Singing a Tumor Test Song

Singing may be the next-generation, noninvasive approach to determining the health of a patient’s thyroid. When a person sings, the vibrations create waves in the tissue near the vocal tract called shear waves. If a tumor is present in the thyroid, the elasticity of its surrounding tissue increases, stiffening, and causing the shear waves to accelerate. Using ultrasound imaging to measure these waves, researchers can determine the elasticity of the thyroid tissue. They demonstrate the technique in Applied Physics Letters.