Refereed journal article or data article (A1)

Effect of respiratory motion correction and CT-based attenuation correction on dual-gated cardiac PET image quality and quantification




List of Authors: Schultz Jussi, Siekkinen Reetta, Jafari Tadi Mojtaba, Teräs Mika, Klén Riku, Lehtonen Eero, Saraste Antti, Teuho Jarmo

Publisher: Springer

Publication year: 2021

Journal: Journal of Nuclear Cardiology

Journal name in source: JOURNAL OF NUCLEAR CARDIOLOGY

Journal acronym: J NUCL CARDIOL

Number of pages: 11

ISSN: 1071-3581

eISSN: 1532-6551

DOI: http://dx.doi.org/10.1007/s12350-021-02769-6

URL: https://link.springer.com/article/10.1007/s12350-021-02769-6

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/67224956


Abstract

Background.

Dual-gating reduces respiratory and cardiac motion effects but increases noise. With motion correction, motion is minimized and image quality preserved. We applied motion correction to create end-diastolic respiratory motion corrected images from dual-gated images.

Methods.

[F-18]-fluorodeoxyglucose ([F-18]-FDG) PET images of 13 subjects were reconstructed with 4 methods: non-gated, dual-gated, motion corrected, and motion corrected with 4D-CT (MoCo-4D). Image quality was evaluated using standardized uptake values, contrast ratio, signal-to-noise ratio, coefficient of variation, and contrast-to-noise ratio. Motion minimization was evaluated using myocardial wall thickness.

Results.

MoCo-4D showed improvement for contrast ratio (2.83 vs 2.76), signal-to-noise ratio (27.5 vs 20.3) and contrast-to-noise ratio (14.5 vs 11.1) compared to dual-gating. The uptake difference between MoCo-4D and non-gated images was non-significant (P > .05) for the myocardium (2.06 vs 2.15 g/mL), but significant (P < .05) for the blood pool (.80 vs .86 g/mL). Non-gated images had the lowest coefficient of variation (27.3%), with significant increase for all other methods (31.6-32.5%). MoCo-4D showed smallest myocardial wall thickness (16.6 mm) with significant decrease compared to non-gated images (20.9 mm).

Conclusions.

End-diastolic respiratory motion correction and 4D-CT resulted in improved motion minimization and image quality over standard dual-gating.


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Last updated on 2022-07-04 at 16:20