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A subject-specific technique for respiratory motion correction in image-guided cardiac catheterisation procedures

Research output: Contribution to journalArticle

A. P. King, R. Boubertakh, K. S. Rhode, Y. L. Ma, P. Chinchapatnam, G. Gao, T. Tangcharoen, M. Ginks, M. Cooklin, J. S. Gill, D. J. Hawkes, R. S. Razavi, T. Schaeffter

Original languageEnglish
Pages (from-to)419 - 431
Number of pages13
JournalMEDICAL IMAGE ANALYSIS
Volume13
Issue number3
DOIs
StatePublished - Jun 2009

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  • king_final.pdf

    king_final.pdf, 621 KB, application/pdf

    29/10/2012

    Submitted manuscript

King's Authors

Abstract

We describe a system for respiratory motion correction of MRI-derived roadmaps for use in X-ray guided cardiac catheterisation procedures. The technique uses a subject-specific affine motion model that is quickly constructed from a short pre-procedure MRI scan. We test a dynamic MRI sequence that acquires a small number of high resolution slices, rather than a single low resolution volume. Additionally, we use prior knowledge of the nature of cardiac respiratory motion by constraining the model to use only the dominant modes of motion. During the procedure the motion of the diaphragm is tracked in X-ray fluoroscopy images, allowing the roadmap to be updated using the motion model. X-ray image acquisition is cardiac gated. Validation is performed on four volunteer datasets and three patient datasets. The accuracy of the model in 3D was within 5 mm in 97.6% of volunteer validations. For the patients, 2D accuracy was improved from 5 to 13 mm before applying the model to 2-4 mm afterwards. For the dynamic MRI sequence comparison, the highest errors were found when using the low resolution volume sequence with an unconstrained model. (C) 2009 Elsevier B.V. All rights reserved.

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