Bi-exponential T2 decay in dairy cream phantoms

Craig Jones, Alex MacKay, Brian Rutt

Research output: Contribution to journalArticlepeer-review

Abstract

MRI phantoms are an important part of any experiment because they provide a reference of known parameters. There are many choices of mono- exponential T2 phantoms, but few choices for bi-exponential T2 phantoms. We have found that dairy cream provides an excellent bi-exponential T2 model with similar relaxation times to those found in white matter. Five cream phantoms of different milk fat percentages (2, 6, 10, 18 and 35%) were imaged with an optimized Carr-Purcell-Meiboom-Gill sequence. The decay curves for each of the phantoms were fit using Non-Negative Least Squares. We found that the short T2 component fraction relative to the total energy in the distribution correlated linearly (r = 0.9973) with the milk fat percentage. The short T2 time was 38 ± 4 ms and the long T2 time was 135 ± 4 ms.

Original languageEnglish (US)
Pages (from-to)83-85
Number of pages3
JournalMagnetic Resonance Imaging
Volume16
Issue number1
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

Keywords

  • Bi-exponential T decay
  • Myelin
  • Phantom
  • T relaxation

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

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