Post-Y90 PET Dosimetry

Area of Science:

• Nuclear medicine
• Oncology
• Radiology

Background:

• Transarterial radioembolization with yttrium-90 (Y-90 TARE) is a standard treatment for unresectable liver cancer.
• Current post-treatment imaging often uses SPECT/CT, which has limitations in image quality.

Purpose of the Study:

• To evaluate the effectiveness of advanced imaging techniques for Y-90 TARE.
• To highlight the benefits of PET-based imaging for personalized dosimetry and treatment response assessment.

Main Methods:

• Comparison of imaging modalities including SPECT/CT, PET/CT, and PET/MR for Y-90 TARE.
• Assessment of image quality, dose quantification accuracy, and correlation with treatment outcomes.

Main Results:

• PET/CT and PET/MR imaging provide higher signal-to-noise ratio and spatial resolution compared to SPECT.
• Improved image clarity facilitates accurate radiation dose quantification and correlation with treatment response.

Conclusions:

• PET-based imaging offers superior image quality for Y-90 TARE, enabling more precise personalized dosimetry.
• Wider adoption of PET imaging is recommended to refine dose-response and dose-toxicity relationships, despite current availability challenges.