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    Clinical utility of ultrasound and 99mTc sestamibi SPECT/CT for preoperative localization of parathyroid adenoma in patients with primary hyperparathyroidism - Clinical Radiology
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    On ultrasound, the normal thyroid gland has a homogeneous (smooth/uniform), medium- to high-level echogenicity (brightness level). Key landmarks include the trachea, esophagus, blood vessels (carotid arteries and jugular vein), and surrounding muscle groups. The size and shape of the thyroid lobes vary widely in the normal population. To perform a healthy thyroid ultrasound, it is important to have a sound understanding of thyroid anatomy, prepare the patient, apply gel, select probe frequency, scan the thyroid, and document and interpret the results.