Photoacoustic matching material and human tissue simulation material

Abstract

Since a medium having light propagation properties and sound propagation properties similar to those of human tissues is provided, reflection of light and an acoustic wave at a surface of a test portion is prevented, and accuracy control of a photoacoustic wave diagnostic apparatus is realized. A photoacoustic matching material is provided which includes a polyol, an inorganic oxide, and a pigment, the latter two being dispersable in the polyol, and in this photoacoustic matching material, a dispersed amount of the inorganic oxide to the polyol is in a range of 0.10 to 0.25 percent by weight, and a dispersed amount of the pigment to the polyol is in a range of 0.0001 to 0.0005 percent by weight.

1 . A photoacoustic matching material comprising:
 a polyol,   an inorganic oxide, and   a pigment, the latter two being dispersable in the polyol,   wherein a dispersed amount of the inorganic oxide to the polyol is in a range of 0.10 to 0.25 percent by weight, and   a dispersed amount of the pigment to the polyol is in a range of 0.0001 to 0.0005 percent by weight.   
     
     
         2 . The photoacoustic matching material according to  claim 1 , further comprising an isocyanate compound. 
     
     
         3 . The photoacoustic matching material according to  claim 1 , wherein the polyol is a polyether polyol which includes a copolymer of ethylene oxide and propylene oxide at a molar ratio in a range of 30:70 to 70:30. 
     
     
         4 . The photoacoustic matching material according to  claim 1 , wherein the inorganic oxide includes titanium oxide. 
     
     
         5 . The photoacoustic matching material according to  claim 1 , wherein the pigment includes carbon black. 
     
     
         6 . The photoacoustic matching material according to  claim 1 , wherein the isocyanate compound includes hexamethylene diisocyanate. 
     
     
         7 . The photoacoustic matching material according to  claim 1 , wherein the photoacoustic matching material in the form of a liquid containing no isocyanate compound is housed in the photoacoustic matching material in the form of a solid containing an isocyanate compound. 
     
     
         8 . A human tissue simulation material comprising:
 a polyol,   an inorganic oxide, and   a pigment, the latter two being dispersable in the polyol,   wherein a dispersed amount of the inorganic oxide to the polyol is in a range of 0.10 to 0.25 percent by weight, and   a dispersed amount of the pigment to the polyol is in a range of 0.0001 to 0.0005 percent by weight.