Presentation (CTI)

OBJECTIVES: The nuclear medicine industry is a strategic emerging industry, and policy support is crucial for its development. This study aims to analyze the thematic structure and differences between national and provincial nuclear medicine policies in China, providing a reference for policy optimization.
METHODS: National and provincial nuclear medicine-related policies were collected, and the average publication interval were calculated. A weighted Policy Strength Index (PSI) was constructed to evaluate policy intensity. The LDA topic model was applied to extract policy topics and compare national and provincial topic intensities. Meanwhile, topic clustering coefficients were calculated based on the topic-word probability matrix.
RESULTS: A total of 24 national-level and 69 provincial-level nuclear medicine policies were collected. The average publication interval was 13.02 months at the national level and 3.24 months at the provincial level. The mean PSI was 2.6 for national policies and 1.43 for provincial ones. Five topics were extracted by LDA, and the intensity comparison showed: Topic 1 (national: 0.06, provincial: 0.30, p < 0.01), Topic 2 (0.74, 0.09, p < 0.01$), Topic 3 (0.01, 0.24, p < 0.01), Topic 4 (0.03, 0.28, p < 0.01), and Topic 5 (0.16, 0.08, p = 0.19). National policies were highly concentrated on Topic 2 (accounting for 74%), whereas provincial policies were mainly distributed across Topics 1, 3, and 4 (collectively accounting for 82%). The topic clustering coefficients were T1 = 0.25, T2 = 0.22, T3 = 0.33, T4 = 0.33, and T5 = 0.20.
CONCLUSIONS: Significant differences exist in the distribution of policy topics between the national and provincial levels, and the comprehensive intensity of provincial policies remains relatively low. It is recommended to strengthen the alignment between national and provincial policies and enhance the quantification level and collaborative capacity of provincial policies.