Abstract
Objective
To review the technical feasibility of resin microsphere (SIR-Spheres®) yttrium-90 radioembolization prescribed using the medical internal radiation dose (MIRD) model.
Methods
All radioembolization procedures for hepatic malignancies using resin microspheres with MIRD model between November 2015 and February 2019 were included in this IRB-approved study (n = 60). Student’s T test was used to compare prescribed activity based on MIRD and BSA models. Adverse events were assessed immediately, 30 days, and 6 months post-treatment.
Results
Sixty radioembolizations were performed in 54 patients (age 68 ± 9 years, 48–87 years, 35% female). Mean prescribed activity calculated by the MIRD model (target absorbed dose 120–200 Gy for primary and 80–200 Gy for metastatic liver cancers) was 1.7 GBq (0.3–6.4) compared with 0.6 GBq (0.12–2.1) if BSA had been used (p < 0.0001). The prescribed activity was successfully delivered in 93% (56/60) treatments. Prophylactic embolization and anti-reflux catheters were used in 20% (12/60) and 5% (3/60) treatments, respectively. No immediate post-procedural complications occurred. Abdominal pain was the most common clinical Grade 3 CTCAE in 30 days (10%) and 6 months (12%). Radiation pneumonitis occurred in 3 (5%) patients but no radiation-induced gastric ulcer or radiation-induced liver disease occurred.
Conclusion
MIRD dosimetry results in higher prescribed activity compared with BSA dosimetry with resin microspheres. MIRD prescribed activity with target absorbed doses up to 200 Gy can be successfully administered without prophylactic embolization in selected patients.
Key Points
•MIRD dosimetry results in higher prescribed activity compared with BSA dosimetry for radioembolization.
•MIRD dosimetry can be used for yttrium-90 resin microsphere radioembolization with acceptable safety profile.
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Abbreviations
- 3D:
-
3 Dimensional
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- BSA:
-
Body surface area
- CT:
-
Computed tomography
- CTCAE:
-
Common Terminology Criteria for Adverse Events
- ECOG:
-
Eastern Cooperative Oncology Group Performance Status
- HCC:
-
Hepatocellular carcinoma
- MIRD:
-
Medical Internal Radiation Dose
- TACE:
-
Transarterial chemoembolization
- TARE:
-
Transarterial radioembolization
- Tc-99m MAA:
-
Technetium 99m macroaggregated albumin
- Y-90:
-
Yttrium-90
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Acknowledgments
This study was funded by Sirtex Medical Inc.
Funding
This study was funded by Sirtex Medical Inc. Woburn MA. The funding supported research personnel performing data collection and data analysis for this project. The funding source had no role in the design of the study and no personnel from the funding source had involvement in data collection, analysis, interpretation of the data, or writing of the manuscript.
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The scientific guarantor of this publication is Ammar Sarwar (Author).
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Ammar Sarwar (Author) has received research grants from Sirtex Medical Inc. and is a consultant for the company. None of the other authors have a conflict of interest relevant to this publication.
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Sarwar, A., Kudla, A., Weinstein, J.L. et al. Yttrium-90 radioembolization using MIRD dosimetry with resin microspheres. Eur Radiol 31, 1316–1324 (2021). https://doi.org/10.1007/s00330-020-07231-8
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DOI: https://doi.org/10.1007/s00330-020-07231-8