The purpose of our study is to develop a high-fidelity thyroid education model, that can be utilized for medical students/ PGY doctors/ residents training. This model can help them better understand the structure of thyroid, learn about what are thyroid nodules, and practice thyroid fine needle aspiration examination with the model. The investigators would also evaluate the efficacy of using this model in student teaching.

Background： Thyroid nodular disorder is prevalent in Endocrine clinics, and while thyroid fine needle aspiration examination is crucial for evaluating nodules, conveying the procedure to students is challenging. The investigators propose a high-fidelity 3D model to enhance education, especially for hands-on practice. Our study aims to assess the model's education efficacy.

Study Design： This is a prospective study.

Methods： In our study, 3D scanning and 3D printing technology will be used to create the thyroid high-fidelity model. The investigators plan to choose 3D printing materials that enable the practice of thyroid fine needle aspiration produce with No.22 or No.23 needles.

Effect： The investigators hope to assist students understand the structure of thyroid and thyroid nodules better. And students will be able to practice thyroid fine needle aspiration examination with the 3D high-fidelity model. The outcome of our study may be utilized in medical schools or hospitals to facilitate student education.

Key words： 3D printing; medical education model; high-fidelity simulation; thyroid; fine needle aspiration

Inclusion Criteria:

• Medical students, medical interns, PGY physicians, and resident physicians training at Fu Jen Catholic University Hospital

Exclusion Criteria:

• Refused to participate in the study