Special small animal fixing device for thyroid iodine-131 rate function test

The utility model discloses a special small animal fixing device for a thyroid iodine-131 rate function test. The special small animal fixing device comprises a plate frame, a small animal fixing cylinder and two collimating plates, the plate frame is composed of a vertical plate and a transverse plate fixed to the front face of the vertical plate, the vertical plate is provided with a vertical plate open groove, and the transverse plate is provided with a tail positioning hole. The small animal fixing cylinder is formed by connecting a fixing cylinder main body and a positioning mechanism. According to the small animal fixing barrel, a small animal can be fixed in the small animal fixing barrel, it is ensured that the small animal does not move in the testing process, the thyroid gland of the small animal is fully exposed, and an iodine-131 rate measuring functional instrument can detect gamma rays emitted by the thyroid gland of the small animal through the collimation window and the linear notch; gamma ray