| Autor: |
Andersen ABA; Department of Nuclear Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls Vej 1, 2730 Herlev, Denmark., Lehel S; Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen, Denmark., Grove EK; Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, 8200 Aarhus, Denmark., Langkjaer N; Department of Nuclear Medicine, Odense University Hospital, 5000 Odense, Denmark., Fuglø D; Department of Nuclear Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls Vej 1, 2730 Herlev, Denmark., Huynh THV; Department of Nuclear Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls Vej 1, 2730 Herlev, Denmark. |
| Abstrakt: |
Alzheimer's disease (AD) is a neurodegenerative disorder with increasing global prevalence and accounts for over half of all dementia cases. Early diagnosis is paramount for not only the management of the disease, but also for the development of new AD treatments. The current golden standard for diagnosis is performed by positron emission tomography (PET) scans with the tracer [ 11 C]Pittsburg Compound B ([ 11 C]PiB), which targets amyloid beta protein (A β ) that builds up as plaques in the brain of AD patients. The increasing demand for AD diagnostics is in turn expected to drive an increase in [ 11 C]PiB-PET scans and the setup of new [ 11 C]PiB production lines at PET centers globally. Here, we present the [ 11 C]PiB production setups, experiences, and use from four Danish PET facilities and discuss the challenges and potential pitfalls of [ 11 C]PiB production. We report on the [ 11 C]PiB production performed with the 6-OH-BTA-0 precursor dissolved in either dry acetone or 2-butanone and by using either [ 11 C]CO 2 or [ 11 C]CH 4 as 11 C- precursors on three different commercial synthesis modules: TracerLab FX C Pro, ScanSys, or TracerMaker. It was found that the [ 11 C]CO 2 method gives the highest radioactive yield (1.5 to 3.2 GBq vs. 0.8 ± 0.3 GBq), while the highest molar activity (98.0 ± 61.4 GBq/μmol vs. 21.2 to 95.6 GBq/μmol) was achieved using [ 11 C]CH 4 . [ 11 C]PiB production with [ 11 C]CO 2 on a TracerLab FX C Pro offered the most desirable results, with the highest yield of 3.17 ± 1.20 GBq and good molar activity of 95.6 ± 44.2 GBq/μmol. Moreover, all reported methods produced [ 11 C]PiB in quantities suitable for clinical applications, thus providing a foundation for other PET facilities seeking to establish their own [ 11 C]PiB production. |
