SSFP-based MR thermometry

Vaishali Paliwal, Abdel Monem El-Sharkawy, Xiangying Du, Xiaoming Yang, Ergin Atalar

Research output: Contribution to journalArticlepeer-review

Abstract

Of the various techniques employed to quantify temperature changes by MR, proton resonance frequency (PRF) shift-based phase-difference imaging (PDI) is the most accurate and widely used. However, PDI is associated with various artifacts. Motivated by these limitations, we developed a new method to monitor temperature changes by MRI using the balanced steady-state free precession (balanced-SSFP) pulse sequence. Magnitude images obtained with the SSFP pulse sequence were used to find the PRF shift, which is proportional to temperature change. Spatiotemporal temperature maps were successfully reconstructed with this technique in gel phantom experiments and a rabbit model. The results show that the balanced-SSFP-based method is a promising new technique for monitoring temperature.

Original languageEnglish (US)
Pages (from-to)704-708
Number of pages5
JournalMagnetic resonance in medicine
Volume52
Issue number4
DOIs
StatePublished - Oct 2004

Keywords

  • Ablation
  • MR thermometry
  • MRI
  • Proton resonance frequency shift
  • SSFP
  • Thermal mapping

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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