A practical method of I-131 thyroid cancer therapy dose optimization using estimated effective renal clearance

Area of Science:

• Nuclear medicine
• Oncology
• Nephrology

Background:

• Thyroid cancer treatment often involves radioactive iodine (I-131) therapy.
• Maximizing I-131 efficacy while minimizing toxicity is crucial, especially in patients with renal impairment.
• Bone marrow and lung damage are significant concerns in I-131 therapy.

Observation:

• A modified Benua and Leeper method was employed for dose calculation.
• Effective renal clearance of I-123 was used as a surrogate marker.
• Two whole-body I-123 scans at 0 and 24 hours post-administration informed the calculation.

Findings:

• A web-based calculator was developed to determine the maximum safe I-131 dose.
• The calculator accounts for individual patient factors, particularly renal function.
• This approach aims to reduce the risk of I-131-induced bone marrow and lung toxicity.

Implications:

• Improved patient outcomes in radioactive iodine therapy for thyroid cancer.
• Personalized dosimetry for I-131 treatment in complex patient cases.
• Potential for wider adoption of risk-stratified I-131 dosing protocols.