A Parathyroid (sestamibi) scan is a nuclear medicine test of the neck. It shows overactive parathyroid glands. Typical effective dose 5 to 7 mSv, similar to about 2 years of natural background radiation (about 3 mSv a year).
General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.
A Parathyroid (sestamibi) scan is a nuclear medicine test of the neck. It shows overactive parathyroid glands. Typical effective dose 5 to 7 mSv, similar to about 2 years of natural background radiation (about 3 mSv a year). What it shows: Overactive parathyroid glands. generated by SI from cited sources · general information, not a diagnosis · consult a health professional
Overactive parathyroid glands.
High calcium with raised PTH, before surgery.
A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.
Typical effective dose 5 to 7 mSv, similar to about 2 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.
2 to 3 hours. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
Nuclear medicine
Consult a doctor to interpret results — a single test does not make a diagnosis.
Uses your location once to list the nearest facilities. Nothing is stored.
What does a sestamibi scan show?
Overactive parathyroid glands.
Why is a sestamibi scan done?
High calcium with raised PTH, before surgery.
How do I prepare for a sestamibi scan?
A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.
Does a sestamibi scan use radiation?
Typical effective dose 5 to 7 mSv, similar to about 2 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.
How long does a sestamibi scan take?
2 to 3 hours
Why is Parathyroid (sestamibi) scan done?
High calcium with raised PTH, before surgery.
How do I prepare for Parathyroid (sestamibi) scan?
A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.
Is Parathyroid (sestamibi) scan safe in pregnancy?
Typical effective dose 5 to 7 mSv, similar to about 2 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.
SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.