Validation of a Rawdata-based Synchronization Signal (Kymogram) for a Phase-Correlated Cardiac Image Reconstruction

Journal article


Publication Details

Author(s): Ertel D, Pflederer T, Achenbach S, Kachelrieß M, Steffen P, Kalender WA
Journal: European Radiology
Publication year: 2006
Volume: 18
Journal issue: 2
Pages range: 253-262
ISSN: 0938-7994
Language: English


Abstract

Phase-correlated reconstruction is commonly used in computed tomography
(CT)-based cardiac imaging. Alternatively to the commonly used ECG, the
raw data-based kymogram function can be used as a synchronization
signal. We used raw data of 100 consecutive patient exams to compare the
performance of kymogram function to the ECG signal. For objective
validation the correlation of the ECG and the kymogram was assessed.
Additionally, we performed a double-blinded comparison of ECG-based and
kymogram-based phase-correlated images. The two synchronization signals
showed good correlation indicated by a mean difference in the detected
heart rate of negligible 0.2 bpm. The mean image quality score was 2.0
points for kymogram-correlated images and 2.3 points for ECG-correlated
images, respectively (3: best; 0: worst). The kymogram and the ECG
provided images adequate for diagnosis for 93 and 97 patients,
respectively. For 50% of the datasets the kymogram provided an
equivalent or even higher image quality compared with the ECG signal. We
conclude that an acceptable image quality can be assured in most cases
by the kymogram. Improvements of image quality by the kymogram function
were observed in a noticeable number of cases. The kymogram can serve as
a backup solution when an ECG is not available or lacking in quality. © European Society of Radiology 2007


How to cite

APA:
Ertel, D., Pflederer, T., Achenbach, S., Kachelrieß, M., Steffen, P., & Kalender, W.A. (2006). Validation of a Rawdata-based Synchronization Signal (Kymogram) for a Phase-Correlated Cardiac Image Reconstruction. European Radiology, 18(2), 253-262. https://dx.doi.org/10.1007/s00330-007-0752-5

MLA:
Ertel, D., et al. "Validation of a Rawdata-based Synchronization Signal (Kymogram) for a Phase-Correlated Cardiac Image Reconstruction." European Radiology 18.2 (2006): 253-262.

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Last updated on 2019-02-06 at 20:10