The 3D Printing Method for Preparing 131I Thyroid Body Source

This research investigates the utilization of 3D printing technology and the phase transfer method to fabricate photosensitive resin containing the radionuclide 131I，aiming to simulate the neck-thyroid source model for the efficiency calibration of detectors. Through optimizing the type，dosage，mixing time of the phase transfer agent，as well as the addition amount of 131I，a well-uniform 131I photosensitive resin was successfully prepared. By means of 3D printing technology，the thyroid source model was fabricated and a comparative measurement was conducted with the IAEA (International Atomic Energy Agency)/ANSI (American National Standards Institute) neck phantom. The experimental results indicate that the detection efficiency of the thyroid source model prepared using 131I photosensitive resin is in line with that of the IAEA/ANSI neck phantom，proving the feasibility of 3D printing technology and phase transfer method for preparing photosensitive resin thyroid body source and offering a novel approach for the preparation of other complex heterogeneous source models.