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A member asked:
Why is an ultrasound preferred over a ct scan, when it comes to assessing a nodule on the thyroid? what benefits does ct provide over ultrasound?
3 doctors weighed in across 2 answers
Solid vs. cystic: For thyroid nodules, the 1st question asked is, "solid or cystic?". The answer has implications for treatment & prognosis. The CT scan & ultrasound (US) measure different things. CT uses X-rays to look at nuclear density (minerals vs. carbon) whereas US uses sound waves to determine if nodule is solid vs. liquid (cystic). CT uses tomography (math, faster) whereas US uses hand-scanning (slower).
Answered 10/24/2017
807 views
Ultrasound: Uses no ionizing radiation, and has superior contrast and spatial resolution relative to standard CT for the thyroid. Additionally, if biopsy is necessary, ultrasound is used for needle guidance.
Answered 3/24/2020
807 views
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