Abstract #4503
Development of a hindered-diffusion-dominant DTI phantom made of polyethylene fibers: Comparison with a restricted-diffusion phantom.
Atsushi Tachibana 1 , Takayuki Obata 1 , Yasuhiko Tachibana 1 , Hiroshi Kawaguchi 2 , Jeff Kershaw 2 , Ichio Aoki 2 , Hiroshi Ito 2 , and Hiroshi Tsuji 1
1
Research Center for Charged Particle
Therapy, National Institute of Radiological Sciences,
Chiba-shi, Chiba, Japan,
2
Molecular
Imaging Center, National Institute of Radiological
Sciences, Chiba-shi, Chiba, Japan
This study investigates the diffusion characteristics of
our newly developed DTI phantom made of bundled
polyethylene fibers (Dyneema (Dy)), in comparison to a
conventionally used glass made phantom with micro
capillaries (capillary plates (CP)). Dy was less
sensitive to diffusion time, implying that the water
diffusion is hindered rather than restricted. Dy also
had b-value dependent signal attenuation more similar to
that in vivo tissue, and was much less expensive than
CP. These suggest that Dy is a better phantom for DTI QC
than CPs.
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