Measuring T2 relaxation time in MRI gradient echo sequences

А.В. Протопопов

Measuring T2 relaxation time in MRI gradient echo sequences

research article UDC 537.635 Pages: 33-37

Keywords: Gradient recalled echo (GRE)Spin echo (SE)T2-relaxation Pearson coefficient

Abstract

In this article, a possibility to measure separately both magnetic gradients and transverse relaxation time T2 in gradient-recalled echo (GRE) sequence only, without application of spin-echo (SE) sequence was considered. Statistical analysis of phantom images in a form of two-dimensional graph together with single-value Pearson coefficient present quantitative confirmation for correctness of measuring T2 in GRE sequences.

How to cite

Протопопов А.В. Измерение времени поперечной релаксации Т2 в МРТ-последовательностях градиентного эха // Биомедицинская радиоэлектроника. 2018. № 4. С. 33–37.

References

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[1] Edelstein W.A., Hutchison J.M., Johnson G., Redpath T. Spin warp NMR imaging and applications to human whole-body imaging // Phys. Med. Biol. 1980. V.25. P. 751–756.

[2] Haase A., Matthaei D., Hanicke W., Frahm J. Dynamic digital subtraction imaging using fast low-angle shot MR movie sequence // Radiology. 1986.
V. 160. P. 537–541.

[3] Hahn E.L. Spin echoes // Physical Review. 1950. V. 80(4). P. 580–594.

[4] Fernandez-Seara M.A., Wehrli F.W. Postprocessing tech-nique to correct for background gradients in image-based R2* measurements // Magn. Reson. Med. 2000. V. 44. P. 358–366.

[5] Dahnke H., Schaeffter T. Limits of detection of SPIO at 3.0T using T2* relaxometry // Magn. Reson. Med. 2005. V. 53. P. 1202–1206.

[6] Protopopov A. Izmerenie gradientov magnitnogo polya v MRT. Ch. 1. Model i algoritmy // Elektromagnitnye volny i elektronnye sistemy. 2017. T.22(1). S. 37–44.

[7] Protopopov A. Izmerenie gradientov magnitnogo polya v MRT. Ch. 2. Eksperimenty na fantomah // Elektromag-nitnye volny i elektronnye sistemy. 2017. T. 22(2). S. 62–67.

[8] Reichenbach J.R., Hacklander Th., Harth T., Hofer M., Rassek M., Modder U. 1H T1 and T2 measurements of the MR imaging contrast agents Gd-DTPA and Gd-DTPA BMA at 1.5T // Eur. Radiol. 1997. V.7. P. 264–274.

[9] Rohrer M. Comparison of magnetic properties of MRI con-trast media solutions at different magnetic field strengths // Investigative Radiology. 2005. V. 40(11). P. 715–724.