RT Journal Article SR Electronic T1 Assessment of Physiologic Intracranial Calcification in Healthy Adults Using 18F-NaF PET/CT JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 267 OP 271 DO 10.2967/jnumed.118.213678 VO 60 IS 2 A1 Abdullah Al-Zaghal A1 Siavash Mehdizadeh Seraj A1 Thomas J. Werner A1 Oke Gerke A1 Poul F. Høilund-Carlsen A1 Abass Alavi YR 2019 UL http://jnm.snmjournals.org/content/60/2/267.abstract AB The aim of this research study was to determine the role of 18F-sodium fluoride (18F-NaF) PET/CT imaging in the assessment of physiologic molecular calcification in the intracranial structures. We also examined the association of 18F-NaF accumulation with age as well as Hounsfield unit (HU) in certain anatomic sites that are known to calcify with normal aging. Methods: A total of 78 healthy subjects from the Cardiovascular Molecular Calcification Assessed by 18F-NaF PET/CT (CAMONA) clinical trial (38 women and 40 men) were included in this retrospective study. The mean age was 45.28 ± 14.15 y (age range, 21–75 y). SUVmean was used to measure 18F-NaF accumulation in the choroid plexus and epithalamus (pineal gland and habenula). Maximum HU was also measured for each region of interest. Correlation analysis was conducted to assess the association between parameters. Results: Mean SUVmean was 0.42 ± 0.26 in the right choroid plexus, 0.39 ± 25 in the left choroid plexus, and 0.23 ± 0.08 in the epithalamus. Significant positive correlations were present between 18F-NaF uptake and age in the right choroid plexus (r = 0.61, P < 0.0001), left choroid plexus (r = 0.63, P < 0.0001), and epithalamus (r = 0.36, P = 0.001). 18F-NaF uptake significantly correlated with HU in the right choroid plexus (r = 0.52, P < 0.0001), left choroid plexus (r = 0.57, P < 0.0001), and epithalamus (r = 0.25, P = 0.03). Conclusion: 18F-NaF could be used in the assessment of physiologic calcification in several intracranial structures. We report significant associations between 18F-NaF uptake and aging as well as HU in the calcified choroid plexus and epithalamus. Our findings further support the growing interest to use 18F-NaF for detecting extraosseous, molecular calcification, and this powerful probe has potential applications in the evaluation of various age-related, neurodegenerative brain processes.