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Radiation safety culture quantification in radiation medicine practice with time-spatial decomposition binary equal weight stakeholder model

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Purpose: To quantitatively evaluate the radiation safety culture in radiation medicine practice with Temporal-Spatial Decomposition Binary Equal Weight Stakeholder Model.
Method and materials: A radiotherapy treatment procedure was decomposed based on Temporal-Spatial information by combination of different stakeholders which are physician, physicist, dosimetrist, therapist, nurses, patient, administrator and others. The procedure included three steps, which were simulation, treatment planning and dose delivery. And each step included different radiation safety control corresponding to patient, radiation worker and general public in different levels. The radiation safety culture traits could generate outcomes at different safety level and display in the binary format for the success of the process. Each stakeholder’s weight in different radiation safety level would contribute to the overall score of the radiation safety level to patient, staff and general public. These quantified information were computed and optimized based on the decomposition function, which was represented by the product score and sums score determined by the temporal characteristics of the clinical procedure.
Results: Given the maximum number of safety culture trait at 9, two combinations of number of stakeholders and safety culture traits were calculated in simulation, treatment planning and dose delivery processes. For combination of maximum number of stakeholders and maximum number of traits, product scores were 3720087, 729 and 729; and sum scores were 72, 72, and 72; for minimum number of stakeholders and minimum number of traits, the product scores were 1, 1, and 1, and sum scores were 3, 3, and 3.
Conclusions: A simplified stakeholder model based on the temporal-spatial decomposed function was developed in describing radiotherapy treatment with the number of team members and culture traits implemented in binary mode. And this quantified methods of clinical procedures using radioactive materials and equipment provides potential for computer evaluation of complex clinical practice system.


radiation safety culture, radiotherapy, clinical procedure, binary model