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Analytical quantification of aortic valve 18F-sodium fluoride PET uptake

  • Daniele Massera
  • Mhairi K. Doris
  • Sebastien Cadet
  • Jacek Kwiecinski
  • Tania A. Pawade
  • Frederique E. C. M. Peeters
  • Damini Dey
  • David E. Newby
  • Marc R. Dweck
  • Piotr J. SlomkaEmail author
Original Article

Abstract

Background

Challenges to cardiac PET-CT include patient motion, prolonged image acquisition and a reduction of counts due to gating. We compared two analytical tools, FusionQuant and OsiriX, for quantification of gated cardiac 18F-sodium fluoride (18F-fluoride) PET-CT imaging.

Methods

Twenty-seven patients with aortic stenosis were included, 15 of whom underwent repeated imaging 4 weeks apart. Agreement between analytical tools and scan-rescan reproducibility was determined using the Bland–Altman method and Lin’s concordance correlation coefficients (CCC).

Results

Image analysis was faster with FusionQuant [median time (IQR) 7:10 (6:40-8:20) minutes] compared with OsiriX [8:30 (8:00-10:10) minutes, p = .002]. Agreement of uptake measurements between programs was excellent, CCC = 0.972 (95% CI 0.949-0.995) for mean tissue-to-background ratio (TBRmean) and 0.981 (95% CI 0.965-0.997) for maximum tissue-to-background ratio (TBRmax). Mean noise decreased from 11.7% in the diastolic gate to 6.7% in motion-corrected images (p = .002); SNR increased from 25.41 to 41.13 (p = .0001). Aortic valve scan-rescan reproducibility for TBRmax was improved with FusionQuant using motion correction compared to OsiriX (error ± 36% vs ± 13%, p < .001) while reproducibility for TBRmean was similar (± 10% vs ± 8% p = .252).

Conclusion

18F-fluoride PET quantification with FusionQuant and OsiriX is comparable. FusionQuant with motion correction offers advantages with respect to analysis time and reproducibility of TBRmax values.

Keywords

Positron emission tomography cardiac motion computed tomography valvular disease 

Abbreviations

PET

Positron emission tomography

CT

Computed tomography

ECG

Electrocardiogram

ROI

Region of interest

SNR

Signal-to-noise ratio

TBR

Tissue-to-background ratio

SUV

Standardized uptake value

Notes

Disclosure

The authors have indicated that they have no financial conflict of interest.

Author contribution

DM, MKD, JK, DD, DEN, MRD, and PJS participated in conception and design of the study; DM, MKD, SC, JK, TAP, and FECMP were actively involved in collecting data and data analysis; DM, MRK, and PJS drafted the manuscript; all authors gave final approval of the submitted manuscript.

Supplementary material

12350_2018_1542_MOESM1_ESM.pptx (10.8 mb)
Supplementary material 1 (PPTX 11046 kb)

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Copyright information

© American Society of Nuclear Cardiology 2018

Authors and Affiliations

  • Daniele Massera
    • 1
  • Mhairi K. Doris
    • 2
  • Sebastien Cadet
    • 3
  • Jacek Kwiecinski
    • 2
    • 3
  • Tania A. Pawade
    • 2
  • Frederique E. C. M. Peeters
    • 4
  • Damini Dey
    • 3
  • David E. Newby
    • 2
  • Marc R. Dweck
    • 2
  • Piotr J. Slomka
    • 3
    Email author
  1. 1.Leon H. Charney Division of CardiologyNew York University School of MedicineNew YorkUSA
  2. 2.BHF Centre for Cardiovascular Science, Clinical Research Imaging Centre, Edinburgh Heart CentreUniversity of EdinburghEdinburghScotland, UK
  3. 3.Department of Imaging, Medicine and Biomedical SciencesCedars-Sinai Medical CenterLos AngelesUSA
  4. 4.Department of CardiologyMaastricht University Medical CenterMaastrichtThe Netherlands

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