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A computerized Infusion Pump for control of tissue tracer concentration during Positron Emission Tomography in vivo Pharmacokinetic/Pharmacodynamic measurements
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Oncology, Radiology and Clinical Immunology, Radiology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. (Hammarlund-Udenaes)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical Virology.
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2008 (English)In: BMC Medical Physics, ISSN 1756-6649, Vol. 8, no 2Article in journal (Refereed) Published
Abstract [en]


A computer controlled infusion pump (UIPump) for regulation of target tissue concentration of radioactive compounds was developed for use in biological research and tracer development for PET.


Based on observed tissue or plasma kinetics after a bolus injection of the tracer an algorithm calculates the infusion needed to obtain a specified target kinetic curve. A computer feeds this infusion scheme into an infusion pump connected to an animal via a venous catheter. The concept was validated using [11C]Flumazenil administrated to Sprague-Dawley rats where the whole brain distribution and kinetic of the tracer was measured over time using a microPET-scanner. The accuracy and precision of the system was assessed by producing steady-state levels of the tracer and by mimicking kinetics after oral administration.


Various kinetic profiles could be generated, including rapid achievement of constant levels, or step-wise increased levels. The resulting tissue curves had low deviation from the target curves according to the specified criteria: AUC (%): 4.2 +/- 2.8, Maximal deviation (%): 13.6 +/- 5.0 and R2: 0.95 +/- 0.02.


The UIPump-system is suitable for use in PET-research for assessment of PK/PD properties by simulation of different tracer tissue kinetics in vivo.

Place, publisher, year, edition, pages
2008. Vol. 8, no 2
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-103237DOI: 10.1186/1756-6649-8-2PubMedID: 18513382OAI: oai:DiVA.org:uu-103237DiVA: diva2:217797
Available from: 2009-05-15 Created: 2009-05-15 Last updated: 2012-11-22Bibliographically approved

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Eriksson, OlofSyvänen, StinaLångström, Bengt
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RadiologyDepartment of Pharmaceutical BiosciencesClinical VirologyDepartment of Biochemistry and Organic Chemistry
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