Measuring the actual I-131 thyroid uptake curve with a collar detector system: a feasibility study

Area of Science:

• Nuclear Medicine
• Medical Physics
• Endocrinology

Background:

• Radioiodine therapy with I-131 is standard for benign thyroid diseases.
• Current dosimetry relies on assumed iodine biological half-life, ignoring individual variations.
• Accurate biological half-life data is crucial for precise radiation dose calculation and therapy outcome assessment.

Purpose of the Study:

• To assess the feasibility of a novel wearable device, the Collar Therapy Indicator (CoTI), for measuring I-131 uptake curves.
• To evaluate the precision of the CoTI device compared to standard gamma camera measurements.
• To demonstrate the device's capability in capturing dynamic uptake patterns during radioiodine therapy.

Main Methods:

• Development and utilization of the Collar Therapy Indicator (CoTI), a wearable device with dual gamma detectors.
• Comparison of CoTI measurements with gamma camera data to validate system precision.
• Continuous monitoring of I-131 uptake curves over 48 hours in hospitalized patients.

Main Results:

• The CoTI device demonstrated comparable precision to gamma camera measurements for thyroid uptake.
• The device successfully captured detailed I-131 uptake curves over a 48-hour period.
• Feasibility of using the CoTI for real-time uptake monitoring during radioiodine therapy was established.

Conclusions:

• The Collar Therapy Indicator (CoTI) is a feasible and precise tool for measuring I-131 uptake curves in radioiodine therapy.
• This technology has the potential to enhance dosimetry accuracy and personalize treatment for thyroid disorders.
• Further validation could lead to improved patient management and therapeutic outcomes in nuclear medicine.