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While pooling data across studies enables more powerful and broader applications, performing quantitative comparisons across datasets with varying acquisition or analysis methods is problematic due to inherent measurement biases specific to each protocol. We show how dynamic time warping and partial least squares regression can be applied to effectively map between left ventricular geometries derived from different imaging modalities and analysis protocols to account for such differences. To demonstrate this method, paired real-time 3D echocardiography (3DE) and cardiac magnetic resonance (CMR) sequences from 138 subjects were used to construct a mapping function between the two modalities to correct for biases in left ventricular clinical cardiac indices, as well as regional shape. Leave-one-out cross-validation revealed a significant reduction in mean bias, narrower limits of agreement, and higher intraclass correlation coefficients for all functional indices between CMR and 3DE geometries after spatiotemporal mapping. Meanwhile, average root mean squared errors between surface coordinates of 3DE and CMR geometries across the cardiac cycle decreased from 7\u2009\u00b1\u20091 to 4\u2009\u00b1\u20091\u00a0mm for the total study population. Our generalised method for mapping between time-varying cardiac geometries obtained using different acquisition and analysis protocols enables the pooling of data between modalities and the potential for smaller studies to leverage large population databases for quantitative comparisons.<\/jats:p>","DOI":"10.1038\/s41598-023-33968-5","type":"journal-article","created":{"date-parts":[[2023,5,19]],"date-time":"2023-05-19T06:02:44Z","timestamp":1684476164000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Correcting bias in cardiac geometries derived from multimodal images using spatiotemporal mapping"],"prefix":"10.1038","volume":"13","author":[{"given":"Debbie","family":"Zhao","sequence":"first","affiliation":[]},{"given":"Charl\u00e8ne A.","family":"Mauger","sequence":"additional","affiliation":[]},{"given":"Kathleen","family":"Gilbert","sequence":"additional","affiliation":[]},{"given":"Vicky Y.","family":"Wang","sequence":"additional","affiliation":[]},{"given":"Gina M.","family":"Quill","sequence":"additional","affiliation":[]},{"given":"Timothy M.","family":"Sutton","sequence":"additional","affiliation":[]},{"given":"Boris S.","family":"Lowe","sequence":"additional","affiliation":[]},{"given":"Malcolm E.","family":"Legget","sequence":"additional","affiliation":[]},{"given":"Peter N.","family":"Ruygrok","sequence":"additional","affiliation":[]},{"given":"Robert N.","family":"Doughty","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o","family":"Pedrosa","sequence":"additional","affiliation":[]},{"given":"Jan","family":"D\u2019hooge","sequence":"additional","affiliation":[]},{"given":"Alistair A.","family":"Young","sequence":"additional","affiliation":[]},{"given":"Martyn P.","family":"Nash","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,5,19]]},"reference":[{"issue":"2","key":"33968_CR1","doi-asserted-by":"publisher","first-page":"100","DOI":"10.1038\/s41569-018-0104-y","volume":"16","author":"SA Niederer","year":"2019","unstructured":"Niederer, S. 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