Riken Corporation

Shisei Datum Co., Ltd.

Shu Takagi

Ryutaro Himeno

Takuya Maeyama

Shigeho Noda

Nobuhisa Fukunishi

Kazuaki Fukasaku

Yukiyoshi Saito

Kenichi Ishikawa

Fuyou Liang

Takuya Furuta

A vascular viscoelasticity evaluation device and method in which, a pulse wave obtained using a cuff is subjected to first derivation, a positive amplitude peak value Vfthat occurs first and a negative amplitude peak value Vrthat occurs second out of a plurality of negative amplitude peak values are detected in a state in which an external force substantially the same as or greater than the systolic blood pressure has been exerted on a blood vessel, and a ratio of the positive amplitude peak value Vfthat occurs first to the negative amplitude peak value Vrthat occurs second is calculated, and then the vascular viscoelasticity is evaluated on the basis of this calculated ratio.

Vascular viscoelasticity evaluation device, vascular viscoelasticity evaluation method, and program

To measure three-dimensional dose distributions with a dosimeter, such as a gel dosimeter. In an embodiment of the present invention, provided is a gel dosimeter having water, as solvent or disperse medium, clay particles that swell with water, and recording material precursor, which are dissolved or dispersed with each other. The recording material precursor has an atom or ion, wherein the atom or ion changes its valence number by reacting with both of a radical and a molecular radical derivative. The radical is to be generated from the water ionized by irradiation of radiation rays, and the molecular radical derivative is a molecule to be formed by bonding the radicals with each other. By the time radiation rays are irradiated, the gel dosimeter has been free from a substance identical to the molecular radical derivative and has lost fluidity.

Gel dosimeter for measuring radiation dosage and manufacturing method therefor

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Wako, Japan

Shu Takagi