Using Iodine-124 PET scans to assess metastatic thyroid cancer treatment

Lesion Dosimetry With Iodine-124 in Metastatic Thyroid Carcinoma

Phase 1 Interventional Memorial Sloan Kettering Cancer Center · NCT03647358

This study is testing a new type of PET scan using iodine-124 to see how well it can help doctors decide on the best treatment for people with metastatic thyroid cancer.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment60 (estimated)
Ages18 Years and up
SexAll
SponsorMemorial Sloan Kettering Cancer Center Academic / other
Locations1 site (New York, New York)
Trial IDNCT03647358 on ClinicalTrials.gov

What this trial studies

This study evaluates a new diagnostic imaging test using positron emission tomography (PET) with iodine-124 to measure radioactive iodine uptake in metastatic thyroid carcinoma. If the test indicates sufficient uptake, standard treatment with radioiodine will continue; if not, alternative therapies may be considered. The study aims to improve treatment decisions for patients with thyroid cancer by providing more accurate dosimetry information. Participants will undergo PET/CT scans to assess their condition before therapy.

Who should consider this trial

Good fit: Ideal candidates include adults with confirmed metastatic thyroid carcinoma who have undergone total thyroidectomy and are planning to receive radioiodine therapy.

Not a fit: Patients under 18 years old or those who are pregnant will not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to more personalized and effective treatment strategies for patients with metastatic thyroid carcinoma.

How similar studies have performed: Other studies using similar imaging techniques have shown promise, but this specific approach with iodine-124 is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adults with thyroid carcinoma confirmed by pathology.
* Adult thyroid carcinoma patients who have undergone total thyroidectomy
* Adult thyroid carcinoma patients have metastatic disease or suspicion for metastatic disease, or are under a protocol intended to explore re-induction therapy for 131I uptake, and are about to undergo Thyrogen-assisted dosimetry, unless Thyrogen-assisted dosimetry is not required per standard of care.
* The patient and physician are planning to administer 131I for therapy if persistent radioiodine-avid metastases are present.
* All subjects must have measurable disease, documented within the previous six months by ultrasonography (US), MRI, FDG PET/CT, or CT scanning.

Exclusion Criteria:

* Age less than 18 years.
* Patients who are pregnant.

Where this trial is running

New York, New York

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Thyroid CarcinomaMetastatic Thyroid CarcinomaIodine-124PET Scan18-253
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.