Abstract: An image processing apparatus performs first noise reduction processing on a plurality of radiation images corresponding to mutually-different radiation energies, generates a decomposition image by energy subtraction processing using the plurality of radiation images obtained by performing the first noise reduction processing, and performs second noise reduction processing on the decomposition image, wherein the second noise reduction processing uses a filter that differs from a filter used in the first noise reduction processing in at least one of size and type.

Abstract: Provided are a toothbrush module, a toothbrush attachment, a brushing assistance system, a brushing evaluation system, a brushing assistance device, and a brushing assistance program that ease obtainment of a brushing action of a user even during brushing. A toothbrush attachment (2) includes: a sensor unit (21) that detects a predetermined physical quantity; a wireless transmission unit (22) that transmits a radio signal indicating the physical quantity detected by the sensor unit (21); a housing unit (201) that houses the sensor unit (21) and the wireless transmission unit (22); and a coupling mechanism (202) that removably attaches the housing unit (201) to a toothbrush (4).

Abstract: Provided are a toothbrush module, a toothbrush attachment, a brushing assistance system, a brushing evaluation system, a brushing assistance device, and a brushing assistance program that ease obtainment of a brushing action of a user even during brushing. A toothbrush attachment (2) includes: a sensor unit (21) that detects a predetermined physical quantity; a wireless transmission unit (22) that transmits a radio signal indicating the physical quantity detected by the sensor unit (21); a housing unit (201) that houses the sensor unit (21) and the wireless transmission unit (22); and a coupling mechanism (202) that removably attaches the housing unit (201) to a toothbrush (4).