Tagged MR imaging in a deforming phantom: Photographic validation

Christopher C. Moore, Scott B. Reeder, Elliot R. McVeigh

Research output: Contribution to journalArticlepeer-review

Abstract

PURPOSE: To validate cine magnetic resonance (MR) image tagging measurements of a deforming object by means of a precise photographic method. MATERIALS AND METHODS: A piece of silicone rubber that acted as a phantom was stretched in a cyclical fashion inside a plastic clamp driven by a respirator pump. Deformation as a function of time was measured with a rapid gradient- echo cine tagging sequence and with sequential stroboscopic photographs. Deformations from 1.0 to 1.2 (0% to 20% stretch) in the readout direction were measured over a 7-cm region of the phantom, which had a maximum standard error of ±0.001 with photography and a maximum standard error of ±0.003 with MR imaging. RESULTS: The deformation versus time values measured with MR imaging had a standard error of 0.002 about a straight line fit to the photographic deformation versus time data. These results demonstrate that the MR imaging deformation estimates were accurate and precise. CONCLUSION: The validated tagging method can now be used to evaluate MR imaging motion estimation techniques.

Original languageEnglish (US)
Pages (from-to)765-769
Number of pages5
JournalRadiology
Volume190
Issue number3
StatePublished - Mar 1994

Keywords

  • Magnetic resonance (MR), cine study
  • Magnetic resonance (MR), motion studies
  • Phantoms
  • Test objects

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

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