Abstract: An accuracy calculation unit receives an ultrasound image generated by transmitting and receiving an ultrasonic wave, and specifies an imaging scene by a plurality of types of specifying processing for specifying the imaging scene of the ultrasound image. Further, the accuracy calculation unit calculates accuracy of specifying the imaging scene for each specifying processing. The determination unit determines an examination action to be performed next on the basis of a result of calculation by the accuracy calculation unit.

Abstract: Disclosed is a discrimination method of tumor cells, which can distinguish between tumor cells and normal cells. By administering in vivo a fluorescent dye such as 5-aminolevurinic acid (ALA) and light scattering particles such as titanium oxide particles separately and by irradiating light, there can be obtained fluorescence of such an intensity that makes it possible to distinguish between the tumor cells and the normal cells more definitely than fluorescence obtained with the fluorescent dye alone. Furthermore, the fluorescence emission time is extended by administering in vivo the fluorescent dye and the light scattering particles separately.