
  • Frequency Bands
  • Geometry
  • Health Services
  • Intensity
  • Low Pass Filters
  • Magnetic Properties
  • Phased Arrays
  • Sensitivity
  • Wavelet Transforms

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Image Processing and Computer Vision.
  • Microwave Engineering.