Activity regimes for 82Rb cardiac PET: Effects on absolute MBF and MPI
| Autor: | Nana L Christensen, Kirsten Bouchelouche, Camilla Molich Hoff, Jens Nørkær Sørensen, Lars Poulsen Tolbod |
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| Rok vydání: | 2020 |
| Předmět: |
Coronary Circulation/physiology
ACCURACY 030204 cardiovascular system & hematology myocardial blood flow 030218 nuclear medicine & medical imaging 03 medical and health sciences Myocardial perfusion imaging 0302 clinical medicine image analysis Positron Emission Tomography Computed Tomography TRACER PERFUSION Linear regression Prescribing information medicine Humans Radiology Nuclear Medicine and imaging instrumentation Ejection fraction MYOCARDIAL BLOOD-FLOW medicine.diagnostic_test business.industry RB-82 PET Blood flow QUANTIFICATION Positron-Emission Tomography/methods Myocardial Perfusion Imaging/methods PET Cardiac PET MPI Cardiology and Cardiovascular Medicine Nuclear medicine business Rubidium Radioisotopes Perfusion Coronary Artery Disease/diagnostic imaging |
| Zdroj: | Hoff, C M, Sørensen, J, Christensen, N L, Bouchelouche, K & Tolbod, L P 2022, ' Activity regimes for 82Rb cardiac PET : Effects on absolute MBF and MPI. ', Journal of Nuclear Cardiology, vol. 29, no. 2, pp. 449–460 . https://doi.org/10.1007/s12350-020-02266-2 |
| ISSN: | 1532-6551 1071-3581 |
| DOI: | 10.1007/s12350-020-02266-2 |
| Popis: | Background: Selection of optimal tracer activity for 82Rb PET is based on a trade-off between necessary count-statistics in the late static phase and detector saturation in the early blood-pool phase. Administered tracer activity recommended in prescribing information differs substantially from recommendations in current literature. The present study examines the effect on both absolute myocardial blood flow (MBF), myocardial flow reserve (MFR) and relative myocardial perfusion imaging (MPI) of reducing dose.Methods: Forty patients were scanned twice on a PMT-based PET/CT (GE D690): At recommended activity (1110 MBq) and at either 740 or 370 MBq. MBF, MFR, total perfusion deficit (TPD) and ejection fractions (EF) were quantified. Results were compared using linear regression and Bland–Altman plots.Results: Linear correlation between MBF at 1110 MBq at either reduced activity had an R2 > 0.98. A small bias (± 5%-9%) was observed with opposite signs for 1110/740 and 1110/370. Limits of agreement for MBF were larger for 1110/370. MFR had a lower linear correlation (R2 = 0.96), but wide limits of agreement especially for 1110/370. TPD and EF correlated well at 1110/740 (R2 = 0.96 and 0.99, respectively), but large scatter was observed for 1110/370.Conclusion: Reduction of the tracer activity to 740 MBq, significantly reduced dead-time correction factors, while still producing reliable static and gated images. However, despite large dead-time at 1110 MBq, no systematic bias on absolute MBF was observed compared to reduced activities. |
| Databáze: | OpenAIRE |
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