Biopsy needle artifact localization in MRI-guided robotic transrectal prostate intervention

Sang Eun Song, Nathan Bongjoon Cho, Iulian I. Iordachita, Peter Guion, Gabor Fichtinger, Aradhana Kaushal, Kevin Camphausen, Louis L. Whitcomb

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Recently a number of robotic intervention systems for magnetic resonance image (MRI)-guided needle placement in the prostate have been reported. In MRI-guided needle interventions, after a needle is inserted, the needle position is often confirmed with a volumetric MRI scan. Commonly used titanium needles are not directly visible in an MRI, but they generate a susceptibility artifact in the immediate neighborhood of the needle. This paper reports the results of a quantitative study of the relationship between the true position of titanium biopsy needle and the corresponding needle artifact position in MRI, thereby providing a better understanding of the influence of needle artifact on targeting errors. The titanium needle tip artifact extended 9 mm beyond the actual needle tip location with tendency to bend toward the scanner's B 0 magnetic field direction, and axially displaced 0.38 and 0.32 mm (mean) in scanner's frequency and phase encoding direction, respectively.

Original languageEnglish (US)
Article number2192118
Pages (from-to)1902-1911
Number of pages10
JournalIEEE Transactions on Biomedical Engineering
Issue number7
StatePublished - 2012
Externally publishedYes


  • Needle artifact
  • prostate intervention
  • robotic intervention
  • transrectal biopsy

ASJC Scopus subject areas

  • Biomedical Engineering


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