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Whole-body iodine scan (thyroid cancer)

A Whole-body iodine scan (thyroid cancer) is a nuclear medicine test of the whole body. It shows remaining thyroid tissue or spread after thyroid cancer surgery. Typical effective dose 1 to 5 mSv, similar to about 4 months to 2 years of natural background radiation (about 3 mSv a year).

सामान्य स्वास्थ्य जानकारी — यो निदान होइन। आपत्कालमा १०२ मा फोन गर्नुहोस्। सधैं योग्य स्वास्थ्यकर्मीसँग सल्लाह लिनुहोस्।

What it shows

Remaining thyroid tissue or spread after thyroid cancer surgery.

Why it is done

Thyroid cancer follow-up.

Preparation

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.

Radiation & safety

Typical effective dose 1 to 5 mSv, similar to about 4 months to 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 it takes

1 to 2 hours on day 2 to 3. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

Nuclear medicine

नतिजा व्याख्या गर्न डाक्टरलाई देखाउनुहोस् — एउटै परीक्षणले निदान गर्दैन।

यो कहाँ गर्न सकिन्छ

तपाईंनजिकको हेरचाह

नजिकका सुविधा देखाउन तपाईंको स्थान एक पटक प्रयोग गर्छ। केही सुरक्षित गरिँदैन।

सामान्य प्रश्न

What does a i131 scan show?
Remaining thyroid tissue or spread after thyroid cancer surgery.

Why is a i131 scan done?
Thyroid cancer follow-up.

How do I prepare for a i131 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 i131 scan use radiation?
Typical effective dose 1 to 5 mSv, similar to about 4 months to 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 i131 scan take?
1 to 2 hours on day 2 to 3

Whole-body iodine scan (thyroid cancer) किन गरिन्छ?
Thyroid cancer follow-up.

Whole-body iodine scan (thyroid cancer) का लागि कसरी तयारी गर्ने?
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.

Whole-body iodine scan (thyroid cancer) गर्भावस्थामा सुरक्षित छ?
Typical effective dose 1 to 5 mSv, similar to about 4 months to 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.

स्रोत: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

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