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Erschienen in: The International Journal of Cardiovascular Imaging 4/2013

01.04.2013 | Original Paper

The feasibility of halfcycle reconstruction in high heart rates in coronary CT angiography using 320-row CT

verfasst von: Nobuo Tomizawa, Kodai Yamamoto, Masaaki Akahane, Rumiko Torigoe, Shigeru Kiryu, Kuni Ohtomo

Erschienen in: The International Journal of Cardiovascular Imaging | Ausgabe 4/2013

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Abstract

Our aim was to investigate when halfcycle reconstruction (HCR) was feasible in patients who were predicted to have a heart rate over 65 bpm in coronary CT angiography (CTA) using 320-row CT. Seventy-four patients who underwent multiple heart beat scanning were included. The time to reach 230 HU at the ascending aorta during the bolus tracking scan was recorded (T230). HCR image and multicycle reconstruction (MCR) image were reconstructed for each patient. Image quality for each coronary segment was rated on a 3-point scale (3: good, 1: poor). For each patient, we determined that a single beat acquisition was feasible for diagnosis (HCR group) when the number of segments graded score 1 in the HCR image was the same or less than that in the MCR image. Otherwise, we included the patients in the MCR group. HCR group and MCR group included 38 and 36 patients, respectively. Regression analysis showed that body height >1.66 m (odds ratio (OR), 5.74; CI 1.59–25.6; p < 0.007), T230 >16 s (OR 3.11; CI 1.07–9.58; p = 0.04), and heart rate ≤72 bpm (OR 3.18; CI 1.11–9.49; p = 0.03) were related with the HCR group. When all three criteria were fulfilled, the calculated probability that MCR would improve image quality was only 7 %. When the heart rate is ≤72 bpm, single heart beat acquisition is feasible for patients with body height >1.66 m and T230 > 16 s in coronary CTA using 320-row CT.
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Metadaten
Titel
The feasibility of halfcycle reconstruction in high heart rates in coronary CT angiography using 320-row CT
verfasst von
Nobuo Tomizawa
Kodai Yamamoto
Masaaki Akahane
Rumiko Torigoe
Shigeru Kiryu
Kuni Ohtomo
Publikationsdatum
01.04.2013
Verlag
Springer Netherlands
Erschienen in
The International Journal of Cardiovascular Imaging / Ausgabe 4/2013
Print ISSN: 1569-5794
Elektronische ISSN: 1875-8312
DOI
https://doi.org/10.1007/s10554-012-0151-0

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