Impact of a new motion-correction algorithm on image quality of low-dose coronary CT angiography in patients with insufficient heart rate control

Academic Radiology
Tobias A FuchsPhilipp A Kaufmann

Abstract

Prospective electrocardiogram (ECG) triggering allows coronary computed tomography angiography (CCTA) scanning with low radiation dose but requires heart rates below 63 beats/min. We assessed the impact of a novel vendor-specific motion-correction algorithm on image quality and interpretability of low-dose CCTA acquired despite insufficient heart rate control. In 40 patients undergoing CCTA for the assessment of known or suspected coronary artery disease who did not reach the target heart rate below 63 beats/min despite β-blockade before prospective low-dose scanning, the temporal acquisition window was increased (80 ms additional padding). The new algorithm detects and integrates vessel path and velocity from adjacent cardiac phases for motion correction. Two blinded observers assessed image quality on a 4-point Likert scale (1, nonevaluative; 2, reduced but evaluative; 3, good; and 4, excellent) and the fraction of interpretable segments (score 2 or more) using motion correction versus standard reconstruction. Image reconstruction with motion correction resulted in an increased median coronary artery image quality score (excellent interobserver agreement, κ = 0.85) compared to standard reconstruction (3.4 vs. 3.0, P < .001). ...Continue Reading

References

May 22, 2008·AJR. American Journal of Roentgenology·Sebastian LeschkaHatem Alkadhi
Feb 24, 2009·AJR. American Journal of Roentgenology·Fuminari TatsugamiPhilipp A Kaufmann
Jul 25, 2012·The International Journal of Cardiovascular Imaging·Egle KazakauskaitePhilipp A Kaufmann
Oct 12, 2012·The International Journal of Cardiovascular Imaging·Tobias A FuchsPhilipp A Kaufmann

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Citations

Feb 19, 2016·Journal of X-ray Science and Technology·Paul FitzGeraldBruno De Man
Mar 3, 2015·Radiologic Clinics of North America·Thomas G FlohrFelix G Meinel
May 4, 2016·Expert Review of Medical Devices·Ayaz AghayevMichael Steigner
Jul 12, 2018·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Frithjof Kruggel

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