Refine
Has Fulltext
- yes (83)
Is part of the Bibliography
- yes (83)
Year of publication
Document Type
- Journal article (68)
- Conference Proceeding (9)
- Preprint (6)
Keywords
- PET (24)
- Positronen-Emissions-Tomografie (21)
- positron emission tomography (15)
- prostate cancer (13)
- theranostics (13)
- PRRT (8)
- neuroendocrine tumor (8)
- PET/CT (7)
- PSMA (7)
- radioligand therapy (7)
Institute
- Klinik und Poliklinik für Nuklearmedizin (80)
- Medizinische Klinik und Poliklinik I (13)
- Medizinische Klinik und Poliklinik II (11)
- Deutsches Zentrum für Herzinsuffizienz (DZHI) (8)
- Urologische Klinik und Poliklinik (8)
- Institut für Anatomie und Zellbiologie (4)
- Institut für Pharmazie und Lebensmittelchemie (4)
- Comprehensive Cancer Center Mainfranken (3)
- Pathologisches Institut (3)
- Institut für Klinische Biochemie und Pathobiochemie (2)
Sonstige beteiligte Institutionen
- Johns Hopkins School of Medicine (18)
- Johns Hopkins University School of Medicine (5)
- Johns Hopkins School of Medicine, Baltimore, MD, U.S. (4)
- Department of Biomedical Imaging, National Cerebral and Cardiovascular Research Center, Suita, Japan (2)
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, Suita Japan (2)
- Institut for Molecular Biology and CMBI, Department of Genomics, Stem Cell Biology and Regenerative Medicine, Leopold-Franzens-University Innsbruck, Innsbruck, Austria (2)
- Johns Hopkins School of Medicine, The Russell H Morgan Department of Radiology and Radiological Science, Baltimore, MD, USA (2)
- Department of Nuclear Medicine, Kanazawa University (1)
- Hospital Augsburg, Augsburg, Germany (1)
- Johns Hopkins Medicine (1)
EU-Project number / Contract (GA) number
- 701983 (39)
We aimed to explore the impact of ageing on 11C-Hydroxyephedrine (11C-HED) uptake in the healthy rat heart in a longitudinal setting. To investigate a potential cold mass effect, the influence of specific activity on cardiac 11C-HED uptake was evaluated: 11C-HED was synthesized by N-methylation of (−)-metaraminol as the free base (radiochemical purity >95%) and a wide range of specific activities (0.2–141.9 GBq/μmol) were prepared. \(^{11}\)C-HED (48.7±9.7MBq, ranged 0.2–60.4μg/kg cold mass) was injected in healthy Wistar Rats. Dynamic 23-frame PET images were obtained over 30 min. Time activity curves were generated for the blood input function and myocardial tissue. Cardiac 11C-HED retention index (%/min) was calculated as myocardial tissue activity at 20-30 min divided by the integral of the blood activity curves. Additionally, the impact of ageing on myocardial 11CHED uptake was investigated longitudinally by PET studies at different ages of healthy Wistar Rats. A dose-dependent reduction of cardiac 11C-HED uptake was observed: The estimated retention index as a marker of norepinephrine function decreased at a lower specific activity (higher amount of cold mass). This observed high affinity of 11C-HED to the neural norepinephrine transporter triggered a subsequent study: In a longitudinal setting, the 11C-HED retention index decreased with increasing age. An age-related decline of cardiac sympathetic innervation could be demonstrated. The herein observed cold mass effect might increase in succeeding scans and therefore, 11C-HED microPET studies should be planned with extreme caution if one single radiosynthesis is scheduled for multiple animals.