Composition of MRI phantom equivalent to human tissues

Hirokazu Kato, Masahiro Kuroda, Koichi Yoshimura, Atsushi Yoshida, Katsumi Hanamoto, Shoji Kawasaki, Koichi Shibuya, Susumu Kanazawa

研究成果査読

77 被引用数 (Scopus)

抄録

We previously developed two new MRI phantoms (called the CAG phantom and the CAGN phantom), with T1 and T2 relaxation times equivalent to those of any human tissue at 1.5 T. The conductivity of the CAGN phantom is equivalent to that of most types of human tissue in the frequency range of 1 to 130 MHz. In this paper, the relaxation times of human tissues are summarized, and the composition of the corresponding phantoms are provided in table form. The ingredients of these phantoms are carrageenan as the gelling agent, GdCl 3 as a T1 modifier, agarose as a T2 modifier, NaCl (CAGN phantom only) as a conductivity modifier, NaN3 as an antiseptic, and distilled water. The phantoms have T1 values of 202-1904 ms and T2 values of 38-423 ms when the concentrations of GdCl3 and agarose are varied from 0-140 μmol/kg, and 0%-1.6%, respectively, and the CAGN phantom has a conductivity of 0.27-1.26 S/m when the NaCl concentration is varied from 0%-0.7%. These phantoms have sufficient strength to replicate a torso without the use of reinforcing agents, and can be cut by a knife into any shape. We anticipate the CAGN phantom to be highly useful and practical for MRI and hyperthermia-related research.

本文言語English
ページ(範囲)3199-3208
ページ数10
ジャーナルMedical Physics
32
10
DOI
出版ステータスPublished - 10月 2005

ASJC Scopus subject areas

  • 生物理学
  • 放射線学、核医学およびイメージング

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