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• W2950963265 abstract "Clinical practice shows degrading image quality in heavier patients who undergo myocardial perfusion imaging (MPI) with Rubidium-82 (Rb-82) PET when using a fixed tracer activity. Our aim was to derive and validate a patient-specific activity protocol resulting in a constant image quality in PET MPI.We included 251 patients who underwent rest MPI with Rb-82 PET (Discovery 670, GE Healthcare). 132 patients were included retrospectively and were scanned using a fixed activity of 740 MBq. The total number of measured prompts was normalized to activity and correlated to body weight, mass per body length and body mass index to find the best predicting parameter. Next, a patient-specific activity was derived and subsequently validated in 119 additional patients. Image quality was scored by three experts on a four-point scale.Both image quality and prompts decreased in heavier patients when using a fixed activity (p < .005). Body weight was used to derive a new activity formula: Activity = 8.3 MBq/kg. When applying this formula, both measured prompts and scored image quality became independent of body weight (p > .60).Administrating a Rb-82 activity that linearly depends on body weight resulted in a constant image quality across all patients and is recommended." @default.
• W2950963265 created "2019-06-27" @default.
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• W2950963265 date "2019-09-04" @default.
• W2950963265 modified "2023-09-24" @default.
• W2950963265 title "Body weight-dependent Rubidium-82 activity results in constant image quality in myocardial perfusion imaging with PET" @default.
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• W2950963265 doi "https://doi.org/10.1007/s12350-019-01875-w" @default.
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