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

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 5mm in 97.6% of volunteer validations. For the patients, 2D accuracy was improved from 5 to 13mm before applying the model to 2-4mm afterwards. For the dynamic MRI sequence comparison, the highest errors were found when using the low resolution volume sequence with an unconstrained model.

journal_name

Med Image Anal

journal_title

Medical image analysis

authors

King AP,Boubertakh R,Rhode KS,Ma YL,Chinchapatnam P,Gao G,Tangcharoen T,Ginks M,Cooklin M,Gill JS,Hawkes DJ,Razavi RS,Schaeffter T

doi

10.1016/j.media.2009.01.003

subject

Has Abstract

pub_date

2009-06-01 00:00:00

pages

419-31

issue

3

eissn

1361-8415

issn

1361-8423

pii

S1361-8415(09)00004-8

journal_volume

13

pub_type

杂志文章

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