Effects of Ultrasound Section-Thickness on Brachytherapy Needle Tip Localization Error

  • Mohammad Peikari
  • Thomas Kuiran Chen
  • Andras Lasso
  • Tamas Heffter
  • Gabor Fichtinger
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6891)

Abstract

Purpose: Ultrasound section-thickness is the out-of-plane beamwidth causing major roles in creating image artifacts normally appearing around the anechoic areas. These artifacts can introduce errors in localizing the needle tips during any ultrasound-guided procedure. To study how section-thickness and imaging parameters can affect observing and localizing needle tips, we have conducted a typical calibration setup experiment. Method: Multiple needles were inserted orthogonal to the axial image plane, at various distances from the transducer. The experiment was conducted on a brachytherapy stepper for a curvilinear transrectal-ultrasound probe. Result: Experiments demonstrated that the imaging parameters have direct impacts on observing needle tips at different axial locations. They suggest specific settings to minimize the imaging artifacts. Conclusion: The ultrasound section-thickness and side lobes could result in misjudgment of needle insertion depth in an ultrasound-guided procedure. A beam profile could assist in considering the likelihood of position errors, when the effects of side lobes are minimized.

Keywords

Side Lobe Needle Insertion Beam Pattern TRUS Image TRUS Probe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Mohammad Peikari
    • 1
  • Thomas Kuiran Chen
    • 1
  • Andras Lasso
    • 1
  • Tamas Heffter
    • 1
  • Gabor Fichtinger
    • 1
  1. 1.School of ComputingQueen’s UniversityKingstonCanada

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