Characterizing the field-dependent T1-relaxation and imaging of ferrofluids using high-Tc superconducting quantum interference device magnetometer in low magnetic fields

S. H. Liao; Hong Chang Yang; H. E. Horng; C. W. Liu; H. H. Chen; M. J. Chen; K. L. Chen; C. I. Liu; L. M. Wang

doi:10.1063/1.4770304

Characterizing the field-dependent T₁-relaxation and imaging of ferrofluids using high-T_c superconducting quantum interference device magnetometer in low magnetic fields

S. H. Liao
, Hong Chang Yang^*
, H. E. Horng
, C. W. Liu
, H. H. Chen
, M. J. Chen
, K. L. Chen
, C. I. Liu
, L. M. Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In this paper, we investigate the field-dependent T₁-relaxation and T₁-contrast imaging of ferrofluids using high-T_c superconducting quantum interference device (SQUID)-detected nuclear magnetic resonance and imaging in low magnetic fields, where T₁ is the spin-lattice relaxation time. It was found that the 1/T₁ of ferrofluids increases when the prepolarization field increases. We attribute this to the enhanced magnetic-field gradients generated from the induced magnetization that accelerates the T₁-relaxation more in a high strength of fields in comparison to a low strength of fields. Using phantoms with different relaxation times, the T₁-contrast images are demonstrated in low magnetic fields, which can be promising for discriminating tumors.

Original language	English
Article number	123908
Journal	Journal of Applied Physics
Volume	112
Issue number	12
DOIs	https://doi.org/10.1063/1.4770304
Publication status	Published - 2012 Dec 15

ASJC Scopus subject areas

General Physics and Astronomy

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Liao, S. H., Yang, H. C., Horng, H. E., Liu, C. W., Chen, H. H., Chen, M. J., Chen, K. L., Liu, C. I., & Wang, L. M. (2012). Characterizing the field-dependent T₁-relaxation and imaging of ferrofluids using high-T_c superconducting quantum interference device magnetometer in low magnetic fields. Journal of Applied Physics, 112(12), Article 123908. https://doi.org/10.1063/1.4770304

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title = "Characterizing the field-dependent T1-relaxation and imaging of ferrofluids using high-Tc superconducting quantum interference device magnetometer in low magnetic fields",

abstract = "In this paper, we investigate the field-dependent T1-relaxation and T1-contrast imaging of ferrofluids using high-Tc superconducting quantum interference device (SQUID)-detected nuclear magnetic resonance and imaging in low magnetic fields, where T1 is the spin-lattice relaxation time. It was found that the 1/T1 of ferrofluids increases when the prepolarization field increases. We attribute this to the enhanced magnetic-field gradients generated from the induced magnetization that accelerates the T1-relaxation more in a high strength of fields in comparison to a low strength of fields. Using phantoms with different relaxation times, the T1-contrast images are demonstrated in low magnetic fields, which can be promising for discriminating tumors.",

author = "Liao, \{S. H.\} and Yang, \{Hong Chang\} and Horng, \{H. E.\} and Liu, \{C. W.\} and Chen, \{H. H.\} and Chen, \{M. J.\} and Chen, \{K. L.\} and Liu, \{C. I.\} and Wang, \{L. M.\}",

note = "Funding Information: This work was supported by the National Science Council of Taiwan under Grant Nos. NSC100-2120-M-002-015, NSC101-2120-M-168-001, and NSC 100-2112-M-003-011-MY2 and National Taiwan Normal University under Grant No. 101T309102. ",

year = "2012",

month = dec,

day = "15",

doi = "10.1063/1.4770304",

language = "English",

volume = "112",

journal = "Journal of Applied Physics",

issn = "0021-8979",

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T1 - Characterizing the field-dependent T1-relaxation and imaging of ferrofluids using high-Tc superconducting quantum interference device magnetometer in low magnetic fields

AU - Liao, S. H.

AU - Yang, Hong Chang

AU - Horng, H. E.

AU - Liu, C. W.

AU - Chen, H. H.

AU - Chen, M. J.

AU - Chen, K. L.

AU - Liu, C. I.

AU - Wang, L. M.

N1 - Funding Information: This work was supported by the National Science Council of Taiwan under Grant Nos. NSC100-2120-M-002-015, NSC101-2120-M-168-001, and NSC 100-2112-M-003-011-MY2 and National Taiwan Normal University under Grant No. 101T309102.

PY - 2012/12/15

Y1 - 2012/12/15

N2 - In this paper, we investigate the field-dependent T1-relaxation and T1-contrast imaging of ferrofluids using high-Tc superconducting quantum interference device (SQUID)-detected nuclear magnetic resonance and imaging in low magnetic fields, where T1 is the spin-lattice relaxation time. It was found that the 1/T1 of ferrofluids increases when the prepolarization field increases. We attribute this to the enhanced magnetic-field gradients generated from the induced magnetization that accelerates the T1-relaxation more in a high strength of fields in comparison to a low strength of fields. Using phantoms with different relaxation times, the T1-contrast images are demonstrated in low magnetic fields, which can be promising for discriminating tumors.

AB - In this paper, we investigate the field-dependent T1-relaxation and T1-contrast imaging of ferrofluids using high-Tc superconducting quantum interference device (SQUID)-detected nuclear magnetic resonance and imaging in low magnetic fields, where T1 is the spin-lattice relaxation time. It was found that the 1/T1 of ferrofluids increases when the prepolarization field increases. We attribute this to the enhanced magnetic-field gradients generated from the induced magnetization that accelerates the T1-relaxation more in a high strength of fields in comparison to a low strength of fields. Using phantoms with different relaxation times, the T1-contrast images are demonstrated in low magnetic fields, which can be promising for discriminating tumors.

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VL - 112

JO - Journal of Applied Physics

JF - Journal of Applied Physics

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Characterizing the field-dependent T₁-relaxation and imaging of ferrofluids using high-T_c superconducting quantum interference device magnetometer in low magnetic fields

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