Calibración de PET/TC para adquisición de estudio de cuerpo estándar postratamiento con esferas de resina de ytrio-90 / PET/CT calibration for post-treatment standard body scan acquisition with yttrium-90 Resin Micro-SPHERES

Introducción Entre los objetivos en los tratamientos con esferas marcadas con ytrio-90 figura demostrar que se consigue la dosis tumoricida y que se evitan dosis hepatotóxicas, así como que no existe deposición extrahepática. Material y métodos Utilizamos diferentes cantidades de ytrio y un maniquí NEMA NU2-2007 para comprobar si el tomógrafo mantiene una respuesta que permita hacer cálculos dosimétricos reales. Resultados El tomógrafo Gemini responde de manera lineal en un rango amplio de actividades con una R2=0,9983. Conclusión La capacidad de detección del equipo PET nos permite realizar estudios de cuerpo estándar con finalidad dosimétrica con tiempos de 5min por BED, que además hacen posible verificar la ausencia de deposición extrahepática de cantidades significativas de esferas de ytrio-90 (AU)

Introduction Among the objectives in treatments with yttrium-90 spheres is to demonstrate that the tumoricidal dose is achieved and that hepatotoxic doses are avoided, as well as that there is no extrahepatic deposition. Material and methods We use different amounts of yttrium-90 resin micro-spheres and a NEMA NU2-2007 phantom to check if the scanner maintains a response that allows real dosimetric calculations. Results The Gemini tomograph responds linearly in a wide range of activities with R2=0.9983. Conclusion The detection capacity of the PET equipment allows us to carry out standard body studies with dosimetric purposes with times of five minutes per BED. It also make possible to verify the absence of extrahepatic deposition of significant amounts of yttrium 90 spheres (AU)

PET/CT calibration for post-treatment standard body scan acquisition with yttrium-90 resin micro-SPHERES.

INTRODUCTION: Among the objectives in treatments with yttrium-90 spheres, is to demonstrate that the tumoricidal dose is achieved and that hepatotoxic doses are avoided, as well as that there is no extrahepatic deposition. MATERIAL AND METHODS: We use different amounts of yttrium-90 resin micro-spheres and a NEMA NU2-2007 phantom to check if the scanner maintains a response that allows real dosimetric calculations. RESULTS: The Gemini tomograph responds linearly in a wide range of activities with R2 = 0.9983. CONCLUSION: The detection capacity of the PET equipment allows us to carry out standard body studies with dosimetric purposes with times of five minutes per bed. It also make possible to verify the absence of extrahepatic deposition of significant amounts of yttrium 90 spheres.