Gel sheet, ultrasonic inspection system, and method for manufacturing gel sheet

An ultrasonic inspection system comprising:

• an ultrasonic inspection device that has an ultrasonic probe having a sensor portion detecting reflected waves of emitted ultrasonic waves reflected from a subject and an image converting portion converting an electric signal from the ultrasonic probe to ultrasonic image data;
• a gel sheet that is used by being interposed between the ultrasonic probe and the subject and has, in a predetermined region of a front surface, a formed portion to which a treatment including any one of a projection, a recess, a periodically formed unevenness portion, or a predetermined surface treatment is applied in correspondence to predetermined information, with the region in which the formed portion is formed being different in movement resistance against the ultrasonic probe in comparison to other regions;
• and
• a management server that has a storage portion storing the predetermined information corresponding to the formed portion and a collating portion collating, by aligning the ultrasonic probe with the formed portion, the information stored in the storage portion and the information corresponding to the formed portion and is capable of selecting, based on a collation result of the collating portion, desired information from the information stored in the storage portion.