MRI monitoring of laser ablation using optical flow

Gary P. Zientara, Pairash Saiviroonporn, Paul R. Morrison, Marvin P. Fried, Stephen G. Hushek, Ron Kikinis, Ferenc A. Jolesz

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The optical flow method is used for visualizing and quantifying the dynamics of tissue changes observed by MRI during thermal ablations. An approach was implemented for parallel two-dimensional optical flow calculations including the replacement of spurious velocities. Velocity magnitude results were found to be accurate in low-noise cases in tests using series of synthetic images. Optical flow results are presented from thermal ablation experiments utilizing a homogeneous polyacrylamide gel phantom and heterogeneous rabbit liver tissue in vivo, exhibiting heating and cooling with the accompanying quantitative characterization of the dilation and contraction of the thermally affected region. Results demonstrate that optical flow is capable of noninvasive real-time monitoring and control of interstitial laser therapy (ILT).

Original languageEnglish (US)
Pages (from-to)1306-1318
Number of pages13
JournalJournal of Magnetic Resonance Imaging
Volume8
Issue number6
StatePublished - Nov 1998
Externally publishedYes

Fingerprint

Laser Therapy
Hot Temperature
Heating
Noise
Dilatation
Rabbits
Liver
polyacrylamide gels

Keywords

  • Laser ablation
  • Magnetic resonance imaging
  • Optical flow
  • Therapy monitoring

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Zientara, G. P., Saiviroonporn, P., Morrison, P. R., Fried, M. P., Hushek, S. G., Kikinis, R., & Jolesz, F. A. (1998). MRI monitoring of laser ablation using optical flow. Journal of Magnetic Resonance Imaging, 8(6), 1306-1318.

MRI monitoring of laser ablation using optical flow. / Zientara, Gary P.; Saiviroonporn, Pairash; Morrison, Paul R.; Fried, Marvin P.; Hushek, Stephen G.; Kikinis, Ron; Jolesz, Ferenc A.

In: Journal of Magnetic Resonance Imaging, Vol. 8, No. 6, 11.1998, p. 1306-1318.

Research output: Contribution to journalArticle

Zientara, GP, Saiviroonporn, P, Morrison, PR, Fried, MP, Hushek, SG, Kikinis, R & Jolesz, FA 1998, 'MRI monitoring of laser ablation using optical flow', Journal of Magnetic Resonance Imaging, vol. 8, no. 6, pp. 1306-1318.
Zientara GP, Saiviroonporn P, Morrison PR, Fried MP, Hushek SG, Kikinis R et al. MRI monitoring of laser ablation using optical flow. Journal of Magnetic Resonance Imaging. 1998 Nov;8(6):1306-1318.
Zientara, Gary P. ; Saiviroonporn, Pairash ; Morrison, Paul R. ; Fried, Marvin P. ; Hushek, Stephen G. ; Kikinis, Ron ; Jolesz, Ferenc A. / MRI monitoring of laser ablation using optical flow. In: Journal of Magnetic Resonance Imaging. 1998 ; Vol. 8, No. 6. pp. 1306-1318.
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