PET/CT calibration for post-treatment standard body scan acquisition with yttrium-90 resin micro-SPHERES
J A Uña-Gorospe1, C Baso-Pérez2, C Cárdenas-Negro1
1Nuclear Medicine Department, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Islas Canarias, Spain.
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.
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