Document Type : Original Paper
Physics Department, University of Trieste, Italy
Academic hospital of Udine
Physics,Faculty of sciences, University Mohammed V Rabat
Physics, faculty of sciences, University Mohammed V Rabt
Departement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat, Kingdom of Morocco
In Yttrium-90 SPECT imaging, the energy window and collimator used during acquisition can have a major effect on image quality. In this work, we used a new and independent method to verify the prevoius results suggest different energy ranges, but all centered at 130 keV.
Materials and method:
We used Siemens Symbia SPECT-CT system fitted with High Energy General Purpose (HEGP), Medium Energy General Purpose (MEGP) and Low Energy High Resolution (LEHR) to acquire data from NEMA IEC PET Body Phantom with its 6 different spheres of 3.7, 2.8, 2.2, 1.7, 1.3, 1.0 cm diameter.
HEGP collimator is the most suitable for acquisitions of 90Y bremsstrahlung radiation from the point of view of the correct volume reproduction.
For the bigger sphere’s study, the optimum ISO-counting curves is related to the energy range centred in 130 keV.
The results obtained are consistent with previous studies. The Iso Counting Curves method can help to improve image quality.