Enhanced Ultrasound Visualization of Brachytherapy Seeds by a Novel Magnetically Induced Motion Imaging Method

Abstract

We report our progress in developing Magnetically Induced Motion Imaging (MIMI) for unambiguous identification and localization brachytherapy seeds in ultrasound images. In this period we have used finite-element models to determine a torque maximizing seed core shape to generate the greatest possible seed vibration for a given core volume. We present two new signal-processing methods. The first is a compounding method for suppression of "comet-tail" artifacts in segmented seed images. The second is a method for joining ends of seeds in segmented seed images based on the phase of the detected vibration signal. Both methods are demonstrated in vitro using a commercial ultrasound scanner and tissue-mimicking phantoms.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2007
Accession Number
ADA470978

Entities

People

  • Stephen McAleavey

Organizations

  • University of Rochester

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical

DTIC Thesaurus Topics

  • Algorithms
  • Artifacts
  • Data Sets
  • Dielectric Permittivity
  • Electromagnetic Fields
  • Electrostatic Fields
  • Frequency
  • Geometry
  • Image Processing
  • Image Reconstruction
  • Magnetic Cores
  • Magnetic Fields
  • Materials
  • Prostate Cancer
  • Radiotherapy
  • Three Dimensional
  • Ultrasounds

Fields of Study

  • Medicine
  • Physics

Readers

  • Aerodynamics.
  • Medical Imaging.