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Published in: Journal of Nuclear Cardiology 6/2019

01-12-2019 | Original Article

Dosimetry, biodistribution, and safety of flurpiridaz F 18 in healthy subjects undergoing rest and exercise or pharmacological stress PET myocardial perfusion imaging

Authors: Jamshid Maddahi, MD, FACC, FASNC, Frank Bengel, MD, Johannes Czernin, MD, Paul Crane, PhD, Magnus Dahlbom, PhD, Heinrich Schelbert, MD, PhD, Richard Sparks, PhD, Michael Phelps, PhD, Joel Lazewatsky, PhD

Published in: Journal of Nuclear Cardiology | Issue 6/2019

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Abstract

The objectives of this study were to evaluate radiation dosimetry, biodistribution, human safety, and tolerability of 18F-labeled flurpiridaz (Flurpiridaz) in normal subjects undergoing rest and separate-day exercise or adenosine pharmacological stress PET imaging.

Methods

12 normal subjects were injected with 58.5 to 121 MBq (1.58 to 3.27 mCi) of Flurpiridaz intravenously at rest on Day 1 and 57 to 171 MBq (1.54 to 4.61 mCi) during stress on Day 2. Sequential whole-body imaging was performed for 5 hours. Blood samples were collected for up to 8 hours.

Results

The heart wall received the largest mean absorbed dose with both exercise and adenosine stresses. The mean effective dose was 0.054 rem/mCi (0.015 mSv/MBq) with exercise and 0.069 rem/mCi (0.019 mSv/MBq) with adenosine pharmacological stress. The maximum dose that may be administered without exceeding 1 rem (10 mSv) effective dose was 19 mCi (685 MBq) for exercise and 15 mCi (539 MBq) for adenosine pharmacological stress. There were no drug-related adverse events, and the tracer was well tolerated in all subjects.

Conclusion

Based on radiation dosimetry, biodistribution, and safety observations, 18F-labeled flurpiridaz is found suitable for clinical PET myocardial perfusion imaging in conjunction with either exercise or pharmacological stress testing.
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Metadata
Title
Dosimetry, biodistribution, and safety of flurpiridaz F 18 in healthy subjects undergoing rest and exercise or pharmacological stress PET myocardial perfusion imaging
Authors
Jamshid Maddahi, MD, FACC, FASNC
Frank Bengel, MD
Johannes Czernin, MD
Paul Crane, PhD
Magnus Dahlbom, PhD
Heinrich Schelbert, MD, PhD
Richard Sparks, PhD
Michael Phelps, PhD
Joel Lazewatsky, PhD
Publication date
01-12-2019
Publisher
Springer International Publishing
Published in
Journal of Nuclear Cardiology / Issue 6/2019
Print ISSN: 1071-3581
Electronic ISSN: 1532-6551
DOI
https://doi.org/10.1007/s12350-018-01484-z

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