Abstract: An ultrasound auxiliary device, comprising: a main body, including: a cavity, located inside the main body, wherein the cavity can be used to contain fluid, and the ultrasound auxiliary device is configured to adjust a thickness thereof according to a volume or distribution of the fluid located inside the cavity; and a plurality of positioning marks, located in the main body, wherein the positioning marks are arranged in at least two directions perpendicular to each other, and the positioning marks have the same spacing in any of the directions.

Abstract: An ultrasound-guided biopsy auxiliary device includes a body, the body includes a sampling conduit penetrating through the body; an injection port located on a surface of the body and in fluid communication with the sampling conduit; and a plurality of positioning marks located in the body, wherein the plurality of positioning marks are arranged along at least two directions perpendicular to each other, and in either direction, spacings between the positioning marks are in the same size. The ultrasound-guided biopsy auxiliary device is suitable for assisting the ultrasound-guided biopsy of a human body.

Abstract: A lighting module circuit comprises a light-emitting unit and a composite flicker frequency circuit. The light-emitting unit includes a plurality of light-emitting devices connected in series. The composite flicker frequency circuit has at least one input terminal, a first output terminal for outputting a first output signal with a first flicker frequency, and a second output terminal for outputting a second output signal with a second flicker frequency different from the first flicker frequency. The light-emitting unit is coupled between a power supply terminal and the second output terminal, and the first output terminal is coupled to one of the plurality of light-emitting devices.