Abstract
Using ultrasound for the diagnostic workup of thyroid lesions is a widely accepted technique. An inexpensive phantom model of thyroid lesions would be an invaluable tool for engaging medical students in learning the diagnostic algorithm for thyroid lesions and how to perform fine needle aspiration (FNA). The aim of this study was to devise an inexpensive and reproducible training phantom model for thyroid lesion detection, image interpretation and in vitro FNA using ultrasound guidance. A simple phantom model imitating benign cystic lesions, intermediately suspicious lesions and highly suspicious lesions was developed using a chicken breast, red seedless grapes, pimento olives and blackberries. The phantom was constructed for a total cost of $4.09 per unit and constructed in approximately 3 min. Nine models were constructed in total, demonstrating that the model design is replicable. This thyroid FNA phantom is an inexpensive, easy-to-produce model that allows medical students to practice measuring lesions and performing FNAs using ultrasonography. Future studies could be explored to assess this model's role in medical student education.
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