Automatic electrode and CT/MR image co-localisation for electrocardiographic imaging

Ma, YingLiang ORCID:, Mistry, Umesh, Thorpe, Ashley, Housden, R. James, Chen, Zhong, Schulze, Walther H. W., Rinaldi, C. Aldo, Razavi, Reza and Rhode, Kawal S. (2013) Automatic electrode and CT/MR image co-localisation for electrocardiographic imaging. In: International Conference on Functional Imaging and Modeling of the Heart. Lecture Notes in Computer Science . Springer, pp. 268-275.

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Body surface potential mapping (BSPM) can be used to non-invasively measure the electrical activity of the heart using a dense set of thorax electrodes and a CT/MR scan of the thorax to solve the inverse problem of electrophysiology (ECGi). This technique now shows potential clinical value for the assessment and treatment of patients with arrhythmias. Co-localisation of the electrode positions and the CT/MR thorax scan is essential. This manuscript describes a method to perform the co-localisation using multiple biplane X-ray images. The electrodes are automatically detected and paired in the X-ray images. Then the 3D positions of the electrodes are computed and mapped onto the thorax surface derived from CT/MR. The proposed method is based on a multi-scale blob detection algorithm and the generalized Hough transform, which can automatically discriminate the leads used for BSPM from other ECG leads. The pairing method is based on epi-polar constraint matching and line pattern detection which assumes that BSPM electrodes are arranged in strips. The proposed methods are tested on a thorax phantom and two clinical cases. Results show an accuracy of 0.33 ± 0.20mm for detecting electrodes in the X-ray images and a success rate of 95.4%. The automatic pairing method achieves a 91.2% success rate.

Item Type: Book Section
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Norwich Epidemiology Centre
Faculty of Medicine and Health Sciences > Research Groups > Norwich Epidemiology Centre
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Depositing User: LivePure Connector
Date Deposited: 03 Jan 2023 15:30
Last Modified: 19 May 2023 09:42
DOI: 10.1007/978-3-642-38899-6_32

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