Abstract
Background
Although N13-ammonia has favorable properties among FDA approved radiotracers, complexity of implementation has limited its use. We describe the initial patient experience of N13-ammonia PET imaging using a compact N13-ammonia production system.
Methods
N13 was produced using the ION-12SC, a 12MeV, 10uA superconducting minimally shielded cyclotron, and reduced to N13-ammonia in an automated multi-use purification unit. Patients were power injected with 9.3 ± 1.1 mCi (344.1 ± 40.7 MBq) of N13-ammonia for rest imaging, and 18.8 ± 0.9 mCi (695.6 ± 33.3 MBq) of N13-ammonia was injected at peak hyperemia for stress testing. Images were interpreted for relative perfusion, left ventricular volumes/function, blood flow quantification, and scored for image quality.
Results
In total 97 patients underwent 98 N13-ammonia PET scans (32 rest only/65 rest-stress/1 stress only). Image quality was 91.8% good or excellent. None were poor/non-diagnostic. Study durations were acceptable. Tracer related radiation dosimetry to patients was 0.7 ± 0.1 mSv (rest only), and 2.1 ± 0.1 mSv (rest-stress).
Conclusion
Clinical N13-ammonia production by the Ionetix ION-12SC delivers high quality myocardial PET perfusion images in a rapid protocol.
References
Danad I, Raijmakers PG, Driessen RS, Leipsic J, Raju R, Naoum C, et al. Comparison of coronary CT angiography, SPECT, PET, and hybrid imaging for diagnosis of ischemic heart disease determined by fractional flow reserve. JAMA Cardiol. 2017;2:1100–7.
Bateman T, Dilsizian V, Beanlands R, Depuey G, Heller G, Wolinsky D. American Society of Nuclear Cardiology and Society of Nuclear Medicine and Molecular Imaging joint position statement on the clinical indications for myocardial perfusion PET. J Nucl Med. 2016;57:1654–6.
Murthy V, Bateman T, Beanlands R, Berman D, Bortes-Neto S, Chareonthaitawee P. Clinical quantification of myocardial blood flow using PET: Joint position paper of the SNMMI Cardiovascular Council and the ASNC. J Nucl Med. 2018;59:273–93.
Herzog BA, Husmann L, Valenta I, Gaemperli O, Siegrist PT, Tay FM, et al. Long-term prognostic value of 13N-ammonia myocardial perfusion positron emission tomography added value of coronary flow reserve. J Am Coll Cardiol. 2009;54:150–6.
Fiechter M, Ghadri JR, Gebhard C, Fuchs TA, Pazhenkottil AP, Nkoulou RN, et al. Diagnostic value of 13N-ammonia myocardial perfusion PET: added value of myocardial flow reserve. J Nucl Med. 2012;53:1230–4.
Maddahi J, Packard RR. Cardiac PET perfusion tracers: current status and future directions. Semin Nucl Med. 2014;44:333–43.
International Commission on Radiological Protection. Radiation dose to patients from radiopharmaceuticals. ICRP Publication 80. Ann ICRP 2000;28:113.
Tamaki N, Yonekura Y, Senda M, Kureshi SA, Saji H, Kodama S, et al. Myocardial positron computed tomography with 13N-ammonia at rest and during exercise. Eur J Nucl Med Mol Imaging. 1985;11:246–51.
Stabin MG. Radiopharmaceuticals for nuclear cardiology: Radiation dosimetry, uncertainties, and risk. J Nucl Med. 2008 Sep;49:1555–63.
Disclosures
Justin Pieper, Vaiibhav N. Patel, Sylvia Escolero, Jacob R. Nelson, David Hubers, Jill Rothley, and Richard L. Weinberg have no disclosures or conflicts of interest related to this publication. Edward P. Ficaro and James R. Corbett have financial interest in INVIA Medical Imaging Solutions, which licenses the commercial software used for imaging processing. Alexis Poitrasson-Rivière is employed by INVIA. INVIA Medical Imaging Solutions did not provide direct support to this study. Joseph Oliverio, Christopher K. Shreves, and Nick Freiburger own stock options and are employed by Ionetix Corporation. Venkatesh L. Murthy has received consulting fees and stock options from Ionetix, Inc., owns stock in General Electric and Cardinal Health, has a research Grant from Siemens Medical Imaging, and has provided expert witness testimony on behalf of Jubilant Draximage. Venkatesh L. Murthy is supported by 1R01HL136685 from the National, Heart, Lung, Blood Institute and 1R01AG059729 from the National Institute on Aging.
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Pieper, J., Patel, V.N., Escolero, S. et al. Initial clinical experience of N13-ammonia myocardial perfusion PET/CT using a compact superconducting production system. J. Nucl. Cardiol. 28, 295–299 (2021). https://doi.org/10.1007/s12350-019-01886-7
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DOI: https://doi.org/10.1007/s12350-019-01886-7