Abstract: A scintillation crystal array, a detector, a medical imaging device, and a manufacturing method, and solve the problem of image distortion in PET caused by the use of an ESR layer in a scintillation crystal array. The scintillation crystal array includes a plurality of scintillation crystal units, a gap is provided between each two adjacent scintillation crystal units, first reflecting layers are arranged in a part of the gaps of the scintillation crystal array, and second reflecting layers are arranged in a part of the gaps. The first reflecting layers are made of a thin film-like material, and the second reflecting layers are made of an amorphous material. By filling the gaps between the scintillation crystal units with the two types of reflecting layers, it becomes possible to leverage the high reflectivity of the thin film-like material while preventing issues in the scintillation crystal array.

Abstract: A crystal growth method comprises: in a process of growing a crystal by using a pulling method, controlling an induction coil to move downwards with respect a crucible, wherein the induction coil moves with an acceleration after the crystal enters an equal-diameter stage, and the moving speed of the induction coil tends to continuously increase during the entire moving process of the induction coil. According to the crystal growth method, a change in a temperature gradient of a crystal growth interface caused by the internal temperature distribution of the crucible can be compensated, a continuous and stable temperature field environment is provided for crystal growth, and defects generated during a crystal growth process are reduced.